navigator.berlin

get_voting_district_geometry

Return the GeoJSON Feature (Polygon/MultiPolygon) for the Briefwahl-Gruppe (postal-voting group) of a Berlin voting district in a given election year — the smallest map unit is a group of neighboring voting districts merged with their shared postal-voting district, not a single voting district. Input: district_id (the uwbId from get_election_result on stimmbezirk-level, format depends on year — BTW 2021/2025: "075-01-100-0", BTW 2017: "078-05-05W221-0", AGH/BVV 2021/2023: "01W100-W", AGH/BVV 2016: "01W100") + year. Returns a GeoJSON Feature with properties.district_id + year + bezirk_code + is_gruppe (true when the group polygon was resolved; false falls back to the single voting district). Errors with geometry_not_available for pre-2017 BTW / pre-2016 AGH/BVV elections (only bezirk + berlin aggregation available), district_not_found if the id does not match any feature in the year layer.

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Input schema

{
  "type": "object",
  "properties": {
    "district_id": {
      "type": "string",
      "minLength": 1,
      "maxLength": 40
    },
    "year": {
      "type": "number",
      "minimum": 2011,
      "maximum": 2099
    }
  },
  "required": [
    "district_id",
    "year"
  ],
  "additionalProperties": false
}