Minus function

Available with Spatial Analyst license.

Overview

Subtracts the value of the second input raster from the value of the first input raster on a pixel-by-pixel basis.

Notes

The order of the inputs are important, since they affect the output result.

If both inputs are integer, the output will be an integer raster; otherwise, it will be a floating-point raster.

Parameters

Parameter name	Description
Raster	The input from which to subtract the values of the second input. A constant value can be used as an input for this parameter, provided a raster is specified for the other parameter.
Raster2	The input values to subtract from the values of the first input. A constant value can be used as an input for this parameter, provided a raster is specified for the other parameter.
Extent Type	Choose which extent should be used in the output raster: First Of—Use the extent of the first input raster to determine the processing extent. Intersection Of—Use the extent of the overlapping pixels to determine the processing extent. This is the default. Union Of—Use the extent of all the rasters to determine the processing extent. Last Of—Use the extent of the last input raster to determine the processing extent.
Cellsize Type	Choose which cell size to use in the output raster. If all the input cell sizes are the same, all the options will yield the same results. First Of—Use the first cell size of the input rasters. Min Of—Use the smallest cell size of all the input rasters. Max Of—Use the largest cell size of all the input rasters. This is the default. Mean Of—Use the mean cell size of all the input rasters. Last Of—Use the last cell size of the input rasters.