Segments to polygons

Algorithm

The Segments to Polygons operation automatically polygonizes a supposedly error free segment map. The operation is designed to be used after you have imported vector files from another package. All segments in the segment map must be connected to other segments or to themselves (islands) by nodes; dead ends are not allowed. A mask can be specified to polygonize specific segments.

Process:

  1. All segments as specified in the mask are copied to the output map.
  2.  

  3. Segment check and polygonization:
  4.  

    1. When using topological polygonization:
    2.  

       

    3. When using non-topological polygonization:
    4.  

     

  5. Assigning names to polygons:
  6.  

    When using:

See also: