OvertureMaps / OvertureMaps/data
Duplicate GERS IDs for buildings due to MultiPolygons in the source data.
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@atiannicelli is already working on this.
Since Feb 5, 2026.
buildings
data sources
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Description
As of the January 2026 release, there are 98,048 buildings that are MultiPolygons. I am not clear what the solution to this should be, as Alex Iannicelli has already stated, splitting non-contiguous buildings into separate GERS would break the bridge file logic.
Here is an example image of a MutliPolygon GERS: e1b484fb-4ac8-4c68-b741-fcc019942571
The breakdown by source:
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