Interactive publication
Back to the catalogueGeometryCase 13 of 13
Unclosed rings
A polygon ring whose first and last coordinates differ is not technically closed, causing GeoJSON-strict fillers to throw or silently miscompute area.
Class
Case to account for
Affects
3 conversions
01
Detection
First coordinate does not equal last coordinate for any ring.
02
Mitigation
01
Auto-close by appending the first vertex
02
Reject upstream sources that produce unclosed rings and flag for a data-contract fix
03
Affected conversions
PolygonH3 (center-contained)
OPENPolygonH3 (fully-contained)
OPENPolygonH3 (intersects)
OPEN