Abs (Spatial Analyst)

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.

Syntax

Abs (in_raster_or_constant)

Parameter	Explanation	Data Type
in_raster_or_constant	The input raster for which to calculate the absolute values. In order 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"

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

# Execute Abs
outAbs = Abs(inRaster)

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

Environments

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

Licensing Information

ArcGIS for Desktop Basic: Requires Spatial Analyst

ArcGIS for Desktop Standard: Requires Spatial Analyst

ArcGIS for Desktop Advanced: Requires Spatial Analyst