Describe the bug
I detected a minor topology error (sliver gaps) in the IPCC-WGI-reference-regions-v4 shapefile dataset.
When performing spatial masking/rasterization on a standard rectilinear grid using tools like regionmask or rasterio, certain grid pixels at high latitudes fall exactly into the tiny unclosed gaps between adjacent reference regions, resulting in unexpected NaN values.
Location of the error
The gaps are located in the high-latitude Arctic region (near 80°N / 81°N). Here are two exact coordinate points that fall into the unassigned gaps between the polygons:
- Pixel 1: Lon: -111.0000°, Lat: 80.0000°
- Pixel 2: Lon: -105.0000°, Lat: 81.0000°
Visual Proof (QGIS)
Describe the bug
I detected a minor topology error (sliver gaps) in the
IPCC-WGI-reference-regions-v4shapefile dataset.When performing spatial masking/rasterization on a standard rectilinear grid using tools like
regionmaskorrasterio, certain grid pixels at high latitudes fall exactly into the tiny unclosed gaps between adjacent reference regions, resulting in unexpectedNaNvalues.Location of the error
The gaps are located in the high-latitude Arctic region (near 80°N / 81°N). Here are two exact coordinate points that fall into the unassigned gaps between the polygons:
Visual Proof (QGIS)