Nodes

Export Nodes

Running programmatically

Analyzes the nodes of a polyline layer and exports them as a point layer.

Inputs:

A polyline feature layer
Types of nodes to be exported

Outputs:

New point layer
- Contains points representing the specified node types
  - Regular nodes - node where more than two polylines intersect
  - Pseudo nodes - occur where a single line connects with itself or where only two polylines intersect
  - Dangling nodes - unconnected nodes of dangling polylines
- Several fields are added to the point attribute table:
  - [ET_Type] - the type of node.
  - [ET_Valency] - the number of polylines that connect in the node. For a Dangling node Valency = 1, for a Pseudo node Valency = 2, for a Regular node Valency >=3
  - [PL_LINK1], [PL_LINK2] ...[PL_LINK9] carrying the values in the specified as a parameter link filed of the polylines that intersect in a node

Nodes

Running Programmatically

Parameters

Expression	Explanation
Function Name	ExportNodes
<input dataset>	A String representing the input layer. Must be of Polyline type.
<output dataset>	A String - the full name of the output layer.
<Export Dangling>	A Boolean indicating whether the Dangling nodes will be exported
<Export Pseudo>	A Boolean indicating whether the Pseudo nodes will be exported.
<Export Regular>	A Boolean indicating whether the Regular nodes will be exported
<Link Field>	A String representing the name of the field which values will be used as links between the nodes and the source polylines

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, "ExportNodes", "input dataset", "output dataset", "Export Dangling", "Export Pseudo", "Export Regular", "Link Field"])
.NET using ETGWRun.exe	StartInfo.FileName = ETGWPath StartInfo.Arguments = "ExportNodes" "input dataset" "output dataset" "Export Dangling" "Export Pseudo" "Export Regular" "Link Field"
.NET using ETGWOutX.dll	ExportNodes(input dataset, output dataset, Export Dangling, Export Pseudo, Export Regular, Link Field)
ArcPy	arcpy.ExportNodes(input dataset, output dataset, "Export Dangling" , "Export Pseudo", "Export Regular", "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.