Hi, I have 1 Landsat 7 ETM+ image, my_image.tif, and 1 shape file, my_shape_file.shp. my_image.tif uses the UTM projection associated to the WGS84 datum. my_shape_file.shp represents a boundary (a potato form boundary), which uses the Gauss Kruger projection ( which I read on Wikipedia was the same as the UTM projection) with the datum pulkovo 1942. I’m trying to extract a ROI using my shape file. I open my_image.tif, (File -> Open Image File) then open my_shape_file.shp (File -> Open Vector File). The “Import Vector File Parameters” of my shape file appears, and displays by default: Native File Projection: Gauss Kruger Datum: D_Pulkovo_1942 Units: meters I change those parameters to my fit my image my_image.tif to: Native File Projection: UTM Datum: WGS-84 Units: meters Zone: 37 N (my_image.tif parameters display this) Then I click “Apply Projection to Undefined” This warning message appears: “There are no undefined projections in this vector list. Do you want to apply this projection to all available vectors which will change their current projection?” I click “Yes” Then press “Ok” in the “Import Vector File Parameters” When I display my shape file (after selecting it in the “Available Vectors List” menu) in my display #1 (my_image.tif is displayed in this window), my_shape file does not appear… I tried also to let the native projection of my_shape_file.shp. And then display it on my_image.tif. Surprisingly, my_shape_file.shp appears on my_image.tif, and, apparently around the correct area. Can anyone tell me what’s wrong? Thank you Nick