An overview of the Raster Reclass toolset

Available with Spatial Analyst license.

Available with 3D Analyst license.

The Raster Reclass tools provide a variety of methods that allow you to reclassify or change input cell values to alternative values.

The most common reasons for reclassifying data are to accomplish the following:

  • Replace values based on new information.
  • Group certain values.
  • Reclassify values to a common scale.
  • Set specific values to NoData or set NoData cells to a value.

There are several approaches to reclassifying data. The methods of reclassification and the tools that perform them are as follows:

  • Individual values. (Lookup, Reclassify)
  • Ranges of values. (Reclass by ASCII File, Reclass by Table, Reclassify)
  • Intervals. (Slice)

The following topics provide background information on the theoretical aspects of the tools as well as some examples of their implementation:

The following table lists the available tools and provides a brief description of each:



Creates a raster by looking up values in another field in the table of the input raster.

Reclass by ASCII File

Reclassifies (or changes) the values of the input cells of a raster using an ASCII remap file.

Reclass by Table

Reclassifies (or changes) the values of the input cells of a raster using a remap table.


Reclassifies (or changes) the values in a raster.


Slices or reclassifies the range of values of the input cells into zones (classes). The available data classification methods are equal interval, equal area (quantile), natural breaks, standard deviation (mean-centered), standard deviation (mean as a break), defined interval, and geometric interval.

Tools of the Raster Reclass toolset

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