Hi all, I need some clarifications on how raster clipper algorithm works with not georeferenced images.
My tiff data present negative y coordinates, so when I select my area of interest in the viewer, the x-y upper left / lower right points are, for instance: ulx: 2818.33065257 uly: -5304.31204044 lrx: 3223.66153493 lry:-5825.45174632 Original image is 10000 x 6191 pixel the Clipper plugin does not understand that data are not georeferenced, so running command: gdal_translate -projwin 2818.33065257 -5304.31204044 3223.66153493 -5825.45174632 C:\Dati_Utente\f.mure\work\UTILITY\DATA\Pleiades_Primary_Product_Bundle\Pleiades_Primary_Product_Bundle.tiff you got an error (Computed -srcwin falls outside raster size of 10000x6191. ). if you run gdal_traslate with -srcwin option you have to change input parameters to express xoffset, yoffsset, xsize, ysize, instead of ulx uly lrx lry. In my example, xoff = 2818 yoff = 6191 - 5304 xsize = 500 ysize = 500 And finally, gdal_translate -srcjwin 2818 794 500 500 C:\Dati_Utente\f.mure\work\UTILITY\DATA\Pleiades_Primary_Product_Bundle\Pleiades_Primary_Product_Bundle.tiff works fine. Now my doubts/questions are: - is there a way to switch automatically between [-projwin ulx uly lrx lry] to [-srcwin xoff yoff xsize ysize] gdal_translate options, depending on data projections (georefenced or not). - is it possible to get extracted sub-image overlapped with the selected area on the original image? Could anyone give me some help? Thanks in advance, Fabrizio
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