Lookup

Available with Image Analyst license.

Summary

Creates a raster object by looking up values found in another field in the table of the input raster.

Discussion

For more information about how this function works, see the Lookup raster function.

The referenced raster dataset for the raster object is temporary. To make it permanent, you can call the raster object's save method.

Syntax

Lookup (raster, {field})

Parameter	Explanation	Data Type
raster	The input raster that contains a field from which to create a raster. It can be either integer or floating-point type.	Raster
field	Field containing the desired values for the new raster.	String

Return Value

Data Type	Explanation
Raster	The output raster.

Code sample

Lookup example 1

This example creates a raster by looking up values found in another field in the table of the input raster.

from arcpy.ia import *
out_lookup_raster = Lookup("itemgrd", "bin")
out_lookup_raster.save("C:/arcpyExamples/outputs/output.tif")

Lookup example 2

This example creates a raster by looking up values found in another field in the table of the input raster.

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

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

# Set the analysis environments
arcpy.env.workspace = "C:/arcpyExamples/data"

# Set the local variables
in_raster = "itemgrd"
in_field = "String"

# Execute Lookup function
out_lookup_raster = Lookup(in_raster, in_field)

# Save the output
out_lookup_raster.save("C:/arcpyExamples/outputs/output.tif")