By Ether Data
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Empty geometries

Geometry

A feature with a null or zero-ring geometry (e.g. GEOMETRYCOLLECTION EMPTY, or coordinates: []) produces no cells and can silently vanish from an audience or trade-area union.

Detection

Geometry is null, coordinates array is empty, or ring count is 0.

Mitigation

  • Filter and log empty geometries at ingest rather than let them drop silently
  • Alert when a feature count declines after a geometry-processing step

Affected conversions

  • PolygonH3 (center-contained)
  • PolygonH3 (fully-contained)
  • PolygonH3 (intersects)
  • Admin polygonsH3 (max-overlap partition)