osm-polygons

City outline polygons

OpenStreetMap offers geo data in raw data form. For building services you usually have to preprocess the data. This project takes OSM's raw data, extracts all administrative boundaries and converts them as polygons.

GeoJSON

Here's an example of one of the exported GeoJSON objects:

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {
        "name": "Palling",
        "boundary": "administrative",
        "wikidata": "Q262325",
        "wikipedia": "de:Palling",
        "admin_level": "8",
        "de:regionalschluessel": "091890134134",
        "TMC:cid_58:tabcd_1:Class": "Area",
        "TMC:cid_58:tabcd_1:LCLversion": "8.00",
        "TMC:cid_58:tabcd_1:LocationCode": "4457",
        "de:amtlicher_gemeindeschluessel": "09189134"
      },
      "geometry": {
        "type": "Polygon",
        "coordinates":[[[12.5950766,47.9703637],[12.5953607,47.9727103],[12.6019791,47.9734364],[12.6054816,47.9756447],[12.6051771,47.9866313],[12.6019101,47.9920364],[12.6015149,48.0000915],[12.6038957,48.0018881],[12.6037128,48.0075969],[12.6080557,48.008038],[12.6067195,48.0110004],[12.6028389,48.0123523],[12.6106511,48.0155409],[12.6186272,48.0264337],[12.6133034,48.0266815],[12.6128961,48.0335542],[12.6155784,48.0330894],[12.6163547,48.0450822],[12.6224712,48.0447456],[12.6224326,48.0468012],[12.6300164,48.0474926],[12.6322431,48.049497],[12.6424822,48.0472457],[12.6451302,48.0475784],[12.6444189,48.0490697],[12.6518457,48.0493225],[12.6564979,48.0476141],[12.6741239,48.0467782],[12.6740106,48.0452744],[12.6816377,48.0458961],[12.6860289,48.0349076],[12.6826671,48.0341289],[12.6856407,48.0294477],[12.6825498,48.0252175],[12.6879822,48.0208599],[12.6911325,48.0219263],[12.6997735,48.0196999],[12.7034477,48.0119514],[12.6993748,48.0120405],[12.6979668,48.0101224],[12.7045551,48.0053099],[12.7061879,48.0062688],[12.7034737,47.9975493],[12.6958825,47.9946762],[12.6934753,47.9865004],[12.6894097,47.9856878],[12.6838769,47.9870427],[12.6761276,47.9840457],[12.6756879,47.979062],[12.6715428,47.9792927],[12.6697612,47.9762248],[12.6723981,47.9721122],[12.6678208,47.9695303],[12.6621719,47.9716884],[12.6592149,47.9703283],[12.6603152,47.9655514],[12.6566373,47.9625804],[12.6586512,47.9613793],[12.6574203,47.9598177],[12.6499559,47.959509],[12.6499691,47.9567339],[12.6433613,47.9602092],[12.6377472,47.9595468],[12.6376127,47.9616367],[12.6321195,47.9624504],[12.6286777,47.9658774],[12.6316785,47.9680828],[12.628837,47.9730173],[12.5969356,47.968864],[12.5950766,47.9703637]]]}
    }
  ]
}

License

This osm-polygons data is made available under the Open Database License: http://opendatacommons.org/licenses/odbl/1.0/. Any rights in individual contents of the database are licensed under the Database Contents License: http://opendatacommons.org/licenses/dbcl/1.0/

Reverse Geocoding (what's here?)

The polygons offered by this project can e.g. be used to draw the outlines of your city. Or perform reverse geocoding: Take a point on a map and resolve its administrative membership: City, County, State and City. My other open source project https://github.com/krizleebear/osm-tools provides tools to do that in Java. So if you're trying to reverse-geocode huge amounts of data, voilá.

License considerations

Be aware that you must adhere to ODbL (as stated above) also while reverse geocoding. There's a special guide for that: https://wiki.osmfoundation.org/wiki/Licence/Community_Guidelines/Geocoding_-_Guideline

https://github.com/krizleebear/osm-polygons/releases/tag/v1.0