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Raster Algebra - a question of resolution?

Question asked by BTLeslie on Aug 14, 2014
Latest reply on Sep 1, 2014 by curtvprice


I'm trying to do some algebra with two height rasters.... Just a simple Raster1 minus Raster2 to get a height difference.


The trouble is, I think, that the two rasters are different resolutions and when I inspect my resulting TIFF I do not agree with any of the values:


eg. if I inspect a random pixel

     Raster1 = 265

     Raster2 = 228


     OutputRaster = 97 (of course I expect the value to be 37)


The resolution of the output is the same as the input raster with the lower resolution (but the pixels do not line-up).  Logically the output should have the same resolution of the more detailed input.


I there something I can do so this works intelligently with rasters of differing resolutions?