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Target layer: Polygon Layer

Description:  Ensures topological correctness of the target polygon layer.

Steps :

1. Set a polygon layer as a target in the Editor.
2. Click the ET Clean Polygons Command. Enter the Fuzzy tolerance in the dialog box that will open.

Results:

• Redundant data (overlaps and gaps smaller than the fuzzy tolerance) will be eliminated
• The overlaps greater than the fuzzy tolerance are converted into new polygons.
• Every new polygon carries the attributes of one of the source overlapping polygons

Advantages: 

• Can be used in any version of ArcGIS (8.1 and above)
• Can be used  with any type of  license (ArcView, ArcEditor and ArcInfo)

Notes: 

• The command is global and will be applied to the entire target dataset.
• 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.
• ArcGIS 9.2 and above: The Fuzzy tolerance cannot be smaller than the XY resolution of the dataset to be processed.
• Larger values of the Fuzzy tolerance may be used to clean some bigger Gaps and Slivers, 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 Gaps and Slivers with the appropriate tools available in ET GeoTools.

Copyright © Ianko Tchoukanski