Abs (Spatial Analyst)

Available with Spatial Analyst license.

Available with Image Analyst license.

Summary

Calculates the absolute value of the cells in a raster.

Illustration

OutRas = Abs(InRas1)

Usage

• Input values can be positive or negative and can be either integer or floating point.

• If the input is integer, the output raster will be integer type. If the input is floating point, the output raster will be floating point.

• If the input is a multiband raster, the output will be a multiband raster. The tool will perform the operation on each band in the input.

• In ArcPy, if the input is a multidimensional raster, all slices from all variables will be processed, and the output will be a multidimensional raster.

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

Parameters

Dialog

Label	Explanation	Data Type
Input raster or constant value	The input raster for which to calculate the absolute values. To use a number as an input for this parameter, the cell size and extent must first be set in the environment.	Raster Layer; Constant

Return Value

Label	Explanation	Data Type
Output raster	The output raster. The cell values are the absolute value of the cells of the input raster.	Raster

Python

Abs(in_raster_or_constant)

Name	Explanation	Data Type
in_raster_or_constant	The input raster for which to calculate the absolute values. To use a number as an input for this parameter, 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 absolute value of the cells of the input raster.	Raster

Code sample

Abs example 1 (Python window)

This example returns a Grid raster with the absolute value of the input values.

import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outAbs = Abs("negs")
outAbs.save("C:/sapyexamples/output/abs2")

Abs example 2 (stand-alone script)

This example returns a TIFF raster with the absolute value of the input values.

# Name: Abs_Ex_02.py
# Description: Calculates the absolute value of cells in a raster 
# 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
inRaster = "negs"

# Execute Abs
outAbs = Abs(inRaster)

# Save the output 
outAbs.save("C:/sapyexamples/output/outabs.tif")

Environments

Auto Commit, Cell Size, Cell Size Projection Method, Compression, Current Workspace, Extent, Geographic Transformations, Mask, Output CONFIG Keyword, Output Coordinate System, Scratch Workspace, Snap Raster, Tile Size

Licensing information

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