# Local geoprocessing functions

Available with Spatial Analyst license.

The Local geoprocessing functions are those where the value at each cell location on the output raster is a function of the values from all the inputs at that location. With these geoprocessing functions, you can combine the input rasters, calculate a statistic on them, or evaluate a criterion for each cell on the output raster based on the values of each cell from multiple input rasters.

To perform the calculation, a local geoprocessing function only needs, for each of the input rasters, the value at that location, as well as (in some cases) a comparison value. Once the result is generated, the calculation is made for the next cell location, and the process is iterated until all cells have been processed.

There are five general categories of analysis that local geoprocessing functions perform:

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

Geoprocessing FunctionDescription

Cell Statistics

Calculates a per-cell statistic from multiple rasters.

The available statistics are Majority, Maximum, Mean, Median, Minimum, Minority, Range, Standard deviation, Sum, and Variety.

Combine

Combines multiple rasters so that a unique output value is assigned to each unique combination of input values.

Equal To Frequency

Evaluates on a cell-by-cell basis the number of times the values in a set of rasters are equal to another raster.

Greater Than Frequency

Evaluates on a cell-by-cell basis the number of times a set of rasters is greater than another raster.

Highest Position

Determines on a cell-by-cell basis the position of the raster with the maximum value in a set of rasters.

Less Than Frequency

Evaluates on a cell-by-cell basis the number of times a set of rasters is less than another raster.

Lowest Position

Determines on a cell-by-cell basis the position of the raster with the minimum value in a set of rasters.

Popularity

Determines the value in an argument list that is at a certain level of popularity on a cell-by-cell basis. The particular level of popularity (the number of occurrences of each value) is specified by the first argument.

Rank

Ranks on a cell-by-cell basis the values from a set of input rasters and determines which values are returned based on the value of the rank input raster.

Geoprocessing functions in the Local category