Corridor (Spatial Analyst)

Summary

Calculates the sum of accumulative costs for two input accumulative cost rasters.

Learn more about creating a least cost corridor

Usage

• While any two rasters can be used for the input, to obtain a meaningful result they should be unaltered accumulative cost output rasters.

• The order of the two inputs is irrelevant.

Syntax

Corridor (in_distance_raster1, in_distance_raster2)

Parameter	Explanation	Data Type
in_distance_raster1	The first input distance raster. It should be an accumulated cost distance output from a distance tool such as Cost Distance or Path Distance.	Raster Layer
in_distance_raster2	The second input distance raster. It should be an accumulated cost distance output from a distance tool such as Cost Distance or Path Distance.	Raster Layer

Return Value

Name	Explanation	Data Type
out_raster	The output corridor raster.	Raster

Code Sample

Corridor example 1 (Python window)

The following Python Window script demonstrates how to use the Corridor tool.

import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outCorr = Corridor("costraster", "focalcost.tif")
outCorr.save("c:/sapyexamples/output/corridor")

Corridor example 2 (stand-alone script)

Calculate a wildlife corridor between two known protected areas.

# Name: Corridor_Ex_02.py
# Description: Calculate a potential wildlife corridor between 
#              two known protected areas.
# Requirements: Spatial Analyst Extension
# Author: ESRI

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

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

# Set local variables
inCostRaster = "costdist01"
nextCostRaster = "cotdist02"

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

# Execute Corridor
outCorridor = Corridor(inCostRaster, nextCostRaster) 

#Limit the corridor to a threshold to show a potential corridor
corridor = Con(outCorridor, 1, 0, "VALUE < 100")

# Save the output 
outCorridor.save("C:/sapyexamples/output/costout")

Environments

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

Licensing Information

ArcView: Requires Spatial Analyst

ArcEditor: Requires Spatial Analyst

ArcInfo: Requires Spatial Analyst