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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

Hi

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?

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