And if you are lucky the image has an alpha band that is light to polygonize. A reserved tiff tag for saving the image footprint as WKT or json could be nice but then I guess that GDALPamDataset should be extented to support one more method for nodata.
-Jukka Rahkonen- Patrick Young wrote > One trick I like regarding accessing overview levels is to use the open > option to snag a handle direct to the overview level (see Even's post > http://erouault.blogspot.com/2014/10/warping-overviews-and-warped-overviews.html); > then you can run polygonize against a much smaller dataset. If it's a COG > presumably it has internal overviews. -- Sent from: http://osgeo-org.1560.x6.nabble.com/GDAL-Dev-f3742093.html _______________________________________________ gdal-dev mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/gdal-dev
