Database was last updated on: 2018-06-18T13:26:02Z
This will generate the whole geometry of the given OSM relation id, with the corresponding sub-relations. When the geometry is available, it is possible to generate simplified geometries from this one, and export them as .poly, GeoJSON, WKT or image formats.
Use this if you want to import your own .poly file, and do union operations with OSM relations.