https://wiki.openstreetmap.org/wiki/Relation:multipolygon
Relation:multipolygon - OpenStreetMap Wiki
openstreetmap wikirelationmultipolygon
https://blog.jochentopf.com/2012-08-15-osmium-multipolygon-refactoring.html
Osmium MultiPolygon Refactoring — Jochen Topf
jochen topfosmiummultipolygonrefactoring
https://docs.smartmaps.cloud/v3/api/ym.modules.provider.multipolygon/
MultiPolygon - SmartMaps Documentation
Comprehensive documentation of all SmartMaps platform APIs and services, including maps, geocoding, routing, autocomplete and more for developers.
multipolygondocumentation
https://samples.azuremaps.com/polygons/simple-multipolygon
Simple MultiPolygon - Azure Maps Web SDK Samples
This sample shows how to render a MultiPolygon on the map.
azure mapsweb sdksimplemultipolygonsamples