On 30/01/15 12:16, Helmer Schack-Kirchner wrote:
Dear grass-user members,
to identify nodes of lines and to analyse the geometry of line
crossings the output of the dump of v.build seems to be very useful.
However I do not benefit fully of this data, because I did not find any
explanation of the output format. Where can I find a documentation?
Check here:
http://grass.osgeo.org/programming7/vlibTopology.html
notably the section 'Body (nodes, lines, areas, isles)'
This should make it clear. Another way to help understand is to actually
display the topology info with the map, e.g.:
d.vect roadsmajor display=shape,topo,dir
(i.e. check the boxes 'Display topology information' and 'Display
direction of linear features' in the vector display GUI).
Moritz
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