getAdjacentPolygons

Get Adjacent Polygons

Determines for each polygon of the dataset the adjacent polygons and stores the result in the attribute table as a comma delimited string.

A polygon feature layer.
Link Field - the field which values will be used to save in the adjacency string

New polygon feature class. Two fields will be added to the attribute table
- [ET_Adj] - the field that will contain the adjacency string.
- [ET_Count] - the count of the adjacent polygons for each polygon

Notes:

If the input polygon layer has overlaps it is strongly recommended to use the Clean Polygons function beforhand
A polygon is considered adjacent to another polygon only if the two polygons have a common boundary. Two polygons that share only a common point are not considered adjacent

Example:

Input polygons and resulting attributes for each input polygon

State Name	ET Adj	ET Count
Arizona	California, Sonora, Nevada, NewMexico, BajaCalifornia, Utah	6
Colorado	NewMexico, Utah, Wyoming, Kansas,Nebraska, Oklahoma	6
New Mexico	Chihuahua, Sonora, Arizona, Colorado, Oklahoma, Texas	6
Utah	Nevada, Arizona, Colorado, Wyoming, Idaho	5

Parameters

Expression	Explanation
Function Name	PolygonAdjacency
<input dataset>	A String representing the input layer. Must be of Polygon type.
<output dataset>	A String - the full name of the output layer.
{Link Field}	A Double representing the Generalization tolerance (in the units of the spatial reference of the input layer.

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	subprocess.call([ETGWPath, "PolygonAdjacency", "input dataset", "output dataset", "Link Field"])
.NET using ETGWRun.exe	StartInfo.FileName = ETGWPath StartInfo.Arguments = "PolygonAdjacency" "input dataset" "output dataset" "Link Field"
.NET using ETGWOutX.dll	PolygonAdjacency(input dataset, output dataset, Link Field)
ArcPy	arcpy.PolygonAdjacency(input dataset, output dataset, "Link Field")

Notes:

<> - required parameter
{} - optional parameter
See examples for Python , .NET or ArcPy
The argument separator for StartInfo.Arguments is space. If a string might contain a space, you need to double quote it.