ArcMap

Divide

Available with Spatial Analyst license.

Available with 3D Analyst license.

Summary

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

Illustration

Divide illustration
Divide_3d (InRas1, InRas2, OutRas)

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.

Syntax

Divide_3d (in_raster_or_constant1, in_raster_or_constant2, out_raster)
ParameterExplanationData 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
out_raster

The output raster.

The cell values are the quotient of the first input raster (dividend) divided by the second input (divisor).

Raster Dataset

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
env.workspace = "C:/data"
arcpy.Divide_3d("degs", "negs", "C:/output/outdivide2")
Divide example 2 (stand-alone script)

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

# Name: Divide_3d_Ex_02.py
# Description: Divides the values of two rasters on a cell-by-cell basis
# Requirements: 3D Analyst Extension

# Import system modules
import arcpy
from arcpy import env

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

# Set local variables
inRaster1 = "elevation"
inRaster2 = "landuse"

# Check out the ArcGIS 3D Analyst extension license
arcpy.CheckOutExtension("3D")

# Execute Divide
arcpy.Divide_3d(inRaster1, inRaster2, "C:/output/outdivide")

Environments

Licensing information

  • ArcGIS Desktop Basic: Requires 3D Analyst or Spatial Analyst
  • ArcGIS Desktop Standard: Requires 3D Analyst or Spatial Analyst
  • ArcGIS Desktop Advanced: Requires 3D Analyst or Spatial Analyst

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