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Back to the catalogueData qualityCase 09 of 14
Missing polygons
A source dataset silently omits polygons for some regions (e.g. a boundary file missing a newly incorporated municipality), leaving gaps in cell coverage with no explicit null marker.
Class
Case to account for
Affects
3 conversions
01
Detection
Expected region-id list (from a canonical registry) has entries absent from the delivered geometry set.
02
Mitigation
01
Reconcile delivered feature ids against a canonical registry every load
02
Alert on any expected id with no matching geometry rather than fail silently
03
Affected conversions
Admin polygonsH3 (max-overlap partition)
OPENAdmin polygonsH3 (weighted crosswalk)
OPENPolygonH3 (intersects)
OPENMore in Data quality
Accuracy-radius attritionAxis-order reversal (lat/lng swap)Coastal / mixed pixelsConfidence-convention mismatchDuplicated region IDsGeocoding uncertaintyIncomplete geometryMissing CRS declarationRaster no-data valuesRaster/cell resolution mismatchRounded / truncated coordinatesWrong CRS assumedZero-island coordinates