CleanPolylineWizard

Clean Polylines

Ensures topological correctness of a polyline feature data set.

New topologically correct Polyline dataset
- Nodes will be created in all intersection points
- Redundant data (vertices and nodes closer to each other than the fuzzy tolerance) will be eliminated.
- Each set of duplicate lines (closer to each other than the fuzzy tolerance) will be replaced by a single polyline. This polyline will carry the attributes of one of the original polylines
- The attributes of the input data set are preserved.

Optional Polyline layer that identifies the duplicates in the input data set.
- The duplicates layer has all the fields from the input data set.
- The attributes of the polylines are these that have not been preserved in the clean layer. Example:. If two polylines with attributes "A" and "B" are running on top of each other. The clean layer will contain only one of them e.g. "A". The duplicates layer will contain the other one -"B"

The default Fuzzy tolerance is calculated from the extents of the input layer using the formulae (W + H) / 2000000 where W and H are the with and height of the extent envelope.
Larger values of the Fuzzy tolerance may be used to clean some bigger Over and Under shoots, but it might lead to unwanted approximation of the input shapes. The better option is to use Fuzzy tolerance close to the default and then clean the remaining Dangling Nodes with the "Clean Dangling Nodes Wizard"
Use Export Nodes Wizard to check the status of a data set. It will analyze the nodes of a polyline layer and will create a Point layer with classified nodes.

Input Layer ( with analyzed nodes )

cleanPl_before.jpg (16200 bytes)

After Clean ( with analyzed nodes )

cleanPl_after.jpg (16184 bytes)

Duplicates layer ( The Clean layer as background )

cleanPl_over.jpg (7793 bytes)

Parameters

Expression	Explanation
Function Name	CleanPolylines
<input dataset>	A String representing the input layer. Must be of Polyline type.
<output dataset>	A String - the full name of the output layer.
<Fuzzy Tolerance>	A Double representing the Fuzzy Tolerance.
<duplicates dataset>	A String - the full name of the output layer containing the duplicates.
{Sort Field}	A String representing a field to be used to sort the data before processing. The first features in the input dataset after sorting using that field will have priority during the cleaning process.

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, "CleanPolylines", "input dataset", "output dataset", "Fuzzy Tolerance","duplicates dataset", "Sort Field"])
.NET using ETGWRun.exe	StartInfo.FileName = ETGWPath StartInfo.Arguments = "CleanPolylines" "input dataset" "output dataset" "Fuzzy Tolerance" "duplicates dataset" "Sort Field"
.NET using ETGWOutX.dll	CleanPolylines(input dataset, output dataset, Fuzzy Tolerance,duplicates dataset, Sort Field)
ArcPy	arcpy.CleanPolylines(input dataset, output dataset, "Fuzzy Tolerance","duplicates dataset", "Sort 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.