Vienna municipal district boundaries

Source: City of Vienna Open Government Data, BEZIRKSGRENZEOGD.
Dataset and license metadata:
https://www.data.gv.at/datasets/2ee6b8bf-6292-413c-bb8b-bd22dbb2ad4b?locale=en

Official WFS query (WGS84 longitude/latitude):
https://data.wien.gv.at/daten/geo?service=WFS&request=GetFeature&version=1.1.0&typeName=ogdwien:BEZIRKSGRENZEOGD&srsName=EPSG:4326&outputFormat=json

Source geometry timestamp: 2026-09-01.
Retrieved: 2026-10-13.
Attribution: Datenquelle: Stadt Wien – data.wien.gv.at.
License: Creative Commons Attribution 4.0 International (CC BY 4.0).
https://creativecommons.org/licenses/by/4.0/

Changes: all 23 official municipal districts retained; properties normalized
to the guide's numbered IDs; boundaries simplified at 0.000025 degrees;
polygon winding normalized. Labels placed within their corresponding polygons.
No district shapes have been invented. This learning map is not a survey.

Rebuild: save the WFS response, then run
node scripts/build-vienna-districts.mjs <path-to-response.json>