aggregatePolygons

Aggregate Polygons

Combines the polygons from the input layer that are within the user specified distance into new polygons. Can be used also to generalize buildings.

A polygon layer
Aggregation distance. The polygons that are closer to each other than this distance will be combined
Minimum area of the holes to be preserved - all holes with area less than this tolerance will be removed.

The new layer will not have any attributes. The Transfer Attributes function can be used to get summarized attributes from the original polygons.
The Aggregation distance and the Minimum area of holes should be specified in the units of the spatial reference of the input layer
If no Minimum area of holes is specified only the holes with area smaller than 2 x Aggregation distance x Aggregation distance will be removed

Input Dataset

Result (No Minimum area of holes specified)

Result (Minimum area of holes specified)

Input Dataset

Input Buildings

Aggregate distance = 1 meter

Aggregate distance = 5 meters

Aggregate distance = 10 m

Aggregate distance = 20 m

Parameters

Expression	Explanation
Function Name	AggregatePolygons
<input dataset>	A String representing the input layer. Must be of Polygon type.
<output dataset>	A String - the full name of the output layer.
<Aggregation Distance>	A Double representing the aggregation distance. The polygons that are closer to each other than this distance will be combined.
{Area Tolerance}	A Double representing the minimum area of holes to be preserved. All holes with area less than this tolerance will be removed.

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, "AggregatePolygons", "input dataset", "output dataset", "Aggregation Distance", "Area Tolerance"])
.NET using ETGWRun.exe	StartInfo.FileName = ETGWPath StartInfo.Arguments = "AggregatePolygons" "input dataset" "output dataset" "Aggregation Distance" "Area Tolerance"
.NET using ETGWOutX.dll	AggregatePolygons(input dataset, output dataset, Aggregation Distance, Area Tolerance)
ArcPy	arcpy.AggregatePolygons(input dataset, output dataset, "Aggregation Distance", "Area Tolerance")

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.