Map the external trade.

[tjoneslo]

Request from users: It would be interesting to capture the trade flows at the subsector level. Have a (simple) map which shows the external trade between subsectors and/or sectors.

[CyberiaResurrection]

Off top of my head, to make this work you'd need to split up what's currently tracked as external-to-subsector trade into:
Inter-sector external trade (tradeExt)
Intra-sector external trade (tradeInt)

Intra-subsector + intra-sector subsector trade (and pax) should be at least bilaterally balanced against the sector's internal totals, if not multilaterally.
Likewise, total of inter-sector subsector trade should be balanced against sector's external trade.

[tjoneslo]

The question here isn't do we have the data (we do), it's can you draw a map with arrows and numbers showing where the trade goes to comes from.

Note also: While the going into and out of a give subsector is balanced, where it goes isn't. From Subsector F, you can have trade going to A, B, C, E, G, I, J, K (8 different adjacent subsectors). The trade to/from each of those subsectors won't be the same for each subsector, And that's the interesting part.