Build Thiessen Polygons

Running programmatically

Builds Thiessen Polygons from a feature layer

Thiessen (Voronoi) polygons define individual areas of influence around each of a set of points. Thiessen polygons are polygons whose boundaries define the area that is closest to each point relative to all other points. They are mathematically defined by the perpendicular bisectors of the lines between all points



Notes :

Examples of use:


Thiessen - Buffer Distance = 0

Thiessen - Buffer Distance > 0

Running Programmatically

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Expression Explanation
Function Name BuildThiessen
<input dataset> A String representing the input layer. Must be of Polygon type.
<output dataset> A String - the full name of the output layer.
{Buffer Distance} A Double representing the distance to buffer the input extent (in the units of the spatial reference of the input dataset.
{Add Attributes} A Boolean that indicates whether the attributes of the input features are to be transfered to the thiessen polygons.

Running the function

ETGWPath used in the table below is the  full path to ETGWRun.exe (E.G. "C:\Program Files\ETSpatial Techniques\ETGeo Wizards\ETGWRun.exe")

Language Syntax
Python[ETGWPath, "BuildThiessen", "input dataset", "output dataset", "Buffer Distance", "Add Attributes"])
.NET using ETGWRun.exe StartInfo.FileName = ETGWPath
StartInfo.Arguments = "BuildThiessen" "input dataset" "output dataset" "Buffer Distance" "Add Attributes"
.NET using ETGWOutX.dll BuildThiessen(input dataset, output dataset, Buffer Distance, Add Attributes)
ArcPy arcpy.BuildThiessen(input dataset, output dataset, "Buffer Distance", "Add Attributes")


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