Parent + child in one set
hierarchyA parent and one of its descendants both present double-count the shared area.
▪ Rendered from the real conversion/geometry code.Detection
hasParentChildDuplicate (ancestor present in set).
Mitigation
- Compact then uncompact to a target resolution
- Normalize before union/difference
Read the full article: H3 Compaction And Uncompaction →
Ether Data · Spatio-temporal intelligence