From 731bdaad527d0c58abb34738878971cbb5dcdd0e Mon Sep 17 00:00:00 2001
From: Peak <45887317+Peakwastaken@users.noreply.github.com>
Date: Tue, 14 May 2024 21:03:40 -0400
Subject: [PATCH] Adds Oil Platform specials to spawn in the ocean (#73469)

* Adds Oil Platform specials to spawn in the ocean

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#### Summary
Content "Adds a new Special, Oil Platforms, to spawn in the ocean."
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#### Purpose of change
The ocean is completely devoid of content right now, and I understand it might make it very unappealing to work on before anything is actually there to make people interested in going there, so I figured I'd get the machine rolling while trying my hands at doing some mapping for CDDA !
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#### Describe the solution
This special is UNIQUE with a 5% chance of spawning per overmap, I tried using check_for_locations to prevent it from spawning to close to the short with no luck, so city_distance is what's kind of doing that for now.

It features mostly industrial loot  (Tools, electronics, work/diving clothes, heavy machinery, solar pannels), as well as quite a few skill books, medicine, food, some chemistry ingredients, and the potential for 55gal drums containing various fuel, as well as newly added crude oil (which I'd like to make a recipe to turn into fuel with a catalytic cracking reactor in the future).

There's a 20% chance for a helicopter spawn on the helipad, which might be a wreck (from the "helicopters" spawn group), and four 10% chance for single motor boat spawns by the pillars on the water. There's also up to three inflatable boats floating down below the emergency dockings on the east side.

Besides the most common types of zombies, It is mostly populated by zombie/feral mechanics or crewmen, swimmer zombies, and there are small chances of zapper/gasoline zombies to spawn. For the latter, there are four hardcoded locations with 5% chance of spawning, and some further chances in the zombie group a week in. Figured it'd work well thematically and could be interesting as either a boon or a bane depending on how you handle it.

I tried to stick as best as I could to what an oil platform could look like by doing quite a bit of research, the only thing I really skirted around was for the plume; a chimney that usually extends quite a ways out over the ocean to burn excess gas. I didn't want there to be somewhere you could just easily walk to and attract all the zombies to take a dive so easily, so it mostly goes up in height.

I went with a gravity based structure, the supporting pillars extending all the way to the bottom of the ocean, because I'd like, in a potential follow up, leave some room to add a small chance of it having a submerged hidden lab kind of thing in the concrete slab at the bottom. Such pillars usually are used to house piping that'd connect to underwater pipe-lines, so I figured it'd be good like this for now anyways ! Plus it makes it easier to justify every bit of piping that runs along the platform, which i've tried to do as best as possible.

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#### Describe alternatives you've considered

- As said above, adding a chance for a hidden submerged lab to be connected to the pillars going down - probably for a new project if it seems like a good idea.

- Adding ramps instead of stairs to the various walkways - seemed like idle zombies liked to kill themselves by walking up and dropping back down.

- Making it bigger and globally_unique, but I'd rather have both if possible !

- Adding even more chances for gasoline zombies to spawn as time progresses.

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#### Testing

Spawning in a new world, teleporting to the ocean, seems to spawn fine.

Going around to see if I've made any mistakes, fixed all the ones I could see.

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#### Additional context

Screenshots : (I'm not sure if this'll work but I'll try)

<blockquote class="imgur-embed-pub" lang="en" data-id="a/PHeXLWv" data-context="false" ><a href="//imgur.com/a/PHeXLWv"></a></blockquote><script async src="//s.imgur.com/min/embed.js" charset="utf-8"></script>

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* Of course I spot a mistake right after I create the PR

* Update data/json/furniture_and_terrain/terrain-manufactured.json

* Update data/json/furniture_and_terrain/terrain-manufactured.json

* Fixed wrong surface water type, a wrongly aligned pipe, and made the platform a little longer to avoid zombies spawning outside of its berth

* Added a catalytic cracking reactor, reworked the drum groups to make more sense where they spawn

* Fixed crude_oil's material and ammo type, removed processed fuel and the rope leading to the crane, replaced forklifts by trolleys, increased minimum city distance and liquid amount in containers

* Fixed crude_oil's material and ammo type, removed processed fuel and the rope leading to the crane, replaced forklifts by trolleys, increased minimum city distance and liquid amount in containers

* Accidentally modified the crude lamp oil energy value, this should fix it (Sorry, struggling a little with github here)

* Update data/json/mapgen/oil_platform/oil_platform_z2.json

* Update data/json/furniture_and_terrain/terrain-manufactured.json

* Update data/json/mapgen/oil_platform/oil_platform_z2.json

* Apply suggestions from code review

* Switched the tanks leading to the generators from salt water to diesel (didn't make sense)

* Update overmap_terrain_coverage_whitelist.json

* Update data/json/items/fuel.json

---------

Co-authored-by: Maleclypse <54345792+Maleclypse@users.noreply.github.com>
---
 .../terrain-manufactured.json                 |  96 ++++++
 data/json/items/ammo_types.json               |   6 +
 data/json/items/fuel.json                     |  24 ++
 .../mapgen/oil_platform/oil_platform_uw.json  | 117 +++++++
 .../mapgen/oil_platform/oil_platform_z-8.json | 117 +++++++
 .../mapgen/oil_platform/oil_platform_z-9.json | 117 +++++++
 .../mapgen/oil_platform/oil_platform_z0.json  | 151 +++++++++
 .../mapgen/oil_platform/oil_platform_z1.json  | 117 +++++++
 .../mapgen/oil_platform/oil_platform_z2.json  | 178 +++++++++++
 .../mapgen/oil_platform/oil_platform_z3.json  | 163 ++++++++++
 .../mapgen/oil_platform/oil_platform_z4.json  | 126 ++++++++
 .../mapgen/oil_platform/oil_platform_z5.json  | 137 ++++++++
 .../mapgen/oil_platform/oil_platform_z6.json  | 117 +++++++
 .../mapgen/oil_platform/oil_platform_z7.json  | 116 +++++++
 .../mapgen_palettes/oil_platform_palette.json | 297 ++++++++++++++++++
 data/json/materials.json                      |  11 +
 data/json/monstergroups/zombies.json          |  27 ++
 .../overmap/overmap_special/oil_platform.json | 216 +++++++++++++
 .../overmap_terrain_oil_platform.json         | 168 ++++++++++
 .../overmap_terrain_coverage_whitelist.json   | 134 +++++++-
 20 files changed, 2434 insertions(+), 1 deletion(-)
 create mode 100644 data/json/mapgen/oil_platform/oil_platform_uw.json
 create mode 100644 data/json/mapgen/oil_platform/oil_platform_z-8.json
 create mode 100644 data/json/mapgen/oil_platform/oil_platform_z-9.json
 create mode 100644 data/json/mapgen/oil_platform/oil_platform_z0.json
 create mode 100644 data/json/mapgen/oil_platform/oil_platform_z1.json
 create mode 100644 data/json/mapgen/oil_platform/oil_platform_z2.json
 create mode 100644 data/json/mapgen/oil_platform/oil_platform_z3.json
 create mode 100644 data/json/mapgen/oil_platform/oil_platform_z4.json
 create mode 100644 data/json/mapgen/oil_platform/oil_platform_z5.json
 create mode 100644 data/json/mapgen/oil_platform/oil_platform_z6.json
 create mode 100644 data/json/mapgen/oil_platform/oil_platform_z7.json
 create mode 100644 data/json/mapgen_palettes/oil_platform_palette.json
 create mode 100644 data/json/overmap/overmap_special/oil_platform.json
 create mode 100644 data/json/overmap/overmap_terrain/overmap_terrain_oil_platform.json

diff --git a/data/json/furniture_and_terrain/terrain-manufactured.json b/data/json/furniture_and_terrain/terrain-manufactured.json
index 219d5f22e204d..21c897d7c17db 100644
--- a/data/json/furniture_and_terrain/terrain-manufactured.json
+++ b/data/json/furniture_and_terrain/terrain-manufactured.json
@@ -447,6 +447,29 @@
       ]
     }
   },
+  {
+    "type": "terrain",
+    "id": "t_truss_pillar",
+    "name": "truss pillar",
+    "description": "A hollow metal pillar composed of interconnected beams that distribute loads efficiently while maintaining stability and strength.",
+    "symbol": "H",
+    "color": "light_gray",
+    "looks_like": "t_radio_tower",
+    "move_cost": 0,
+    "flags": [ "TRANSPARENT", "NOITEM", "PERMEABLE", "THIN_OBSTACLE" ],
+    "bash": {
+      "str_min": 60,
+      "str_max": 210,
+      "sound": "metal screeching!",
+      "sound_fail": "clang!",
+      "ter_set": "t_concrete",
+      "items": [
+        { "item": "steel_lump", "count": [ 1, 2 ] },
+        { "item": "steel_chunk", "count": [ 1, 4 ] },
+        { "item": "scrap", "count": [ 3, 12 ] }
+      ]
+    }
+  },
   {
     "type": "terrain",
     "id": "t_sewage_pipe",
@@ -483,6 +506,79 @@
       "sound": "metal screeching!",
       "sound_fail": "clang!",
       "ter_set": "t_sewage",
+      "items": [
+        { "item": "steel_lump", "count": [ 1, 4 ] },
+        { "item": "steel_chunk", "count": [ 1, 4 ] },
+        { "item": "pipe_fittings", "count": [ 0, 4 ] },
+        { "item": "scrap", "count": [ 3, 7 ] }
+      ]
+    }
+  },
+  {
+    "type": "terrain",
+    "id": "t_drill_machinery",
+    "name": "drilling machinery",
+    "description": "All the machinery required to operate and control de drill string and the drill bit down below.  It is now inactive.",
+    "symbol": "&",
+    "color": "black",
+    "looks_like": "f_machinery_heavy",
+    "move_cost": 0,
+    "coverage": 50,
+    "flags": [ "NOITEM", "WALL" ],
+    "bash": {
+      "str_min": 20,
+      "str_max": 150,
+      "sound": "metal screeching!",
+      "sound_fail": "clang!",
+      "ter_set": "t_open_air",
+      "items": [
+        { "item": "steel_plate", "count": [ 0, 4 ] },
+        { "item": "steel_chunk", "count": [ 1, 4 ] },
+        { "item": "scrap", "count": [ 3, 7 ] }
+      ]
+    }
+  },
+  {
+    "type": "terrain",
+    "id": "t_drill_string",
+    "name": "drill string",
+    "description": "An extremely resistant length of mechanical tubing used to reach deep under water and drill into pockets of oil.",
+    "symbol": "O",
+    "color": "black",
+    "looks_like": "t_little_column",
+    "move_cost": 0,
+    "coverage": 50,
+    "flags": [ "NOITEM", "THIN_OBSTACLE", "PERMEABLE" ],
+    "bash": {
+      "str_min": 30,
+      "str_max": 150,
+      "sound": "metal screeching!",
+      "sound_fail": "clang!",
+      "ter_set": "t_open_air",
+      "items": [
+        { "item": "steel_plate", "count": [ 0, 4 ] },
+        { "item": "steel_chunk", "count": [ 1, 4 ] },
+        { "item": "scrap", "count": [ 3, 7 ] }
+      ]
+    }
+  },
+  {
+    "type": "terrain",
+    "id": "t_underwater_drill_string",
+    "name": "drill string",
+    "description": "An extremely resistant length of mechanical tubing used to reach deep under water and drill into pockets of oil.",
+    "symbol": "O",
+    "color": "blue",
+    "looks_like": "t_little_column",
+    "move_cost": 0,
+    "coverage": 50,
+    "flags": [ "NOITEM", "THIN_OBSTACLE", "PERMEABLE" ],
+    "bash": {
+      "str_min": 30,
+      "str_max": 150,
+      "sound": "metal screeching!",
+      "sound_fail": "clang!",
+      "ter_set": "t_saltwater_cube",
       "items": [
         { "item": "steel_lump", "prob": 50 },
         { "item": "steel_chunk", "count": [ 1, 4 ] },
diff --git a/data/json/items/ammo_types.json b/data/json/items/ammo_types.json
index 9e29ba4ecc4d4..9a0d870ee8340 100644
--- a/data/json/items/ammo_types.json
+++ b/data/json/items/ammo_types.json
@@ -443,6 +443,12 @@
     "name": "motor oil",
     "default": "motor_oil"
   },
+  {
+    "type": "ammunition_type",
+    "id": "crude_oil",
+    "name": "crude oil",
+    "default": "crude_oil"
+  },
   {
     "type": "ammunition_type",
     "id": "thread",
diff --git a/data/json/items/fuel.json b/data/json/items/fuel.json
index 2b752fc2772d2..db7171259bd2c 100644
--- a/data/json/items/fuel.json
+++ b/data/json/items/fuel.json
@@ -203,6 +203,30 @@
     "damage": { "damage_type": "heat", "amount": 2, "armor_penetration": 2 },
     "effects": [ "FLAME", "STREAM" ]
   },
+  {
+    "id": "crude_oil",
+    "type": "AMMO",
+    "name": { "str_sp": "crude oil" },
+    "description": "A thick black slurry that can be refined to produce usable products including gasoline or diesel",
+    "category": "fuel",
+    "weight": "800 mg",
+    "volume": "200ml",
+    "price": 20,
+    "price_postapoc": 50,
+    "count": 250,
+    "stack_size": 200,
+    "phase": "liquid",
+    "looks_like": "diesel",
+    "container": "bottle_plastic",
+    "sealed": false,
+    "symbol": "=",
+    "color": "black",
+    "material": [ "crude_oil" ],
+    "ammo_type": "crude_oil",
+    "range": 3,
+    "damage": { "damage_type": "heat", "amount": 5, "armor_penetration": 5 },
+    "effects": [ "FLAME", "STREAM", "INCENDIARY" ]
+  },
   {
     "id": "napalm",
     "type": "AMMO",
diff --git a/data/json/mapgen/oil_platform/oil_platform_uw.json b/data/json/mapgen/oil_platform/oil_platform_uw.json
new file mode 100644
index 0000000000000..e511e91d1b6b6
--- /dev/null
+++ b/data/json/mapgen/oil_platform/oil_platform_uw.json
@@ -0,0 +1,117 @@
+[
+  {
+    "type": "mapgen",
+    "method": "json",
+    "om_terrain": [
+      [ "oil_platform_1a_uw", "oil_platform_1b_uw", "oil_platform_1c_uw" ],
+      [ "oil_platform_2a_uw", "oil_platform_2b_uw", "oil_platform_2c_uw" ],
+      [ "oil_platform_3a_uw", "oil_platform_3b_uw", "oil_platform_3c_uw" ],
+      [ "oil_platform_4a_uw", "oil_platform_4b_uw", "oil_platform_4c_uw" ]
+    ],
+    "object": {
+      "fill_ter": "t_metal_floor",
+      "rows": [
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "//////////////#####//////////////////////////////////#####//////////////",
+        "////////////#########//////////////////////////////#########////////////",
+        "///////////###########////////////////////////////###########///////////",
+        "//////////#############//////////////////////////#############//////////",
+        "//////////#############//////////////////////////#############//////////",
+        "/////////###############////////////////////////###############/////////",
+        "/////////######o.o######////////////////////////######o.o######/////////",
+        "/////////######.X.######////////////////////////######.X.######/////////",
+        "/////////######o.o######////////////////////////######o.o######/////////",
+        "/////////###############////////////////////////###############/////////",
+        "//////////#############//////////////////////////#############//////////",
+        "//////////#############//////////////////////////#############//////////",
+        "///////////###########////////////////////////////###########///////////",
+        "////////////#########//////////////////////////////#########////////////",
+        "//////////////#####//////////////////////////////////#####//////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "///////////////////////////////////‼o///////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "//////////////#####//////////////////////////////////#####//////////////",
+        "////////////#########//////////////////////////////#########////////////",
+        "///////////###########////////////////////////////###########///////////",
+        "//////////#############//////////////////////////#############//////////",
+        "//////////#############//////////////////////////#############//////////",
+        "/////////###############////////////////////////###############/////////",
+        "/////////######o.o######////////////////////////######o.o######/////////",
+        "/////////######.X.######////////////////////////######.X.######/////////",
+        "/////////######o.o######////////////////////////######o.o######/////////",
+        "/////////###############////////////////////////###############/////////",
+        "//////////#############//////////////////////////#############//////////",
+        "//////////#############//////////////////////////#############//////////",
+        "///////////###########////////////////////////////###########///////////",
+        "////////////#########//////////////////////////////#########////////////",
+        "//////////////#####//////////////////////////////////#####//////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////"
+      ],
+      "palettes": [ "oil_platform_palette" ],
+      "gaspumps": {  },
+      "signs": {  },
+      "terrain": { "‼": "t_underwater_drill_string" }
+    }
+  }
+]
diff --git a/data/json/mapgen/oil_platform/oil_platform_z-8.json b/data/json/mapgen/oil_platform/oil_platform_z-8.json
new file mode 100644
index 0000000000000..29c15ccb36140
--- /dev/null
+++ b/data/json/mapgen/oil_platform/oil_platform_z-8.json
@@ -0,0 +1,117 @@
+[
+  {
+    "type": "mapgen",
+    "method": "json",
+    "om_terrain": [
+      [ "oil_platform_1a_z-8", "oil_platform_1b_z-8", "oil_platform_1c_z-8" ],
+      [ "oil_platform_2a_z-8", "oil_platform_2b_z-8", "oil_platform_2c_z-8" ],
+      [ "oil_platform_3a_z-8", "oil_platform_3b_z-8", "oil_platform_3c_z-8" ],
+      [ "oil_platform_4a_z-8", "oil_platform_4b_z-8", "oil_platform_4c_z-8" ]
+    ],
+    "object": {
+      "fill_ter": "t_metal_floor",
+      "rows": [
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "//////////////#####☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#####//////////////",
+        "////////////#########☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#########////////////",
+        "///////////###########☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼###########///////////",
+        "//////////#############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#############//////////",
+        "//////////#############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#############//////////",
+        "/////////###############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼###############/////////",
+        "/////////######o.o######☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼######o.o######/////////",
+        "/////////######.X.######☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼######.X.######/////////",
+        "/////////######o.o######☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼######o.o######/////////",
+        "/////////###############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼###############/////////",
+        "/////////☼#############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#############☼/////////",
+        "/////////☼#############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#############☼/////////",
+        "/////////☼☼###########☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼###########☼☼/////////",
+        "/////////☼☼☼#########☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#########☼☼☼/////////",
+        "/////////☼☼☼☼☼#####☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#####☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼//////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼////////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼////////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼//////////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼//////////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼//////‼o//////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼//////////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼//////////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼////////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼////////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼//////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼/////////",
+        "/////////☼☼☼☼☼#####☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#####☼☼☼☼☼/////////",
+        "/////////☼☼☼#########☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#########☼☼☼/////////",
+        "/////////☼☼###########☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼###########☼☼/////////",
+        "/////////☼#############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#############☼/////////",
+        "/////////☼#############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#############☼/////////",
+        "/////////###############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼###############/////////",
+        "/////////######o.o######☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼######o.o######/////////",
+        "/////////######.X.######☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼######.X.######/////////",
+        "/////////######o.o######☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼######o.o######/////////",
+        "/////////###############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼###############/////////",
+        "//////////#############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#############//////////",
+        "//////////#############☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#############//////////",
+        "///////////###########☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼###########///////////",
+        "////////////#########☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#########////////////",
+        "//////////////#####☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼#####//////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////"
+      ],
+      "palettes": [ "oil_platform_palette" ],
+      "gaspumps": {  },
+      "signs": {  },
+      "terrain": { "☼": "t_lake_bed_concrete", "‼": "t_underwater_drill_string" }
+    }
+  }
+]
diff --git a/data/json/mapgen/oil_platform/oil_platform_z-9.json b/data/json/mapgen/oil_platform/oil_platform_z-9.json
new file mode 100644
index 0000000000000..9daa4cd199e62
--- /dev/null
+++ b/data/json/mapgen/oil_platform/oil_platform_z-9.json
@@ -0,0 +1,117 @@
+[
+  {
+    "type": "mapgen",
+    "method": "json",
+    "om_terrain": [
+      [ "oil_platform_1a_z-9", "oil_platform_1b_z-9", "oil_platform_1c_z-9" ],
+      [ "oil_platform_2a_z-9", "oil_platform_2b_z-9", "oil_platform_2c_z-9" ],
+      [ "oil_platform_3a_z-9", "oil_platform_3b_z-9", "oil_platform_3c_z-9" ],
+      [ "oil_platform_4a_z-9", "oil_platform_4b_z-9", "oil_platform_4c_z-9" ]
+    ],
+    "object": {
+      "fill_ter": "t_metal_floor",
+      "rows": [
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "//////////////############################################//////////////",
+        "////////////################################################////////////",
+        "///////////##################################################///////////",
+        "//////////####################################################//////////",
+        "//////////####################################################//////////",
+        "/////////######################################################/////////",
+        "/////////######o.o####################################o.o######/////////",
+        "/////////######.^.####################################.^.######/////////",
+        "/////////######o.o####################################o.o######/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////########################☼☼☼☼☼☼########################/////////",
+        "/////////#######################☼☼☼☼☼☼☼☼#######################/////////",
+        "/////////#####################☼☼☼☼☼☼☼☼☼☼☼☼#####################/////////",
+        "/////////#####################☼☼☼☼☼☼☼☼☼☼☼☼#####################/////////",
+        "/////////####################☼☼☼☼☼☼☼☼☼☼☼☼☼☼####################/////////",
+        "/////////####################☼☼☼☼☼☼☼☼☼☼☼☼☼☼####################/////////",
+        "/////////####################☼☼☼☼☼☼‼o☼☼☼☼☼☼####################/////////",
+        "/////////####################☼☼☼☼☼☼☼☼☼☼☼☼☼☼####################/////////",
+        "/////////####################☼☼☼☼☼☼☼☼☼☼☼☼☼☼####################/////////",
+        "/////////#####################☼☼☼☼☼☼☼☼☼☼☼☼#####################/////////",
+        "/////////#####################☼☼☼☼☼☼☼☼☼☼☼☼#####################/////////",
+        "/////////#######################☼☼☼☼☼☼☼☼#######################/////////",
+        "/////////########################☼☼☼☼☼☼########################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######################################################/////////",
+        "/////////######o.o####################################o.o######/////////",
+        "/////////######.^.####################################.^.######/////////",
+        "/////////######o.o####################################o.o######/////////",
+        "/////////######################################################/////////",
+        "//////////####################################################//////////",
+        "//////////####################################################//////////",
+        "///////////##################################################///////////",
+        "////////////################################################////////////",
+        "//////////////############################################//////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////",
+        "////////////////////////////////////////////////////////////////////////"
+      ],
+      "palettes": [ "oil_platform_palette" ],
+      "gaspumps": {  },
+      "signs": {  },
+      "terrain": { "☼": "t_ocean_bed", "‼": "t_underwater_drill_string" }
+    }
+  }
+]
diff --git a/data/json/mapgen/oil_platform/oil_platform_z0.json b/data/json/mapgen/oil_platform/oil_platform_z0.json
new file mode 100644
index 0000000000000..d8e87457b25fe
--- /dev/null
+++ b/data/json/mapgen/oil_platform/oil_platform_z0.json
@@ -0,0 +1,151 @@
+[
+  {
+    "type": "mapgen",
+    "method": "json",
+    "om_terrain": [
+      [ "oil_platform_1a_0", "oil_platform_1b_0", "oil_platform_1c_0" ],
+      [ "oil_platform_2a_0", "oil_platform_2b_0", "oil_platform_2c_0" ],
+      [ "oil_platform_3a_0", "oil_platform_3b_0", "oil_platform_3c_0" ],
+      [ "oil_platform_4a_0", "oil_platform_4b_0", "oil_platform_4c_0" ]
+    ],
+    "object": {
+      "fill_ter": "t_bridge",
+      "rows": [
+        "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~",
+        "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~",
+        "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~",
+        "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~",
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diff --git a/data/json/mapgen/oil_platform/oil_platform_z1.json b/data/json/mapgen/oil_platform/oil_platform_z1.json
new file mode 100644
index 0000000000000..eeff6a63547ae
--- /dev/null
+++ b/data/json/mapgen/oil_platform/oil_platform_z1.json
@@ -0,0 +1,117 @@
+[
+  {
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+      [ "oil_platform_1a_1", "oil_platform_1b_1", "oil_platform_1c_1" ],
+      [ "oil_platform_2a_1", "oil_platform_2b_1", "oil_platform_2c_1" ],
+      [ "oil_platform_3a_1", "oil_platform_3b_1", "oil_platform_3c_1" ],
+      [ "oil_platform_4a_1", "oil_platform_4b_1", "oil_platform_4c_1" ]
+    ],
+    "object": {
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diff --git a/data/json/mapgen/oil_platform/oil_platform_z2.json b/data/json/mapgen/oil_platform/oil_platform_z2.json
new file mode 100644
index 0000000000000..9cc17a3fef91e
--- /dev/null
+++ b/data/json/mapgen/oil_platform/oil_platform_z2.json
@@ -0,0 +1,178 @@
+[
+  {
+    "type": "mapgen",
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+    "om_terrain": [
+      [ "oil_platform_1a_2", "oil_platform_1b_2", "oil_platform_1c_2" ],
+      [ "oil_platform_2a_2", "oil_platform_2b_2", "oil_platform_2c_2" ],
+      [ "oil_platform_3a_2", "oil_platform_3b_2", "oil_platform_3c_2" ],
+      [ "oil_platform_4a_2", "oil_platform_4b_2", "oil_platform_4c_2" ]
+    ],
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+          { "liquid": "crude_oil", "amount": [ 1, 4 ], "chance": 120 }
+        ],
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+      },
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+      "terrain": { "n": "t_bridge", "‼": "t_drill_string" },
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+          { "item": "diving_glasses", "chance": 35, "repeat": [ 0, 1 ] },
+          { "item": "diving_gloves", "chance": 25, "repeat": [ 0, 1 ] },
+          { "item": "diving_head", "chance": 25, "repeat": [ 0, 1 ] },
+          { "item": "diving_masks", "chance": 35, "repeat": [ 0, 1 ] },
+          { "item": "diving_pants", "chance": 25, "repeat": [ 0, 1 ] },
+          { "item": "diving_shoes", "chance": 25, "repeat": [ 0, 1 ] },
+          { "item": "diving_suits", "chance": 25, "repeat": [ 0, 1 ] },
+          { "item": "diving_torso", "chance": 25, "repeat": [ 0, 1 ] },
+          { "item": "diving_wetsuit", "chance": 25, "repeat": [ 0, 1 ] }
+        ],
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+          { "item": "tools_construction", "chance": 5 },
+          { "item": "tools_common", "chance": 20, "repeat": [ 0, 2 ] },
+          { "item": "tools_electronics", "chance": 10, "repeat": [ 0, 2 ] },
+          { "item": "tools_lighting_industrial", "chance": 10, "repeat": [ 0, 2 ] },
+          { "item": "tools_mechanic", "chance": 10, "repeat": [ 0, 1 ] },
+          { "item": "hardware_plumbing", "chance": 10 },
+          { "item": "mechanics", "chance": 5, "repeat": [ 0, 1 ] },
+          { "item": "SUS_welding_gear", "chance": 5, "repeat": [ 0, 1 ] },
+          { "item": "sewage_plant", "chance": 2, "repeat": [ 1, 2 ] },
+          { "item": "supplies_electronics", "chance": 15 },
+          { "item": "home_hw", "chance": 5, "repeat": [ 0, 1 ] },
+          { "item": "hardware", "chance": 10, "repeat": [ 1, 2 ] },
+          { "item": "tools_science", "chance": 1, "repeat": [ 0, 1 ] },
+          { "item": "hardware_trash", "chance": 15 },
+          { "item": "hospital_lab", "chance": 2, "repeat": [ 0, 1 ] },
+          { "item": "trash", "chance": 10, "repeat": [ 0, 2 ] },
+          { "item": "metal_workshop", "chance": 2 }
+        ],
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+          { "item": "office", "chance": 5, "repeat": [ 1, 2 ] },
+          { "item": "consumer_electronics", "chance": 5 },
+          { "item": "tools_common", "chance": 10 },
+          { "item": "tools_electronics", "chance": 5, "repeat": [ 0, 2 ] },
+          { "item": "office_supplies", "chance": 5 }
+        ],
+        "N": [
+          { "item": "drugs_pharmacy", "chance": 90, "repeat": [ 1, 3 ] },
+          { "item": "drugs_emergency", "chance": 70, "repeat": [ 0, 3 ] },
+          { "item": "harddrugs", "chance": 30, "repeat": [ 0, 2 ] },
+          { "item": "used_1st_aid", "chance": 30 },
+          { "item": "full_1st_aid", "chance": 90 }
+        ],
+        "3": [ { "item": "adhesive_bandages_box_used", "chance": 40 }, { "item": "used_1st_aid", "chance": 30 } ]
+      }
+    }
+  }
+]
diff --git a/data/json/mapgen/oil_platform/oil_platform_z3.json b/data/json/mapgen/oil_platform/oil_platform_z3.json
new file mode 100644
index 0000000000000..a0f5fc4a9b378
--- /dev/null
+++ b/data/json/mapgen/oil_platform/oil_platform_z3.json
@@ -0,0 +1,163 @@
+[
+  {
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+    "method": "json",
+    "om_terrain": [
+      [ "oil_platform_1a_3", "oil_platform_1b_3", "oil_platform_1c_3" ],
+      [ "oil_platform_2a_3", "oil_platform_2b_3", "oil_platform_2c_3" ],
+      [ "oil_platform_3a_3", "oil_platform_3b_3", "oil_platform_3c_3" ],
+      [ "oil_platform_4a_3", "oil_platform_4b_3", "oil_platform_4c_3" ]
+    ],
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+          { "item": "cannedfood", "chance": 90, "repeat": [ 1, 5 ] },
+          { "item": "groce_ingredient", "chance": 90, "repeat": [ 1, 5 ] }
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+          { "item": "crate_kitchen", "chance": 20, "repeat": [ 0, 1 ] },
+          { "item": "kitchen_counters", "chance": 20, "repeat": [ 0, 1 ] }
+        ],
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+          { "item": "tools_mechanic", "chance": 10, "repeat": [ 0, 1 ] },
+          { "item": "SUS_welding_gear", "chance": 10, "repeat": [ 1, 2 ] },
+          { "item": "supplies_electronics", "chance": 40, "repeat": [ 0, 2 ] },
+          { "item": "hardware_trash", "chance": 15 },
+          { "item": "trash", "chance": 5, "repeat": [ 0, 2 ] }
+        ],
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+      }
+    }
+  }
+]
diff --git a/data/json/mapgen/oil_platform/oil_platform_z4.json b/data/json/mapgen/oil_platform/oil_platform_z4.json
new file mode 100644
index 0000000000000..269eb419974dc
--- /dev/null
+++ b/data/json/mapgen/oil_platform/oil_platform_z4.json
@@ -0,0 +1,126 @@
+[
+  {
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+      [ "oil_platform_2a_4", "oil_platform_2b_4", "oil_platform_2c_4" ],
+      [ "oil_platform_3a_4", "oil_platform_3b_4", "oil_platform_3c_4" ],
+      [ "oil_platform_4a_4", "oil_platform_4b_4", "oil_platform_4c_4" ]
+    ],
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+      ],
+      "palettes": [ "oil_platform_palette" ],
+      "gaspumps": {  },
+      "signs": {  },
+      "terrain": { "π": "t_tile_flat_roof", "È": "t_tile_flat_roof" },
+      "items": {
+        "K": [
+          { "item": "office_mess", "chance": 10, "repeat": [ 1, 2 ] },
+          { "item": "office", "chance": 10, "repeat": [ 1, 2 ] },
+          { "item": "consumer_electronics", "chance": 15 },
+          { "item": "office_supplies", "chance": 15 }
+        ],
+        "p": { "item": "clothing_work_set", "chance": 85, "repeat": [ 0, 4 ] }
+      }
+    }
+  }
+]
diff --git a/data/json/mapgen/oil_platform/oil_platform_z5.json b/data/json/mapgen/oil_platform/oil_platform_z5.json
new file mode 100644
index 0000000000000..cd590ad6f2268
--- /dev/null
+++ b/data/json/mapgen/oil_platform/oil_platform_z5.json
@@ -0,0 +1,137 @@
+[
+  {
+    "type": "mapgen",
+    "method": "json",
+    "om_terrain": [
+      [ "oil_platform_1a_5", "oil_platform_1b_5", "oil_platform_1c_5" ],
+      [ "oil_platform_2a_5", "oil_platform_2b_5", "oil_platform_2c_5" ],
+      [ "oil_platform_3a_5", "oil_platform_3b_5", "oil_platform_3c_5" ],
+      [ "oil_platform_4a_5", "oil_platform_4b_5", "oil_platform_4c_5" ]
+    ],
+    "object": {
+      "fill_ter": "t_tile_flat_roof",
+      "rows": [
+        "........................................................................",
+        "........................................................................",
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+      ],
+      "palettes": [ "oil_platform_palette" ],
+      "gaspumps": {  },
+      "signs": {  },
+      "terrain": {
+        "3": "t_floor_noroof",
+        "≥": "t_floor_noroof",
+        "τ": "t_floor_noroof",
+        "ψ": "t_floor_noroof",
+        "b": "t_floor_noroof",
+        "D": "t_floor_noroof",
+        "8": "t_bridge",
+        "Ƨ": "t_metal_floor",
+        "é": "t_metal_floor"
+      },
+      "items": {
+        ",": [ { "item": "laundromat_containers", "chance": 5 }, { "item": "laundromat_bleach", "chance": 5 } ],
+        "3": [ { "item": "laundromat_containers", "chance": 5 }, { "item": "laundromat_bleach", "chance": 65 } ],
+        "≥": { "item": "laundry", "chance": 50, "repeat": [ 5, 15 ] },
+        "τ": { "item": "laundry", "chance": 50, "repeat": [ 5, 15 ] }
+      },
+      "liquids": {
+        "…": { "liquid": "water_clean", "amount": [ 250, 2500 ] },
+        "0": { "liquid": "water_sewage", "amount": [ 250, 1500 ] }
+      }
+    }
+  }
+]
diff --git a/data/json/mapgen/oil_platform/oil_platform_z6.json b/data/json/mapgen/oil_platform/oil_platform_z6.json
new file mode 100644
index 0000000000000..ab6644a87a476
--- /dev/null
+++ b/data/json/mapgen/oil_platform/oil_platform_z6.json
@@ -0,0 +1,117 @@
+[
+  {
+    "type": "mapgen",
+    "method": "json",
+    "om_terrain": [
+      [ "oil_platform_1a_6", "oil_platform_1b_6", "oil_platform_1c_6" ],
+      [ "oil_platform_2a_6", "oil_platform_2b_6", "oil_platform_2c_6" ],
+      [ "oil_platform_3a_6", "oil_platform_3b_6", "oil_platform_3c_6" ],
+      [ "oil_platform_4a_6", "oil_platform_4b_6", "oil_platform_4c_6" ]
+    ],
+    "object": {
+      "fill_ter": "t_tile_flat_roof",
+      "rows": [
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+        ".........|-π------------------------------π-|............yyy:::::yyy....",
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+        ".........||||||||||||||||||||||||||||||||||||...........................",
+        "........................................................................",
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+        "........................................................................",
+        "...........==X================================..........................",
+        "..........##ZZ  ↑ ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ.........................",
+        "..........##Z↑    ...↑...↑...↑...↑...↑...↑...↑..........................",
+        "..............  ↑ ......................................................",
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+      ],
+      "palettes": [ "oil_platform_palette" ],
+      "gaspumps": {  },
+      "signs": {  },
+      "terrain": { "→": "t_thconc_y" }
+    }
+  }
+]
diff --git a/data/json/mapgen/oil_platform/oil_platform_z7.json b/data/json/mapgen/oil_platform/oil_platform_z7.json
new file mode 100644
index 0000000000000..aded40d0d0331
--- /dev/null
+++ b/data/json/mapgen/oil_platform/oil_platform_z7.json
@@ -0,0 +1,116 @@
+[
+  {
+    "type": "mapgen",
+    "method": "json",
+    "om_terrain": [
+      [ "oil_platform_1a_7", "oil_platform_1b_7", "oil_platform_1c_7" ],
+      [ "oil_platform_2a_7", "oil_platform_2b_7", "oil_platform_2c_7" ],
+      [ "oil_platform_3a_7", "oil_platform_3b_7", "oil_platform_3c_7" ],
+      [ "oil_platform_4a_7", "oil_platform_4b_7", "oil_platform_4c_7" ]
+    ],
+    "object": {
+      "fill_ter": "t_tile_flat_roof",
+      "rows": [
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+        "........=ZH!HZ=.........................................=ZH!HZ=.........",
+        "........=Z▐▐▐Z=.........................................=Z▐▐▐Z=.........",
+        "........=ZHvHZ=.........................................=ZHvHZ=.........",
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+      ],
+      "palettes": [ "oil_platform_palette" ],
+      "gaspumps": {  },
+      "signs": {  }
+    }
+  }
+]
diff --git a/data/json/mapgen_palettes/oil_platform_palette.json b/data/json/mapgen_palettes/oil_platform_palette.json
new file mode 100644
index 0000000000000..cc6aa36265700
--- /dev/null
+++ b/data/json/mapgen_palettes/oil_platform_palette.json
@@ -0,0 +1,297 @@
+[
+  {
+    "type": "palette",
+    "id": "oil_platform_palette",
+    "liquids": { "-": { "liquid": "salt_water", "amount": [ 1, 4 ], "chance": 140 } },
+    "terrain": {
+      "~": "t_swater_dp",
+      "/": "t_saltwater_cube",
+      "^": "t_ladder_up",
+      "v": "t_ladder_down",
+      "#": "t_concrete_wall_w",
+      ".": "t_open_air",
+      "X": "t_ladder_up_down",
+      "=": "t_metal_railing",
+      "Y": "t_metal_floor",
+      "Z": "t_bridge",
+      "_": "t_strconc_floor_no_roof",
+      ",": "t_floor_noroof",
+      "?": [ [ "t_door_metal_interior_locked", 5 ], "t_door_metal_c" ],
+      "o": "t_sewage_pipe",
+      ">": "t_stairs_down",
+      "<": "t_stairs_up",
+      "+": [ [ "t_door_c", 30 ], [ "t_door_o", 25 ], [ "t_door_locked", 20 ] ],
+      "y": "t_thconc_y",
+      ":": "t_thconc_floor_no_roof",
+      "6": "t_gates_mech_control",
+      "7": "t_door_metal_locked",
+      "W": [
+        [ "t_window_frame", 5 ],
+        [ "t_window_domestic", 5 ],
+        "t_window_no_curtains",
+        "t_window_open",
+        "t_window_no_curtains_open",
+        [ "t_curtains", 5 ]
+      ],
+      "-": "t_tile_flat_roof",
+      "|": "t_gutter",
+      "T": "t_support_l",
+      "t": "t_support_s",
+      "H": "t_radio_tower",
+      "þ": "t_radio_controls",
+      "↑": "t_little_column",
+      "u": "t_truss_pillar",
+      "*": [ [ "t_window", 13 ], [ "t_window_frame", 5 ] ],
+      "J": "t_gutter_downspout",
+      "÷": "t_metal_ventilation_shutter",
+      "U": "t_linoleum_white",
+      "S": "t_linoleum_white",
+      "g": "t_linoleum_white",
+      ")": "t_linoleum_white",
+      "(": "t_carpet_wood_yellow",
+      "•": "t_sewage_pump",
+      "L": [ "t_sai_box_damaged", "t_sai_box" ],
+      "O": "t_potential_trans",
+      "q": "t_current_trans",
+      "R": "t_fence_rope",
+      " ": "t_metal_roof",
+      "á": "t_backboard",
+      "▐": "t_bridge",
+      "!": "t_bridge",
+      "[": "t_scrap_wall",
+      "]": "t_scrap_wall_halfway",
+      "↓": "t_rope_up",
+      "‼": "t_drill_machinery"
+    },
+    "furniture": {
+      "0": "f_standing_tank",
+      "…": "f_standing_tank",
+      "1": "f_control_station",
+      "2": "f_electrical_conduit",
+      "3": "f_table",
+      "4": "f_oven",
+      "5": "f_woodstove",
+      "9": "f_water_heater",
+      "8": "f_generator_broken",
+      "A": "f_air_compressor",
+      "C": "f_workbench",
+      "E": "f_shaker",
+      "G": "f_stool",
+      "e": "f_desk",
+      "K": "f_counter",
+      "I": "f_IV_pole",
+      "m": "f_anesthetic",
+      "k": "f_ventilator",
+      "M": "f_dialysis",
+      "N": "f_glass_cabinet",
+      "f": "f_fridge",
+      "S": "f_sink",
+      "Q": "f_utility_shelf",
+      "}": "f_utility_shelf",
+      "ψ": [ [ "f_fireman_cabinet", 40 ], [ "f_fireman_cabinet_o", 10 ], [ "f_fireman_cabinet_b", 10 ] ],
+      "U": "f_shower",
+      "w": "f_water_purifier",
+      "b": "f_bench",
+      "c": "f_cupboard",
+      "ç": "f_cupboard",
+      "B": "f_bookcase",
+      "h": "f_chair",
+      "d": [ "f_wardrobe", "f_dresser" ],
+      "l": [ "f_foot_locker", "f_foot_locker_aluminum" ],
+      "@": "f_triple_bunkbed",
+      "j": [ [ "f_curtain", 10 ], [ "f_curtain_open", 2 ] ],
+      "é": "f_console_broken",
+      "è": "f_console_broken_table",
+      "õ": [ [ "f_crate_c", 30 ], [ "f_crate_o", 10 ], [ "f_cardboard_box", 15 ], [ "f_null", 5 ] ],
+      "&": "f_filing_cabinet",
+      "ý": [ "f_indoor_plant", "f_indoor_plant_y" ],
+      "z": "f_trashcan",
+      "§": "f_counter_gate_c",
+      "p": "f_locker",
+      "P": "f_exercise",
+      "r": "f_canvas_floor",
+      "s": "f_punching_bag",
+      "V": "f_ergometer",
+      "x": "f_treadmill",
+      "æ": "f_air_compressor",
+      "ø": "f_capacitor",
+      "┴": "f_bed",
+      "╟": "f_GC",
+      "┼": "f_HPLC",
+      "┐": "f_MS",
+      "╜": "f_chemical_mixer",
+      "»": "f_lab_bench",
+      "«": "f_heavy_lathe",
+      "¼": "f_bandsaw",
+      "¿": "f_hydraulic_press",
+      "º": "f_drill_press",
+      "≥": "f_washer",
+      "≡": "f_dishwasher",
+      "τ": "f_dryer",
+      "±": "f_freezer",
+      "µ": "f_dumpster",
+      "φ": "f_pinball_machine",
+      "▀": "f_pool_table",
+      "▐": "f_small_satellite_dish",
+      "π": "f_roof_turbine_vent",
+      "¶": "f_solar_unit",
+      ";": "f_eyewash",
+      "ì": "f_vent_pipe",
+      "ð": "f_sofa",
+      "È": "f_air_conditioner",
+      "!": "f_cellphone_booster",
+      "Ä": "f_speaker_cabinet"
+    },
+    "toilets": { "g": {  } },
+    "items": {
+      "I": [ { "item": "saline_bottle_random", "chance": 100 } ],
+      "B": [
+        { "item": "book_survival", "chance": 5 },
+        { "item": "literature", "chance": 5 },
+        { "item": "novels", "chance": 55, "repeat": [ 6, 10 ] },
+        { "item": "hardware_books", "chance": 15 },
+        { "item": "exotic_books", "chance": 2 },
+        { "item": "carpentrybooks", "chance": 15 },
+        { "item": "religious_books", "chance": 35, "repeat": [ 0, 3 ] },
+        { "item": "manuals", "chance": 15 },
+        { "item": "textbooks", "chance": 5 },
+        { "item": "lab_bookshelves", "chance": 5 },
+        { "item": "tailorbooks", "chance": 5 },
+        { "item": "magazines", "chance": 35, "repeat": [ 1, 3 ] }
+      ],
+      "@": [
+        { "item": "bed", "chance": 50 },
+        { "item": "magazines", "chance": 5, "repeat": [ 0, 1 ] },
+        { "item": "literature", "chance": 5, "repeat": [ 0, 1 ] },
+        { "item": "novels", "chance": 5, "repeat": [ 0, 1 ] },
+        { "item": "phones", "chance": 5, "repeat": [ 0, 1 ] }
+      ],
+      "Q": [
+        { "item": "tools_common", "chance": 20 },
+        { "item": "tools_electronics", "chance": 55, "repeat": [ 0, 2 ] },
+        { "item": "tools_mechanic", "chance": 5, "repeat": [ 0, 1 ] },
+        { "item": "SUS_welding_gear", "chance": 5, "repeat": [ 1, 2 ] },
+        { "item": "supplies_electronics", "chance": 40, "repeat": [ 0, 2 ] },
+        { "item": "hardware_trash", "chance": 15 },
+        { "item": "trash", "chance": 5, "repeat": [ 0, 2 ] }
+      ],
+      "c": [
+        { "item": "tools_common", "chance": 20 },
+        { "item": "tools_electronics", "chance": 55, "repeat": [ 0, 2 ] },
+        { "item": "supplies_electronics", "chance": 30, "repeat": [ 0, 2 ] },
+        { "item": "hardware_trash", "chance": 15 },
+        { "item": "trash", "chance": 5, "repeat": [ 0, 2 ] },
+        { "item": "file_room", "chance": 20, "repeat": [ 1, 2 ] },
+        { "item": "office_paper", "chance": 20, "repeat": [ 3, 4 ] },
+        { "item": "office", "chance": 25 }
+      ],
+      "ψ": [ { "item": "fireman_cabinet", "chance": 80 } ],
+      "õ": [
+        { "item": "tools_common", "chance": 20 },
+        { "item": "hardware_bulk", "chance": 30, "repeat": [ 1, 3 ] },
+        { "item": "plumbing_bulk", "chance": 30, "repeat": [ 1, 2 ] },
+        { "item": "supplies_electronics", "chance": 10, "repeat": [ 1, 2 ] },
+        { "item": "mechanics", "chance": 8, "repeat": [ 1, 2 ] },
+        { "item": "supplies_reagents_lab", "chance": 2, "repeat": [ 1, 3 ] },
+        { "item": "metal_workshop", "chance": 10 }
+      ],
+      "-": [ { "item": "roof_trash", "chance": 3 } ],
+      "&": [
+        { "item": "magazines", "chance": 5 },
+        { "item": "file_room", "chance": 50, "repeat": [ 1, 2 ] },
+        { "item": "office_paper", "chance": 50, "repeat": [ 3, 4 ] },
+        { "item": "office", "chance": 25 },
+        { "item": "maps", "chance": 3 },
+        { "item": "office_mess", "chance": 15, "repeat": [ 1, 2 ] },
+        { "item": "trash", "chance": 5, "repeat": [ 0, 2 ] },
+        { "item": "office_supplies", "chance": 25 }
+      ],
+      "z": { "item": "trash", "chance": 90, "repeat": [ 0, 8 ] },
+      "µ": [
+        { "item": "trash", "chance": 90, "repeat": [ 5, 15 ] },
+        { "item": "rolling_trash", "chance": 90, "repeat": [ 2, 10 ] }
+      ],
+      "S": { "item": "SUS_bathroom_sink", "chance": 80, "repeat": [ 0, 2 ] },
+      "d": [
+        { "item": "SUS_dresser_mens", "chance": 90, "repeat": [ 0, 5 ] },
+        { "item": "SUS_dresser_womens", "chance": 80, "repeat": [ 0, 4 ] },
+        { "item": "bags_trip", "chance": 15 },
+        { "item": "small_bags", "chance": 30 }
+      ],
+      "l": [
+        { "item": "SUS_dresser_mens", "chance": 60, "repeat": [ 0, 1 ] },
+        { "item": "SUS_dresser_womens", "chance": 60, "repeat": [ 0, 1 ] },
+        { "item": "SUS_bathroom_medicine", "chance": 15, "repeat": [ 0, 1 ] },
+        { "item": "used_1st_aid", "chance": 5 },
+        { "item": "phones", "chance": 15, "repeat": [ 0, 1 ] },
+        { "item": "magazines", "chance": 15, "repeat": [ 0, 1 ] },
+        { "item": "literature", "chance": 15, "repeat": [ 0, 1 ] },
+        { "item": "novels", "chance": 15, "repeat": [ 0, 1 ] },
+        { "item": "hardware_books", "chance": 5 },
+        { "item": "manuals", "chance": 5 },
+        { "item": "tools_common", "chance": 15 },
+        { "item": "adhesive_bandages_box_used", "chance": 5 },
+        { "item": "textbooks", "chance": 5 },
+        { "item": "groce_softdrink", "chance": 30, "repeat": [ 0, 1 ] }
+      ],
+      "}": [ { "item": "cleaning_bulk", "chance": 80, "repeat": [ 0, 4 ] } ],
+      "»": [ { "item": "chem_lab", "chance": 70, "repeat": [ 0, 4 ] } ],
+      "f": [
+        { "item": "sea_restaur_fridge", "chance": 100, "repeat": [ 2, 25 ] },
+        { "item": "restaur_fridge", "chance": 100, "repeat": [ 2, 25 ] },
+        { "item": "groce_softdrink", "chance": 100, "repeat": [ 2, 10 ] }
+      ],
+      "3": [
+        { "item": "softdrinks_canned", "chance": 15 },
+        { "item": "office_supplies", "chance": 15 },
+        { "item": "office_paper", "chance": 15 }
+      ],
+      "±": [
+        { "item": "groce_frozen", "chance": 80, "repeat": [ 1, 5 ] },
+        { "item": "groce_meat", "chance": 80, "repeat": [ 0, 8 ] },
+        { "item": "toasterpastryfrozen_box_snack_2", "chance": 80, "repeat": [ 1, 3 ] }
+      ],
+      "ç": [
+        { "item": "kitchen_nonfood", "chance": 80, "repeat": [ 0, 5 ] },
+        { "item": "kitchen_appliances", "chance": 80, "repeat": [ 0, 5 ] },
+        { "item": "crate_kitchen", "chance": 80, "repeat": [ 0, 5 ] },
+        { "item": "kitchen_counters", "chance": 80, "repeat": [ 0, 5 ] },
+        { "item": "groce_condiment", "chance": 80, "repeat": [ 2, 5 ] }
+      ],
+      "4": [ { "item": "SUS_oven", "chance": 85, "repeat": [ 0, 4 ] } ],
+      "≡": [ { "item": "SUS_dishwasher", "chance": 85, "repeat": [ 0, 4 ] } ],
+      "`": { "item": "oil_drums", "chance": 60 },
+      "♫": { "item": "lubricant", "chance": 50 },
+      "▀": { "item": "pool_table", "chance": 60 }
+    },
+    "vehicles": {
+      "Ƨ": { "vehicle": "swivel_chair", "chance": 100, "rotation": [ 0, 90, 180, 270 ] },
+      "²": { "vehicle": "trolley", "chance": 70, "rotation": [ 0, 90, 180, 270 ] },
+      "→": { "vehicle": "helicopters", "chance": 20, "rotation": [ 0, 90, 180, 270 ] },
+      "n": { "vehicle": "inflatable_boat", "chance": 80 }
+    },
+    "vendingmachines": { "D": { "item_group": "vending_drink_items" }, "F": { "item_group": "vending_food_items" } },
+    "monster": {
+      "i": { "monster": "mon_zombie_swimmer_base", "chance": 30 },
+      "↨": { "monster": "mon_gas_zombie", "chance": 5 },
+      "←": { "monster": "mon_zombie_scientist", "chance": 70 }
+    }
+  },
+  {
+    "id": "lubricant",
+    "type": "item_group",
+    "items": [
+      { "item": "motor_oil", "container-item": "metal_tank", "charges-min": 2000, "charges-max": 60000, "prob": 50 },
+      { "item": "motor_oil", "container-item": "jerrycan_big", "charges-min": 0, "charges-max": 20000, "prob": 30 },
+      { "item": "metal_tank", "prob": 20 }
+    ]
+  },
+  {
+    "id": "oil_drums",
+    "type": "item_group",
+    "items": [
+      { "item": "crude_oil", "container-item": "55gal_drum", "charges-min": 180000, "charges-max": 200000, "prob": 60 },
+      { "item": "55gal_drum", "prob": 30 }
+    ]
+  }
+]
diff --git a/data/json/materials.json b/data/json/materials.json
index 5ef2c1e77fd54..7bd62fe59b9cd 100644
--- a/data/json/materials.json
+++ b/data/json/materials.json
@@ -1175,6 +1175,17 @@
       "explosion_data": { "chance_hot": 5, "chance_cold": 10, "factor": 0.2, "fiery": true, "size_factor": 0.1 }
     }
   },
+  {
+    "type": "material",
+    "id": "crude_oil",
+    "density": 0.8,
+    "name": "Crude oil",
+    "copy-from": "hydrocarbons",
+    "fuel_data": {
+      "energy": "38000 kJ",
+      "explosion_data": { "chance_hot": 5, "chance_cold": 10, "factor": 0.2, "fiery": true, "size_factor": 0.1 }
+    }
+  },
   {
     "type": "material",
     "id": "iflesh",
diff --git a/data/json/monstergroups/zombies.json b/data/json/monstergroups/zombies.json
index 327dec471202f..efe80390d9543 100644
--- a/data/json/monstergroups/zombies.json
+++ b/data/json/monstergroups/zombies.json
@@ -491,6 +491,33 @@
       { "monster": "mon_zombie_tough", "weight": 25, "cost_multiplier": 0 }
     ]
   },
+  {
+    "type": "monstergroup",
+    "name": "GROUP_OIL_PLATFORM",
+    "monsters": [
+      { "monster": "mon_zombie_technician", "weight": 60 },
+      { "monster": "mon_zombie", "weight": 90 },
+      { "monster": "mon_zombie_fireman", "weight": 10 },
+      { "monster": "mon_zombie_medical", "weight": 10 },
+      { "monster": "mon_zombie_fat", "weight": 20 },
+      { "monster": "mon_zombie_crawler", "weight": 12 },
+      { "monster": "mon_feral_human_pipe", "weight": 6, "cost_multiplier": 2 },
+      { "monster": "mon_feral_human_crowbar", "weight": 6, "cost_multiplier": 2 },
+      { "monster": "mon_feral_human_axe", "weight": 4, "cost_multiplier": 4, "starts": "86 hours" },
+      { "monster": "mon_zombie_brainless", "weight": 12 },
+      { "monster": "mon_feral_human_tool", "weight": 6, "cost_multiplier": 3 },
+      { "monster": "mon_feral_sailor_wrench", "weight": 6, "cost_multiplier": 3, "starts": "86 hours" },
+      { "monster": "mon_feral_sailor_mop", "weight": 6, "cost_multiplier": 3 },
+      { "monster": "mon_feral_sailor_axe", "weight": 4, "cost_multiplier": 4, "starts": "540 hours" },
+      { "monster": "mon_feral_sailor_lug_wrench", "weight": 6, "cost_multiplier": 3, "starts": "86 hours" },
+      { "monster": "mon_zombie_static", "weight": 4, "cost_multiplier": 2, "starts": "86 hours" },
+      { "monster": "mon_zombie_swimmer_base", "weight": 40 },
+      { "monster": "mon_zombie_survivor", "weight": 4, "cost_multiplier": 5, "starts": "270 hours" },
+      { "monster": "mon_zombie_survivor_elite", "weight": 2, "cost_multiplier": 5, "starts": "540 hours" },
+      { "monster": "mon_zombie_runner", "weight": 20, "cost_multiplier": 2 },
+      { "monster": "mon_gas_zombie", "weight": 1, "cost_multiplier": 6, "starts": "540 hours" }
+    ]
+  },
   {
     "type": "monstergroup",
     "name": "GROUP_CHURCH_ZOMBIE",
diff --git a/data/json/overmap/overmap_special/oil_platform.json b/data/json/overmap/overmap_special/oil_platform.json
new file mode 100644
index 0000000000000..1c77bbf07f65b
--- /dev/null
+++ b/data/json/overmap/overmap_special/oil_platform.json
@@ -0,0 +1,216 @@
+[
+  {
+    "type": "overmap_special",
+    "id": "oil_platform",
+    "overmaps": [
+      { "point": [ 0, 0, 0 ], "overmap": "oil_platform_1a_0_north" },
+      { "point": [ 1, 0, 0 ], "overmap": "oil_platform_1b_0_north" },
+      { "point": [ 2, 0, 0 ], "overmap": "oil_platform_1c_0_north" },
+      { "point": [ 0, 1, 0 ], "overmap": "oil_platform_2a_0_north" },
+      { "point": [ 1, 1, 0 ], "overmap": "oil_platform_2b_0_north" },
+      { "point": [ 2, 1, 0 ], "overmap": "oil_platform_2c_0_north" },
+      { "point": [ 0, 2, 0 ], "overmap": "oil_platform_3a_0_north" },
+      { "point": [ 1, 2, 0 ], "overmap": "oil_platform_3b_0_north" },
+      { "point": [ 2, 2, 0 ], "overmap": "oil_platform_3c_0_north" },
+      { "point": [ 0, 3, 0 ], "overmap": "oil_platform_4a_0_north" },
+      { "point": [ 1, 3, 0 ], "overmap": "oil_platform_4b_0_north" },
+      { "point": [ 2, 3, 0 ], "overmap": "oil_platform_4c_0_north" },
+      { "point": [ 0, 0, 1 ], "overmap": "oil_platform_1a_1_north" },
+      { "point": [ 1, 0, 1 ], "overmap": "oil_platform_1b_1_north" },
+      { "point": [ 2, 0, 1 ], "overmap": "oil_platform_1c_1_north" },
+      { "point": [ 0, 1, 1 ], "overmap": "oil_platform_2a_1_north" },
+      { "point": [ 1, 1, 1 ], "overmap": "oil_platform_2b_1_north" },
+      { "point": [ 2, 1, 1 ], "overmap": "oil_platform_2c_1_north" },
+      { "point": [ 0, 2, 1 ], "overmap": "oil_platform_3a_1_north" },
+      { "point": [ 1, 2, 1 ], "overmap": "oil_platform_3b_1_north" },
+      { "point": [ 2, 2, 1 ], "overmap": "oil_platform_3c_1_north" },
+      { "point": [ 0, 3, 1 ], "overmap": "oil_platform_4a_1_north" },
+      { "point": [ 1, 3, 1 ], "overmap": "oil_platform_4b_1_north" },
+      { "point": [ 2, 3, 1 ], "overmap": "oil_platform_4c_1_north" },
+      { "point": [ 0, 0, 2 ], "overmap": "oil_platform_1a_2_north" },
+      { "point": [ 1, 0, 2 ], "overmap": "oil_platform_1b_2_north" },
+      { "point": [ 2, 0, 2 ], "overmap": "oil_platform_1c_2_north" },
+      { "point": [ 0, 1, 2 ], "overmap": "oil_platform_2a_2_north" },
+      { "point": [ 1, 1, 2 ], "overmap": "oil_platform_2b_2_north" },
+      { "point": [ 2, 1, 2 ], "overmap": "oil_platform_2c_2_north" },
+      { "point": [ 0, 2, 2 ], "overmap": "oil_platform_3a_2_north" },
+      { "point": [ 1, 2, 2 ], "overmap": "oil_platform_3b_2_north" },
+      { "point": [ 2, 2, 2 ], "overmap": "oil_platform_3c_2_north" },
+      { "point": [ 0, 3, 2 ], "overmap": "oil_platform_4a_2_north" },
+      { "point": [ 1, 3, 2 ], "overmap": "oil_platform_4b_2_north" },
+      { "point": [ 2, 3, 2 ], "overmap": "oil_platform_4c_2_north" },
+      { "point": [ 0, 0, 3 ], "overmap": "oil_platform_1a_3_north" },
+      { "point": [ 1, 0, 3 ], "overmap": "oil_platform_1b_3_north" },
+      { "point": [ 2, 0, 3 ], "overmap": "oil_platform_1c_3_north" },
+      { "point": [ 0, 1, 3 ], "overmap": "oil_platform_2a_3_north" },
+      { "point": [ 1, 1, 3 ], "overmap": "oil_platform_2b_3_north" },
+      { "point": [ 2, 1, 3 ], "overmap": "oil_platform_2c_3_north" },
+      { "point": [ 0, 2, 3 ], "overmap": "oil_platform_3a_3_north" },
+      { "point": [ 1, 2, 3 ], "overmap": "oil_platform_3b_3_north" },
+      { "point": [ 2, 2, 3 ], "overmap": "oil_platform_3c_3_north" },
+      { "point": [ 0, 3, 3 ], "overmap": "oil_platform_4a_3_north" },
+      { "point": [ 1, 3, 3 ], "overmap": "oil_platform_4b_3_north" },
+      { "point": [ 2, 3, 3 ], "overmap": "oil_platform_4c_3_north" },
+      { "point": [ 0, 0, 4 ], "overmap": "oil_platform_1a_4_north" },
+      { "point": [ 1, 0, 4 ], "overmap": "oil_platform_1b_4_north" },
+      { "point": [ 2, 0, 4 ], "overmap": "oil_platform_1c_4_north" },
+      { "point": [ 0, 1, 4 ], "overmap": "oil_platform_2a_4_north" },
+      { "point": [ 1, 1, 4 ], "overmap": "oil_platform_2b_4_north" },
+      { "point": [ 2, 1, 4 ], "overmap": "oil_platform_2c_4_north" },
+      { "point": [ 0, 2, 4 ], "overmap": "oil_platform_3a_4_north" },
+      { "point": [ 1, 2, 4 ], "overmap": "oil_platform_3b_4_north" },
+      { "point": [ 2, 2, 4 ], "overmap": "oil_platform_3c_4_north" },
+      { "point": [ 0, 3, 4 ], "overmap": "oil_platform_4a_4_north" },
+      { "point": [ 1, 3, 4 ], "overmap": "oil_platform_4b_4_north" },
+      { "point": [ 2, 3, 4 ], "overmap": "oil_platform_4c_4_north" },
+      { "point": [ 0, 0, 5 ], "overmap": "oil_platform_1a_5_north" },
+      { "point": [ 1, 0, 5 ], "overmap": "oil_platform_1b_5_north" },
+      { "point": [ 2, 0, 5 ], "overmap": "oil_platform_1c_5_north" },
+      { "point": [ 0, 1, 5 ], "overmap": "oil_platform_2a_5_north" },
+      { "point": [ 1, 1, 5 ], "overmap": "oil_platform_2b_5_north" },
+      { "point": [ 2, 1, 5 ], "overmap": "oil_platform_2c_5_north" },
+      { "point": [ 0, 2, 5 ], "overmap": "oil_platform_3a_5_north" },
+      { "point": [ 1, 2, 5 ], "overmap": "oil_platform_3b_5_north" },
+      { "point": [ 2, 2, 5 ], "overmap": "oil_platform_3c_5_north" },
+      { "point": [ 0, 3, 5 ], "overmap": "oil_platform_4a_5_north" },
+      { "point": [ 1, 3, 5 ], "overmap": "oil_platform_4b_5_north" },
+      { "point": [ 2, 3, 5 ], "overmap": "oil_platform_4c_5_north" },
+      { "point": [ 0, 0, 6 ], "overmap": "oil_platform_1a_6_north" },
+      { "point": [ 1, 0, 6 ], "overmap": "oil_platform_1b_6_north" },
+      { "point": [ 2, 0, 6 ], "overmap": "oil_platform_1c_6_north" },
+      { "point": [ 0, 1, 6 ], "overmap": "oil_platform_2a_6_north" },
+      { "point": [ 1, 1, 6 ], "overmap": "oil_platform_2b_6_north" },
+      { "point": [ 2, 1, 6 ], "overmap": "oil_platform_2c_6_north" },
+      { "point": [ 0, 2, 6 ], "overmap": "oil_platform_3a_6_north" },
+      { "point": [ 1, 2, 6 ], "overmap": "oil_platform_3b_6_north" },
+      { "point": [ 2, 2, 6 ], "overmap": "oil_platform_3c_6_north" },
+      { "point": [ 0, 3, 6 ], "overmap": "oil_platform_4a_6_north" },
+      { "point": [ 1, 3, 6 ], "overmap": "oil_platform_4b_6_north" },
+      { "point": [ 2, 3, 6 ], "overmap": "oil_platform_4c_6_north" },
+      { "point": [ 0, 0, 7 ], "overmap": "oil_platform_1a_7_north" },
+      { "point": [ 1, 0, 7 ], "overmap": "oil_platform_1b_7_north" },
+      { "point": [ 2, 0, 7 ], "overmap": "oil_platform_1c_7_north" },
+      { "point": [ 0, 1, 7 ], "overmap": "oil_platform_2a_7_north" },
+      { "point": [ 1, 1, 7 ], "overmap": "oil_platform_2b_7_north" },
+      { "point": [ 2, 1, 7 ], "overmap": "oil_platform_2c_7_north" },
+      { "point": [ 0, 2, 7 ], "overmap": "oil_platform_3a_7_north" },
+      { "point": [ 1, 2, 7 ], "overmap": "oil_platform_3b_7_north" },
+      { "point": [ 2, 2, 7 ], "overmap": "oil_platform_3c_7_north" },
+      { "point": [ 0, 3, 7 ], "overmap": "oil_platform_4a_7_north" },
+      { "point": [ 1, 3, 7 ], "overmap": "oil_platform_4b_7_north" },
+      { "point": [ 2, 3, 7 ], "overmap": "oil_platform_4c_7_north" },
+      { "point": [ 0, 0, -1 ], "overmap": "oil_platform_1a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 0, -1 ], "overmap": "oil_platform_1b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 0, -1 ], "overmap": "oil_platform_1c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 1, -1 ], "overmap": "oil_platform_2a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 1, -1 ], "overmap": "oil_platform_2b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 1, -1 ], "overmap": "oil_platform_2c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 2, -1 ], "overmap": "oil_platform_3a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 2, -1 ], "overmap": "oil_platform_3b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 2, -1 ], "overmap": "oil_platform_3c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 3, -1 ], "overmap": "oil_platform_4a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 3, -1 ], "overmap": "oil_platform_4b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 3, -1 ], "overmap": "oil_platform_4c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 0, -2 ], "overmap": "oil_platform_1a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 0, -2 ], "overmap": "oil_platform_1b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 0, -2 ], "overmap": "oil_platform_1c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 1, -2 ], "overmap": "oil_platform_2a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 1, -2 ], "overmap": "oil_platform_2b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 1, -2 ], "overmap": "oil_platform_2c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 2, -2 ], "overmap": "oil_platform_3a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 2, -2 ], "overmap": "oil_platform_3b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 2, -2 ], "overmap": "oil_platform_3c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 3, -2 ], "overmap": "oil_platform_4a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 3, -2 ], "overmap": "oil_platform_4b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 3, -2 ], "overmap": "oil_platform_4c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 0, -3 ], "overmap": "oil_platform_1a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 0, -3 ], "overmap": "oil_platform_1b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 0, -3 ], "overmap": "oil_platform_1c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 1, -3 ], "overmap": "oil_platform_2a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 1, -3 ], "overmap": "oil_platform_2b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 1, -3 ], "overmap": "oil_platform_2c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 2, -3 ], "overmap": "oil_platform_3a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 2, -3 ], "overmap": "oil_platform_3b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 2, -3 ], "overmap": "oil_platform_3c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 3, -3 ], "overmap": "oil_platform_4a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 3, -3 ], "overmap": "oil_platform_4b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 3, -3 ], "overmap": "oil_platform_4c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 0, -4 ], "overmap": "oil_platform_1a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 0, -4 ], "overmap": "oil_platform_1b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 0, -4 ], "overmap": "oil_platform_1c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 1, -4 ], "overmap": "oil_platform_2a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 1, -4 ], "overmap": "oil_platform_2b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 1, -4 ], "overmap": "oil_platform_2c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 2, -4 ], "overmap": "oil_platform_3a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 2, -4 ], "overmap": "oil_platform_3b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 2, -4 ], "overmap": "oil_platform_3c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 3, -4 ], "overmap": "oil_platform_4a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 3, -4 ], "overmap": "oil_platform_4b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 3, -4 ], "overmap": "oil_platform_4c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 0, -5 ], "overmap": "oil_platform_1a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 0, -5 ], "overmap": "oil_platform_1b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 0, -5 ], "overmap": "oil_platform_1c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 1, -5 ], "overmap": "oil_platform_2a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 1, -5 ], "overmap": "oil_platform_2b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 1, -5 ], "overmap": "oil_platform_2c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 2, -5 ], "overmap": "oil_platform_3a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 2, -5 ], "overmap": "oil_platform_3b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 2, -5 ], "overmap": "oil_platform_3c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 3, -5 ], "overmap": "oil_platform_4a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 3, -5 ], "overmap": "oil_platform_4b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 3, -5 ], "overmap": "oil_platform_4c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 0, -6 ], "overmap": "oil_platform_1a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 0, -6 ], "overmap": "oil_platform_1b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 0, -6 ], "overmap": "oil_platform_1c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 1, -6 ], "overmap": "oil_platform_2a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 1, -6 ], "overmap": "oil_platform_2b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 1, -6 ], "overmap": "oil_platform_2c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 2, -6 ], "overmap": "oil_platform_3a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 2, -6 ], "overmap": "oil_platform_3b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 2, -6 ], "overmap": "oil_platform_3c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 3, -6 ], "overmap": "oil_platform_4a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 3, -6 ], "overmap": "oil_platform_4b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 3, -6 ], "overmap": "oil_platform_4c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 0, -7 ], "overmap": "oil_platform_1a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 0, -7 ], "overmap": "oil_platform_1b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 0, -7 ], "overmap": "oil_platform_1c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 1, -7 ], "overmap": "oil_platform_2a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 1, -7 ], "overmap": "oil_platform_2b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 1, -7 ], "overmap": "oil_platform_2c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 2, -7 ], "overmap": "oil_platform_3a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 2, -7 ], "overmap": "oil_platform_3b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 2, -7 ], "overmap": "oil_platform_3c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 3, -7 ], "overmap": "oil_platform_4a_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 3, -7 ], "overmap": "oil_platform_4b_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 3, -7 ], "overmap": "oil_platform_4c_uw_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 0, -8 ], "overmap": "oil_platform_1a_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 0, -8 ], "overmap": "oil_platform_1b_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 0, -8 ], "overmap": "oil_platform_1c_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 1, -8 ], "overmap": "oil_platform_2a_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 1, -8 ], "overmap": "oil_platform_2b_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 1, -8 ], "overmap": "oil_platform_2c_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 2, -8 ], "overmap": "oil_platform_3a_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 2, -8 ], "overmap": "oil_platform_3b_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 2, -8 ], "overmap": "oil_platform_3c_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 3, -8 ], "overmap": "oil_platform_4a_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 1, 3, -8 ], "overmap": "oil_platform_4b_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 2, 3, -8 ], "overmap": "oil_platform_4c_z-8_north", "locations": [ "ocean_water_cube" ] },
+      { "point": [ 0, 0, -9 ], "overmap": "oil_platform_1a_z-9_north", "locations": [ "ocean_bed" ] },
+      { "point": [ 1, 0, -9 ], "overmap": "oil_platform_1b_z-9_north", "locations": [ "ocean_bed" ] },
+      { "point": [ 2, 0, -9 ], "overmap": "oil_platform_1c_z-9_north", "locations": [ "ocean_bed" ] },
+      { "point": [ 0, 1, -9 ], "overmap": "oil_platform_2a_z-9_north", "locations": [ "ocean_bed" ] },
+      { "point": [ 1, 1, -9 ], "overmap": "oil_platform_2b_z-9_north", "locations": [ "ocean_bed" ] },
+      { "point": [ 2, 1, -9 ], "overmap": "oil_platform_2c_z-9_north", "locations": [ "ocean_bed" ] },
+      { "point": [ 0, 2, -9 ], "overmap": "oil_platform_3a_z-9_north", "locations": [ "ocean_bed" ] },
+      { "point": [ 1, 2, -9 ], "overmap": "oil_platform_3b_z-9_north", "locations": [ "ocean_bed" ] },
+      { "point": [ 2, 2, -9 ], "overmap": "oil_platform_3c_z-9_north", "locations": [ "ocean_bed" ] },
+      { "point": [ 0, 3, -9 ], "overmap": "oil_platform_4a_z-9_north", "locations": [ "ocean_bed" ] },
+      { "point": [ 1, 3, -9 ], "overmap": "oil_platform_4b_z-9_north", "locations": [ "ocean_bed" ] },
+      { "point": [ 2, 3, -9 ], "overmap": "oil_platform_4c_z-9_north", "locations": [ "ocean_bed" ] }
+    ],
+    "city_distance": [ 150, 1000 ],
+    "locations": [ "ocean_surface" ],
+    "occurrences": [ 5, 100 ],
+    "flags": [ "MAN_MADE", "OCEAN", "UNIQUE" ]
+  }
+]
diff --git a/data/json/overmap/overmap_terrain/overmap_terrain_oil_platform.json b/data/json/overmap/overmap_terrain/overmap_terrain_oil_platform.json
new file mode 100644
index 0000000000000..94713b2ebe867
--- /dev/null
+++ b/data/json/overmap/overmap_terrain/overmap_terrain_oil_platform.json
@@ -0,0 +1,168 @@
+[
+  {
+    "type": "overmap_terrain",
+    "id": [
+      "oil_platform_1a_2",
+      "oil_platform_1b_2",
+      "oil_platform_1c_2",
+      "oil_platform_2a_2",
+      "oil_platform_2b_2",
+      "oil_platform_2c_2",
+      "oil_platform_3a_2",
+      "oil_platform_3b_2",
+      "oil_platform_3c_2",
+      "oil_platform_4a_2",
+      "oil_platform_4b_2",
+      "oil_platform_4c_2",
+      "oil_platform_1a_3",
+      "oil_platform_1b_3",
+      "oil_platform_1c_3",
+      "oil_platform_4a_3",
+      "oil_platform_4b_3",
+      "oil_platform_4c_3",
+      "oil_platform_1a_4",
+      "oil_platform_1b_4",
+      "oil_platform_1c_4",
+      "oil_platform_4a_4",
+      "oil_platform_4b_4",
+      "oil_platform_4c_4",
+      "oil_platform_1a_5",
+      "oil_platform_1b_5",
+      "oil_platform_1c_5",
+      "oil_platform_3a_5",
+      "oil_platform_3b_5",
+      "oil_platform_3c_5",
+      "oil_platform_4a_5",
+      "oil_platform_4b_5",
+      "oil_platform_4c_5"
+    ],
+    "name": "oil platform",
+    "sym": "O",
+    "color": "red",
+    "see_cost": 5,
+    "spawns": { "group": "GROUP_OIL_PLATFORM", "population": [ 15, 20 ], "chance": 100 },
+    "flags": [ "RISK_HIGH", "OCEAN" ]
+  },
+  {
+    "type": "overmap_terrain",
+    "//": "Dorms area",
+    "id": [
+      "oil_platform_3a_3",
+      "oil_platform_3b_3",
+      "oil_platform_3c_3",
+      "oil_platform_3a_4",
+      "oil_platform_3b_4",
+      "oil_platform_3c_4"
+    ],
+    "name": "oil platform",
+    "sym": "O",
+    "color": "red",
+    "see_cost": 5,
+    "spawns": { "group": "GROUP_OIL_PLATFORM", "population": [ 25, 35 ], "chance": 100 },
+    "flags": [ "RISK_HIGH", "OCEAN" ]
+  },
+  {
+    "type": "overmap_terrain",
+    "//": "Open air, lower and underwater levels",
+    "id": [
+      "oil_platform_1a_0",
+      "oil_platform_1b_0",
+      "oil_platform_1c_0",
+      "oil_platform_2a_0",
+      "oil_platform_2b_0",
+      "oil_platform_2c_0",
+      "oil_platform_3a_0",
+      "oil_platform_3b_0",
+      "oil_platform_3c_0",
+      "oil_platform_4a_0",
+      "oil_platform_4b_0",
+      "oil_platform_4c_0",
+      "oil_platform_1a_1",
+      "oil_platform_1b_1",
+      "oil_platform_1c_1",
+      "oil_platform_2a_1",
+      "oil_platform_2b_1",
+      "oil_platform_2c_1",
+      "oil_platform_3a_1",
+      "oil_platform_3b_1",
+      "oil_platform_3c_1",
+      "oil_platform_4a_1",
+      "oil_platform_4b_1",
+      "oil_platform_4c_1",
+      "oil_platform_2a_3",
+      "oil_platform_2b_3",
+      "oil_platform_2c_3",
+      "oil_platform_2a_4",
+      "oil_platform_2b_4",
+      "oil_platform_2c_4",
+      "oil_platform_2a_5",
+      "oil_platform_2b_5",
+      "oil_platform_2c_5",
+      "oil_platform_1a_6",
+      "oil_platform_1b_6",
+      "oil_platform_1c_6",
+      "oil_platform_2a_6",
+      "oil_platform_2b_6",
+      "oil_platform_2c_6",
+      "oil_platform_3a_6",
+      "oil_platform_3b_6",
+      "oil_platform_3c_6",
+      "oil_platform_4a_6",
+      "oil_platform_4b_6",
+      "oil_platform_4c_6",
+      "oil_platform_1a_7",
+      "oil_platform_1b_7",
+      "oil_platform_1c_7",
+      "oil_platform_2a_7",
+      "oil_platform_2b_7",
+      "oil_platform_2c_7",
+      "oil_platform_3a_7",
+      "oil_platform_3b_7",
+      "oil_platform_3c_7",
+      "oil_platform_4a_7",
+      "oil_platform_4b_7",
+      "oil_platform_4c_7",
+      "oil_platform_1a_uw",
+      "oil_platform_1b_uw",
+      "oil_platform_1c_uw",
+      "oil_platform_2a_uw",
+      "oil_platform_2b_uw",
+      "oil_platform_2c_uw",
+      "oil_platform_3a_uw",
+      "oil_platform_3b_uw",
+      "oil_platform_3c_uw",
+      "oil_platform_4a_uw",
+      "oil_platform_4b_uw",
+      "oil_platform_4c_uw",
+      "oil_platform_1a_z-8",
+      "oil_platform_1b_z-8",
+      "oil_platform_1c_z-8",
+      "oil_platform_2a_z-8",
+      "oil_platform_2b_z-8",
+      "oil_platform_2c_z-8",
+      "oil_platform_3a_z-8",
+      "oil_platform_3b_z-8",
+      "oil_platform_3c_z-8",
+      "oil_platform_4a_z-8",
+      "oil_platform_4b_z-8",
+      "oil_platform_4c_z-8",
+      "oil_platform_1a_z-9",
+      "oil_platform_1b_z-9",
+      "oil_platform_1c_z-9",
+      "oil_platform_2a_z-9",
+      "oil_platform_2b_z-9",
+      "oil_platform_2c_z-9",
+      "oil_platform_3a_z-9",
+      "oil_platform_3b_z-9",
+      "oil_platform_3c_z-9",
+      "oil_platform_4a_z-9",
+      "oil_platform_4b_z-9",
+      "oil_platform_4c_z-9"
+    ],
+    "name": "oil platform",
+    "sym": "O",
+    "color": "red",
+    "see_cost": 5,
+    "flags": [ "RISK_HIGH", "OCEAN" ]
+  }
+]
diff --git a/data/mods/TEST_DATA/overmap_terrain_coverage_test/overmap_terrain_coverage_whitelist.json b/data/mods/TEST_DATA/overmap_terrain_coverage_test/overmap_terrain_coverage_whitelist.json
index b3203493b6156..355311be67aa7 100644
--- a/data/mods/TEST_DATA/overmap_terrain_coverage_test/overmap_terrain_coverage_whitelist.json
+++ b/data/mods/TEST_DATA/overmap_terrain_coverage_test/overmap_terrain_coverage_whitelist.json
@@ -64,7 +64,139 @@
       "unvitrified_farm_1",
       "unvitrified_farm_2",
       "unvitrified_farm_neg_1",
-      "unvitrified_orchard"
+      "unvitrified_orchard",
+      "oil_platform_1a_2",
+      "oil_platform_1b_2",
+      "oil_platform_1c_2",
+      "oil_platform_2a_2",
+      "oil_platform_2b_2",
+      "oil_platform_2c_2",
+      "oil_platform_3a_2",
+      "oil_platform_3b_2",
+      "oil_platform_3c_2",
+      "oil_platform_4a_2",
+      "oil_platform_4b_2",
+      "oil_platform_4c_2",
+      "oil_platform_1a_3",
+      "oil_platform_1b_3",
+      "oil_platform_1c_3",
+      "oil_platform_4a_3",
+      "oil_platform_4b_3",
+      "oil_platform_4c_3",
+      "oil_platform_1a_4",
+      "oil_platform_1b_4",
+      "oil_platform_1c_4",
+      "oil_platform_4a_4",
+      "oil_platform_4b_4",
+      "oil_platform_4c_4",
+      "oil_platform_1a_5",
+      "oil_platform_1b_5",
+      "oil_platform_1c_5",
+      "oil_platform_3a_5",
+      "oil_platform_3b_5",
+      "oil_platform_3c_5",
+      "oil_platform_4a_5",
+      "oil_platform_4b_5",
+      "oil_platform_4c_5",
+      "oil_platform_3a_3",
+      "oil_platform_3b_3",
+      "oil_platform_3c_3",
+      "oil_platform_3a_4",
+      "oil_platform_3b_4",
+      "oil_platform_3c_4",
+      "oil_platform_1a_0",
+      "oil_platform_1b_0",
+      "oil_platform_1c_0",
+      "oil_platform_2a_0",
+      "oil_platform_2b_0",
+      "oil_platform_2c_0",
+      "oil_platform_3a_0",
+      "oil_platform_3b_0",
+      "oil_platform_3c_0",
+      "oil_platform_4a_0",
+      "oil_platform_4b_0",
+      "oil_platform_4c_0",
+      "oil_platform_1a_1",
+      "oil_platform_1b_1",
+      "oil_platform_1c_1",
+      "oil_platform_2a_1",
+      "oil_platform_2b_1",
+      "oil_platform_2c_1",
+      "oil_platform_3a_1",
+      "oil_platform_3b_1",
+      "oil_platform_3c_1",
+      "oil_platform_4a_1",
+      "oil_platform_4b_1",
+      "oil_platform_4c_1",
+      "oil_platform_2a_3",
+      "oil_platform_2b_3",
+      "oil_platform_2c_3",
+      "oil_platform_2a_4",
+      "oil_platform_2b_4",
+      "oil_platform_2c_4",
+      "oil_platform_2a_5",
+      "oil_platform_2b_5",
+      "oil_platform_2c_5",
+      "oil_platform_1a_6",
+      "oil_platform_1b_6",
+      "oil_platform_1c_6",
+      "oil_platform_2a_6",
+      "oil_platform_2b_6",
+      "oil_platform_2c_6",
+      "oil_platform_3a_6",
+      "oil_platform_3b_6",
+      "oil_platform_3c_6",
+      "oil_platform_4a_6",
+      "oil_platform_4b_6",
+      "oil_platform_4c_6",
+      "oil_platform_1a_7",
+      "oil_platform_1b_7",
+      "oil_platform_1c_7",
+      "oil_platform_2a_7",
+      "oil_platform_2b_7",
+      "oil_platform_2c_7",
+      "oil_platform_3a_7",
+      "oil_platform_3b_7",
+      "oil_platform_3c_7",
+      "oil_platform_4a_7",
+      "oil_platform_4b_7",
+      "oil_platform_4c_7",
+      "oil_platform_1a_uw",
+      "oil_platform_1b_uw",
+      "oil_platform_1c_uw",
+      "oil_platform_2a_uw",
+      "oil_platform_2b_uw",
+      "oil_platform_2c_uw",
+      "oil_platform_3a_uw",
+      "oil_platform_3b_uw",
+      "oil_platform_3c_uw",
+      "oil_platform_4a_uw",
+      "oil_platform_4b_uw",
+      "oil_platform_4c_uw",
+      "oil_platform_1a_z-8",
+      "oil_platform_1b_z-8",
+      "oil_platform_1c_z-8",
+      "oil_platform_2a_z-8",
+      "oil_platform_2b_z-8",
+      "oil_platform_2c_z-8",
+      "oil_platform_3a_z-8",
+      "oil_platform_3b_z-8",
+      "oil_platform_3c_z-8",
+      "oil_platform_4a_z-8",
+      "oil_platform_4b_z-8",
+      "oil_platform_4c_z-8",
+      "oil_platform_1a_z-9",
+      "oil_platform_1b_z-9",
+      "oil_platform_1c_z-9",
+      "oil_platform_2a_z-9",
+      "oil_platform_2b_z-9",
+      "oil_platform_2c_z-9",
+      "oil_platform_3a_z-9",
+      "oil_platform_3b_z-9",
+      "oil_platform_3c_z-9",
+      "oil_platform_4a_z-9",
+      "oil_platform_4b_z-9",
+      "oil_platform_4c_z-9"
     ]
   }
 ]