Specifying None as a nodata value works for native float32 format datasets such as glo_30.
But for int16 format datasets such as SRTM, gdal does not handle 'None' as a nodata value, such that the native integer nodata values (-32768) in the array must be masked to avoid interpolation and geoid removal artifacts.
Specifying
Noneas a nodata value works for nativefloat32format datasets such asglo_30.But for
int16format datasets such asSRTM, gdal does not handle 'None' as a nodata value, such that the native integer nodata values (-32768) in the array must be masked to avoid interpolation and geoid removal artifacts.