Hello, I need to crop an image based on a polygon from a shapefile. Could not figure how to do it so I used gdal_translate and I specified the extent of the shapefile like this gdal_translate -projwin -428734.998712 20337 1.497532 -387578.449250 172036.180727 EstMtl.img rssMtl.img
But the polygon is irregular. So the new image contains the region I need with some extra. From this new image Is there a way to assign "nodata" to pixels outside the irregular polygon? Or maybe there is a way to crop an image from an irregular polygon? thanks Steve Steve Toutant, M. Sc. Analyste en géomatique Secteur environnement Direction des risques biologiques, environnementaux et occupationnels Institut national de santé publique du Québec 945, avenue Wolfe Québec, Qc G1V 5B3 Tél.: (418) 650-5115 #5281 Fax.: (418) 654-3144 [email protected] http://www.inspq.qc.ca
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