pointGridsInPolygons

Point Grids In Polygons

Generates uniform (regularly spaced) points located in the polygons of the input polygon dataset. The distance between the points for each polygon can be the same or different - based on the values in a numeric field of the input polygon feature class. The user can specify the rotation angle for the resulting point grid.

Inputs:

A polygon feature class
The distance between the points for each polygon can be input in one of the following ways
- A numeric field which values will be used to get the distance between points for each polygon.
- A constant number defining the distance between points for all polygons.
Rotation angle
- Constant for all polygons - (in degrees starting from North clockwise)
- From field - different rotation angle for each field (in degrees starting from North clockwise)
- Along the longest axis of each polygon
- Along the longest side of each polygon

Outputs:

New Point feature class.
The following fields are added to the attribute table of the resulting feature class.
- [ET_ID] - the ID of the original polygon

Illustration:

Distance between points = 10, Rotational angle = 0

Original polygons labeled with the values in field to be used as a source for getting the distance between the points. Rotational angle = "Along the longest Side"

Original polygons labeled with the values in field to be used as a source for getting the distance between the points

Running Programmatically

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Parameters

Expression	Explanation
Function Name	PointGridsInPolygons
<input dataset>	A String representing the input layer. Must be of Polygon type.
<output dataset>	A String - the full name of the output layer.
{Size}	A Double representing distance between the grid points.
{Size Field}	A String representing the name of a field in the in the attribute table of the input dataset. The field has the values for the distance between the grid points.
<Angle From>	Required. A String -This parameter defines what will be the source rotation of the grids: "Constant" - user defined value for all grids. "FromField" - different for each grid based on a value in the attribute table. "LongestAxis" - the grids will be oriented along the longest axis of each polygon. "LongestSide" - the grids will be oriented along the longest side of each polygon.
{Angle}	A Double representing the rotation angle of the grids
{Angle Field}	A String representing the name of a field in the in the attribute table of the input dataset field name. The field has the values for the angle of the grids to be created.

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	subprocess.call( [ETGWPath, "PointGridsInPolygons", "input dataset", "output dataset", "Size", "", "Angle From", "Angle", ""])
.NET using ETGWRun.exe	StartInfo.FileName = ETGWPath StartInfo.Arguments = "PointGridsInPolygons" "input dataset" "output dataset" "Size" "" "Angle From" "Angle" ""
.NET using ETGWOutX.dll	PointGridsInPolygons(input dataset, output dataset, Size, "", Angle From, Angle, "")
ArcPy	arcpy.PointGridsInPolygons(input dataset, output dataset , "Size", "", "Angle From", "Angle", """)

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.

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