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Cell Statistics

Available with Spatial Analyst license.

Available with Image Analyst license.

Summary

Calculates a per-cell statistic from multiple rasters.

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

Learn more about how Cell Statistics works

Illustration

Cell Statistics - Sum illustration
OutRas = CellStatistics([InRas1, InRas2, InRas3], "SUM", "NODATA")

Usage

  • The order of the input rasters is irrelevant for this tool.

  • For statistic types Maximum, Minimum, Mean, Median, Majority, Minority and Sum, if a single raster is used as the input, the output cell values will be the same as the input cell values. For Range and Standard deviation the output cell values will all be 0, and for Variety, all 1.

  • See Analysis environments and Spatial Analyst for additional details on the geoprocessing environments that apply to this tool.

Syntax

CellStatistics (in_rasters_or_constants, {statistics_type}, {ignore_nodata})
ParameterExplanationData Type
in_rasters_or_constants
[in_raster_or_constant,...]

A list of input rasters for which a statistic will be calculated for each cell within the Analysis window.

A number can be used as an input; however, the cell size and extent must first be set in the environment.

Raster Layer; Constant
statistics_type
(Optional)

Statistic type to be calculated.

  • MEAN Calculates the mean (average) of the inputs.
  • MAJORITY Determines the majority (value that occurs most often) of the inputs.
  • MAXIMUM Determines the maximum (largest value) of the inputs.
  • MEDIAN Calculates the median of the inputs.
  • MINIMUM Determines the minimum (smallest value) of the inputs.
  • MINORITY Determines the minority (value that occurs least often) of the inputs.
  • RANGE Calculates the range (difference between largest and smallest value) of the inputs.
  • STD Calculates the standard deviation of the inputs.
  • SUM Calculates the sum (total of all values) of the inputs.
  • VARIETY Calculates the variety (number of unique values) of the inputs.

The default statistic type is Mean.

String
ignore_nodata
(Optional)

Denotes whether NoData values are ignored by the statistic calculation.

  • DATAAt the processing cell location, if any of the input rasters has NoData, then that NoData value will be ignored. The statistics will be computed by only considering the cells with valid data. This is the default.
  • NODATA If the processing cell location for any of the input rasters is NoData, then the output for that cell will be NoData.
Boolean

Return Value

NameExplanationData Type
out_raster

The output raster.

For each cell, the value is determined by applying the specified statistic type to the input rasters at that location.

Raster

Code sample

CellStatistics example 1 (Python window)

This example calculates the standard deviation per cell on several input Grid rasters and outputs the result as an IMG raster.

import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outCellStats = CellStatistics(["degs", "negs", "cost"], "STD", "DATA")
outCellStats.save("C:/sapyexamples/output/outcellstats.img")
CellStatistics example 2 (stand-alone script)

This example calculates the standard deviation per cell on several input Grid rasters and outputs the result as a Grid raster.

# Name: CellStatistics_Ex_02.py
# Description: Calculates a per-cell statistic from multiple rasters
# Requirements: Spatial Analyst Extension

# Import system modules
import arcpy
from arcpy import env
from arcpy.sa import *

# Set environment settings
env.workspace = "C:/sapyexamples/data"

# Set local variables
inRaster01 = "degs"
inRaster02 = "negs"
inRaster03 = "cost"

# Execute CellStatistics
outCellStatistics = CellStatistics([inRaster01, inRaster02, inRaster03], "RANGE", "NODATA")

# Save the output 
outCellStatistics.save("C:/sapyexamples/output/cellstats")

Licensing information

  • ArcGIS Desktop Basic: Requires Spatial Analyst or Image Analyst
  • ArcGIS Desktop Standard: Requires Spatial Analyst or Image Analyst
  • ArcGIS Desktop Advanced: Requires Spatial Analyst or Image Analyst

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