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    @wikimedia/kartotherian-geoshapes

    1.1.4 • Public • Published

    Build Status

    @wikimedia/kartotherian-geoshapes

    Kartotherian service to generate geometric shapes from PostgreSQL data

    See https://github.com/kartotherian/kartotherian

    To configure, add geoshapes section to the kartotherian configuration with the following parameters:

    geoshapes:
      host: localhost
      database: gis
      table: planet_osm_polygon
      user: ...
      password: ...
    
      maxidcount: (int, optional, default=500) - Maximum number of IDs to allow per request
      allowUserQueries: (bool, optional, default=false) - If true, allow sql parameter + args to specify which SQL to use
      wikidataQueryService: (string, optional, default=https://query.wikidata.org/bigdata/namespace/wdq/sparql) - Lets user get a list of WikidataIDs from an external Wikidata Query Service. if false, disables.
    

    Without this config block, the service will skip its loading

    Make sure to create a Postgres index, e.g.:

    CREATE INDEX planet_osm_polygon_wikidata
      ON planet_osm_polygon ((tags -> 'wikidata'))
      WHERE tags ? 'wikidata';
    

    Service will return topojson to the queries such as /geoshape?ids=Q1384,Q1166 (get New York and Michigan state shapes). Save result as a file and upload to http://www.mapshaper.org/ to visualize.

    Additionally, the service allows query=... parameter to get the Wikidata IDs from the http://query.wikidata.org service. It calls the service to execute a query, extracts IDs, and matches them with the shapes in the OSM database. All other values are returned as topojson object properties.

    Optional truthy parameter getgeojson=1 will force the result to be returned as geojson rather than topojson.

    Install

    npm i @wikimedia/kartotherian-geoshapes

    DownloadsWeekly Downloads

    4

    Version

    1.1.4

    License

    Apache-2.0

    Unpacked Size

    30.3 kB

    Total Files

    9

    Last publish

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