Hi, See this and find test data and example commands https://github.com/opengeospatial/OGC-API-Sprint-August-2020/issues/18.
If PixelIsPoint image has these GeoTIFF tags Geotiff_Information: Version: 1 Key_Revision: 1.0 Tagged_Information: ModelTiepointTag (8,3): 0 0 0 -90 90 0 1024 0 0 0 90 0 0 1024 0 -90 0 0 1024 1024 0 0 0 0 End_Of_Tags. Keyed_Information: GTModelTypeGeoKey (Short,1): ModelTypeGeographic GTRasterTypeGeoKey (Short,1): RasterPixelIsPoint and PixelIsArea has the same tags except GTRasterTypeGeoKey (Short,1): RasterPixelIsArea Now shouldn't the PixelIsPoint image slide half a pixel to the left and upwards compared to PixelIsArea image? If I run these images through gdalwarp the warped pixel_is_area image shows corner coordinates Upper Left (-180.0000000, 90.0000000) and pixel_is_point image Upper Left (-179.9560547, 89.9560547), so sliding happens to the right and downwards. It is late and I feel fuzzy but shouldn't the pixel_is_point variant has smaller easting, greater northing instead, thus (-180,0439453, 90,04394531)? The images are georeferenced with tiepoints/GCPs, perhaps it adds something to the soup? -Jukka Rahkonen-
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