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osm2geojson

Test package

Parse OSM and Overpass JSON with python. This library is under development!

Usage

Install this package with pip:

$ pip install osm2geojson

If you want to convert OSM xml or Overpass json/xml to Geojson you can import this lib and use one of 4 methods:

  • json2shapes(dict json_from_overpass) - to convert Overpass json to *Shape-objects
  • xml2shapes(str xml_from_osm) - to convert OSM xml or Overpass xml to *Shape-objects
  • json2geojson(dict json_from_overpass) - to convert Overpass json to Geojson
  • xml2geojson(str xml_from_osm) - to convert OSM xml or Overpass xml to Geojson

Additional parameters for all functions:

  • filter_used_refs - (default: True) defines geometry filtration strategy (will return all geometry if set as False)
  • log_level - (default: 'ERROR') controls logging level (will print all logs if set as 'INFO'). More details here
  • area_keys - (default: None) defines which keys and values of an area should be saved from the list of OSM tags, see areaKeys.json for the defaults
  • polygon_features - (default: None) defines a whitelist/blacklist of features to be included in resulting polygons, see polygon-features.json for the defaults
  • raise_on_failure - (default: False) controls whether to throw an exception when geometry generation fails

Other handy methods:

  • overpass_call(str query) - runs query to overpass-api.de server (retries 5 times in case of error).
  • shape_to_feature(Shape shape, dict properties) - Converts Shape-object to GeoJSON with passed properties.

*Shape-object - for convenience created simple dict to save Shapely object (geometry) and OSM-properties. Structure of this object:

shape_obj = {
    'shape': Point | LineString | Polygon ...,
    'properties': {
        'type': 'relation' | 'node' ...,
        'tags': { ... },
        ...
    }
}

After installing via pip, the module may also be used as a argparse-based command-line script. Either use the script name directly or call Python with the -m option and the package name:

osm2geojson --help
python3 -m osm2geojson --help

Examples

Convert OSM-xml to Geojson:

import codecs
import osm2geojson

with codecs.open('file.osm', 'r', encoding='utf-8') as data:
    xml = data.read()

geojson = osm2geojson.xml2geojson(xml, filter_used_refs=False, log_level='INFO')
# >> { "type": "FeatureCollection", "features": [ ... ] }

Convert OSM-json to Shape-objects:

import codecs
import osm2geojson

with codecs.open('file.json', 'r', encoding='utf-8') as data:
    json = data.read()

shapes_with_props = osm2geojson.json2shapes(json)
# >> [ { "shape": <Shapely-object>, "properties": {...} }, ... ]

Development

Clone project with submodules

$ git clone --recurse-submodules https://github.com/aspectumapp/osm2geojson.git

Setup package

$ python setup.py develop

Run tests

$ python -m unittest tests

Run single test

$ python tests/main.py TestOsm2GeoJsonMethods.test_barrier_wall

Update osm-polygon-features to last version (if you want last version)

$ ./update-osm-polygon-features.sh

ToDo

  • Add tests and examples for cli tool
  • Add actions related to cli tool (more info #32 (comment))