Cell Statistics (Spatial Analyst)

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

OutRas = CellStatistics([InRas1, InRas2, InRas3], "SUM", "DATA")

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 STD the output cell values will all be 0, and for Variety, all 1.

Syntax

CellStatistics (in_rasters_or_constants, {statistics_type}, {ignore_nodata})

Parameter	Explanation	Data 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.	String
ignore_nodata (Optional)	Denotes whether NoData values are ignored by the statistic calculation. DATA — Only cells that have data values will be used in determining the statistic value.If a NoData value exists at a certain location, the NoData value will be ignored. Only cells that have data values will be used in determining the output. NODATA — All input cells at each location, including those with a value of NoData, will be used in determining the statistic.	Boolean

Return Value

Name	Explanation	Data Type
out_raster	The output raster. The value is determined by applying the specified statistic type to the input rasters.	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
# Author: ESRI

# 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"

# Check out the ArcGIS Spatial Analyst extension license
arcpy.CheckOutExtension("Spatial")

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

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

Environments

Cell Size, Current Workspace, Mask, Output Coordinate System, Extent, Scratch Workspace, Snap Raster

Licensing Information

ArcView: Requires Spatial Analyst

ArcEditor: Requires Spatial Analyst

ArcInfo: Requires Spatial Analyst