Thiessen (Coverage)

Summary

Converts input coverage points to an output coverage of Thiessen proximal polygons.

Learn more about how Thiessen works

Illustration

Create Thiessen polygons illustration

Usage

Syntax

Thiessen_arc (in_cover, out_cover, {proximal_tolerance})
ParameterExplanationData Type
in_cover

The coverage that must have a point feature attribute table created by BUILD with the POINT option.

Coverage
out_cover

The polygon coverage in which the Thiessen proximal polygons will be produced.

Coverage
proximal_tolerance
(Optional)

Tolerance used to eliminate Input Coverage points that fall within the specified distance of other Input Coverage points. The default Proximal Tolerance is the machine precision of the computer.

Double

Code Sample

Thiessen example (stand-alone script)

The following stand-alone script demonstrates how to create a thiessen proximal polygon around each well in a point coverage.

# Name: Thiessen_Example.py
# Description: Creates a thiessen area around each well in a point coverage.
# Requirements: ArcInfo Workstation
# Author: ESRI

# Import system modules
import arcpy
from arcpy import env

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

# Set local variables
inCover = "wells"
outCover = "C:/output/wellareas"

# Execute Thiessen
arcpy.Thiessen_arc (inCover, outCover, "")

Environments

Related Topics

Licensing Information

ArcView: No
ArcEditor: No
ArcInfo: Requires ArcInfo Workstation installed

Published 6/8/2010