Abs (Image 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.

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

Syntax

Abs(in_raster_or_constant)

Parameter	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.ia import *
env.workspace = "C:/iapyexamples/data"
outAbs = Abs("negs")
outAbs.save("C:/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 pixels in a raster 
# Requirements: Image Analyst Extension

# Import system modules
import arcpy
from arcpy import env
from arcpy.ia import *

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

# Set local variables
inRaster = "negs"

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

# Execute Abs
outAbs = Abs(inRaster)

# Save the output 
outAbs.save("C:/iapyexamples/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 Image Analyst or Spatial Analyst
• Standard: Requires Image Analyst or Spatial Analyst
• Advanced: Requires Image Analyst or Spatial Analyst