The overlay tool lays one map onto another, using the specified
arithmetic operation. The two maps must have the same dimensions and resolution. All files are in ARCGIS ASCII format.
mstOverlay InputFile1 InputFile2 OutputFile Operation
InputFile1 is the file to load the first map (map 1) from
InputFile2 is the file to load the second map (map 2) from
OutputFile is the file to save the resulting map to
Operation is one of +, -, / or
x. + will add the contents of each cell. - will subtract map 2 from map
1. / will divide map 1 by map 2 and x will multiply the two maps
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Maintained by Michael J. Watts