Divide (Spatial Analyst)

Summary

Divides the values of two rasters on a cell-by-cell basis.

Illustration

OutRas = Divide (InRas1, InRas2)

Usage

• The order of inputs is relevant for this tool.

• When a number is divided by zero, the output result is NoData.

• The data types of the inputs to determine the data type of the output:

  • If both inputs are integers, an integer division is performed, and the output result is an integer. For example, if 3 is divided by 2, the output is 1.
  • If either input is floating-point, a floating-point division is performed, and the output result is a floating-point value. For example, if 3 is divided by 2.0, the output is 1.5.

• In Map Algebra, the equivalent operator symbol for this tool is "/" (link).

Syntax

Divide (in_raster_or_constant1, in_raster_or_constant2)

Parameter	Explanation	Data Type
in_raster_or_constant1	The input whose values will be divided by the second input. A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To be able to specify a number for both inputs, the cell size and extent must first be set in the environment.	Raster Layer | Constant
in_raster_or_constant2	The input whose values the first input are to be divided by. A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To be able to specify a number for both inputs, the cell size and extent must first be set in the environment.	Raster Layer | Constant

Return Value

Name	Explanation	Data Type
out_raster	The output raster. The cell values are the quotient of the first input raster (dividend) divided by the second input (divisor).	Raster

Code Sample

Divide example 1 (Python window)

This example divides the values of the first input raster by the second.

import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outDivide = Divide("degs", "negs")
outDivide.save("C:/sapyexamples/output/outdivide2")

Divide example 2 (stand-alone script)

This example divides the values of the first input raster by the second.

# Name: Divide_Ex_02.py
# Description: Divides the values of two rasters on a cell-by-cell basis
# 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 = "elevation"
inRaster02 = "landuse"

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

# Execute Divide
outDivide = Divide(inRaster01, inRaster02)

# Save the output 
outDivide.save("C:/sapyexamples/output/outdivide")

Environments

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

Licensing Information

ArcView: Requires Spatial Analyst or 3D Analyst

ArcEditor: Requires Spatial Analyst or 3D Analyst

ArcInfo: Requires Spatial Analyst or 3D Analyst