Wrong output of raster2polygon in case exact=False.

from geoarray import GeoArray
from py_tools_ds.geo.raster.conversion import raster2polygon

gA = GeoArray('mask.tif')
raster2polygon(gA.mask_nodata.astype(np.uint8), gA.gt, gA.prj, exact=False)

returns:

where the input image clearly has valid values on the right: