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An overview of the Local toolset

Available with Spatial Analyst license.

The local tools 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.

To perform the calculation, a local tool 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.

With the local tools, 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.

There are five general categories of analysis that local tools perform:

  • Calculate a statistic for each location (for example, the minimum value).
    • Learn more about how the statistics from multiple inputs for each location are calculated
  • Assign a unique value for each unique combination of values at each location.
    • Learn more about combining multiple rasters
  • Assign the number of times the cell location input values for the location meet a specified criterion relative to another input value.
    • Learn more about determining the number of times a specified criterion is met
  • Assign the value at the cell location that meets a specified criterion relative to other input values.
    • Learn more about determining the value of a location meeting a criterion relative to other inputs
  • Assign the position of the raster containing the cell value that meets a specified criterion relative to another input value.
    • Learn more about determining the position of a raster containing the cell value that meets a specified criterion

The following table lists the available Local toolset tools and provides a brief description of each.

ToolDescription

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

The values from the set of input rasters are ranked on a cell-by-cell basis, and which of these gets returned is determined by the value of the rank input raster.

Tools in the Local toolset

Related topics

  • An overview of the Spatial Analyst toolbox

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