Get your spatial datasets clean...

 

Clean polyline datasets-identify and correct topology problems.

• How to identifyTopologyProblems in a polyline dataset?

• How to correctTopologyProblems in a polyline dataset?

• How to Create polygons from polylines?

Take the start and end points of all polylines for classification. And then proceed.

• Dangling-only one polyline ends in this node -- undershoots and overshoots
• Pseudo-two lines meet in this node
• Regular-three or more polylines are connected to this node

Export nodes -- clean polylines -- clean dangling nodes -- clean pseudo nodes -- building polygons

 

Clean polygon datasets-the overlay approach.

 

• Identify overlaps and convert them to polygons

• Identify gaps and convert them to polygons

• Identify slivers and clean them

Clean polygon datasets-emulating the coverage approach.

 

• Convert the polygons to polylines.

• Clean the polylines.

• Build Back the polygons.

• Eliminate the "gap" and "Overlap" polygons.