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    3.0.0-beta.5 • Public • Published


    Converts OSM data to GeoJSON. Try the demo!

    This code is used in and maintained by the overpass turbo project.

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    command line tool


      $ npm install -g osmtogeojson


    $ osmtogeojson file.osm > file.geojson

    Supported command line options are shown with:

    $ osmtogeojson --help

    When working with extra large data files (≳ 100 MB) it is recommended to run the programm with a little extra memory to avoid process out of memory errors. The easiest way to do this is by running the command as node <path-to-osmtogeojson> and setting the --max_old_space_size=… parameter to the available memory size in MB (osmtogeojson typically needs about 4-5 times the input data size). On a Unix system, you can use the following command:

    $ node --max_old_space_size=8192 `which osmtogeojson` large.osm > large.geojson

    nodejs library


    $ npm install osmtogeojson


    var osmtogeojson = require('osmtogeojson');

    browser library

    <script src='osmtogeojson.js'></script>


    osmtogeojson( data, options )

    Converts OSM data into GeoJSON.

    • data: the OSM data. Either as a XML DOM or in OSM JSON.
    • options: optional. The following options can be used:
      • flatProperties: If true, the resulting GeoJSON feature's properties will be a simple key-value list instead of a structured json object (with separate tags and metadata). default: false
      • uninterestingTags: Either a blacklist of tag keys or a callback function. Will be used to decide if a feature is interesting enough for its own GeoJSON feature.
      • polygonFeatures: Either a json object or callback function that is used to determine if a closed way should be treated as a Polygon or LineString. read more

    The result is a javascript object of GeoJSON data:


    The GeoJSON produced by this library will include exactly one GeoJSON-feature for each of the following OSM objects (that is everything that is also visible in overpass turbo's map view):

    • all unconnected or interesting tagged nodes (POIs)
    • all ways (except uninteresting multipolygon outlines)
    • all multipolygons (simple multipolygons with exactly one closed outer way are present via their outer way)

    All data is given as a FeatureCollection. Each Feature in the collection has an id property that is formed from the type and id of the original OSM object (e.g. node/123) and has the member properties containing the following data:

    • type: the OSM data type
    • id: the OSM id
    • tags: a collection of all tags
    • meta: metainformaton about the feature (e.g. version, timestamp, user, etc.)
    • relations: an array of relations the feature is member of. Each relation is encoded as an object literal containing the following properties: role (membership role), rel (the relation's id) and reltags (contains all tags of the relation)
    • tainted: this flag is set when the feature's geometry is incomplete (e.g. missing nodes of a way or missing ways of a multipolygon)

    If the option flatProperties is set to true, the properties object will not contain any nested object literals, but directly provide a concise id, meta data and the tags of the respective OSM object.


    npm i @map-gl-indoor/osmtogeojson

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