I want to compare my two rasters: 1) a reference raster and 2) a raster that result from merging different rasters. What I did was to clip the reference raster with all the administrative boundaries (around 81 shapefiles) - so it produces 81 raster layers. Then when I compare the sum of the clipped rasters per province the number of pixel count were reduced (~200 pixels). So what I did was to merge again all the clipped raster so I can compare it with the reference raster. And as I initially suspect, there are discrepancy on the pixel count. I need to locate where are the pixels that were removed, but I cannot find an appropriate tool. can somebody help me on this?
Leo, Use a con() statement in the raster calculator. Using: Ref_Raster and Result_Raster Con(IsNull(Result_Raster), Ref_Raster) so, where the condition exists that the Result_Raster is null, return the cell value of the Ref_Raster. If the Ref_Raster is null also, you get nothing returned. If the Ref_Raster has a value at that cell, you will get the value returned, so, you end up with a raster that only shows values where the Result_Raster is null, and the Ref_Raster is not null. Best Regards, Jim
Leo, Use a con() statement in the raster calculator. Using: Ref_Raster and Result_Raster Con(IsNull(Result_Raster), Ref_Raster) so, where the condition exists that the Result_Raster is null, return the cell value of the Ref_Raster. If the Ref_Raster is null also, you get nothing returned. If the Ref_Raster has a value at that cell, you will get the value returned, so, you end up with a raster that only shows values where the Result_Raster is null, and the Ref_Raster is not null. Best Regards, Jim
