Vector topology cleaning

From GRASS-Wiki
Revision as of 17:39, 6 December 2011 by Neteler (talk | contribs)

Jump to: navigation, search

Q: How can I patch to fitting area maps with have been digitized separately and correct the topology? I observe that the shared polygon boundaries do not perfectly match...

Polygon vector map with topology problems

A: You can use v.clean for this.

Tools to consider:

  • TBD
  • ...

Q: How about self-intersecting lines and boundaries?

A: In the GRASS topological model self-intersecting lines are allowed, self-intersecting boundaries are not. Self-intersecting lines are ok e.g. for modules, e.g. to represent a bridge of a secondary road over a highway.

Note: There are some modules that do not like self-intersecting lines, e.g with v.buffer problems are expected.

See also