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Clean Polyline Wizard

Ensures topological correctness of a polyline feature data set.

Inputs:

• A polyline feature layer
• Fuzzy tolerance

Outputs:

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

Notes :

• 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"
• A Fuzzy tolerance of  0 may be used if the original shapes have to be preserved exactly the same. In this case only the intersections will be created
• 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 feature class with classified nodes.

Example:

Input Layer ( with analyzed nodes )	After Clean ( with analyzed nodes )
Duplicates layer ( The Clean layer as a background )