This service could be used to perform arithmetic on raster map layers.
Operation:
map_calculation - Allow the user to perform arithmetic on raster map layers. The user can add one, two or three single-band raster datasets to form one output single-band raster. The variable names in the formula expression should be specified singly as a, b, c.
Request Parameters:
sourceURLArray
URL Array of a group of imagery files to be calculated. Input images could be up to 3
Default format: GeoTIFF
formula
The formula entered by the user
Parameter format: string
outputGeoTiffType
Type of output GeoTIFF file. The output Format Type is specified as GeoTIFF