General Math geoprocessing functions

Available with Spatial Analyst license.

Available with Image Analyst license.

The general Math geoprocessing functions apply a mathematical function to the input. These geoprocessing functions fall into several categories. The arithmetic geoprocessing functions perform basic mathematical operations, such as addition and multiplication. There are geoprocessing functions that perform various types of exponentiation operations, which includes exponentials and logarithms in addition to the basic power operations. The remaining geoprocessing functions are used either for sign conversion or for conversion between integer and floating point data types.

Within these broad categories, some geoprocessing functions operate on two inputs, while the others operate on a single input.

Geoprocessing functions with two inputs:

• Arithmetic: Plus, Minus, Times, Divide, Mod (modulus)
• Power: Power

Geoprocessing functions with a single input:

• Exponential: Exp, Exp2, Exp10
• Logarithmic: Ln, Log2, Log10
• Power: Square, Square Root
• Sign: Abs, Negate
• Type conversion: Float, Int, Round Down, Round Up

The following table lists the available geoprocessing functions and provides a brief description of each.

Geoprocessing functions in the General Math category

Geoprocessing Function	Description
Abs	Calculates the absolute value of the cells in a raster.
Divide	Divides the values of two rasters on a cell-by-cell basis.
Exp	Calculates the base e exponential of the cells in a raster.
Exp10	Calculates the base 10 exponential of the cells in a raster.
Exp2	Calculates the base 2 exponential of the cells in a raster.
Float	Converts each cell value of a raster into a floating-point representation.
Int	Converts each cell value of a raster to an integer by truncation.
Ln	Calculates the natural logarithm (base e) of cells in a raster.
Log10	Calculates the base 10 logarithm of cells in a raster.
Log2	Calculates the base 2 logarithm of cells in a raster.
Minus	Subtracts the value of the second input raster from the value of the first input raster on a cell-by-cell basis.
Mod	Finds the remainder (modulo) of the first raster when divided by the second raster on a cell-by-cell basis.
Negate	Changes the sign (multiplies by -1) of the cell values of the input raster on a cell-by-cell basis.
Plus	Adds (sums) the values of two rasters on a cell-by-cell basis.
Power	Raises the cell values in a raster to the power of the values found in another raster.
Round Down	Returns the next lower integer value, just represented as a floating point, for each cell in a raster.
Round Up	Returns the next higher integer value, just represented as a floating point, for each cell in a raster.
Square	Calculates the square of the cell values in a raster.
Square Root	Calculates the square root of the cell values in a raster.
Times	Multiplies the values of two rasters on a cell-by-cell basis.

Note:

Some General Math geoprocessing functions are also available with the 3D Analyst extension toolbox.