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Plus

Available with Spatial Analyst license.

Available with Image Analyst license.

Available with 3D Analyst license.

Summary

Adds (sums) the values of two rasters on a cell-by-cell basis.

Illustration

Plus illustration
Plus_3d (InRas1, InRas2, OutRas)

Usage

  • The order of inputs is irrelevant for this tool.

  • If both inputs are integer, the output will be an integer raster; otherwise, it will be a floating-point raster.

Syntax

Plus_3d (in_raster_or_constant1, in_raster_or_constant2, out_raster)
ParameterExplanationData Type
in_raster_or_constant1

The input whose values will be added to.

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 will be added to the first 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
out_raster

The output raster.

The cell values are the sum of the first input added to the second.

Raster Dataset

Code sample

Plus example 1 (Python window)

This example adds the values of two Grid rasters and outputs the result as an IMG raster.

import arcpy
from arcpy import env
env.workspace = "C:/data"
arcpy.Plus_3d("elevation", 15, "C:/output/outplus.img")
Plus example 2 (stand-alone script)

This example adds the values of two Grid rasters and outputs the result as a Grid raster.

# Name: Plus_3d_Ex_02.py
# Description: Adds 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:/data"

# Set local variables
inRaster = "elevation"
inConstant = 15

# Execute Plus
arcpy.Plus_3d(inRaster, inConstant,"c:/output/outplus")

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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