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   v.net is used for vector network maps maintenance. It reports about the
   current network graph status. It also permits to globally insert
   missing nodes and to connect unconnected nodes to the graph within a
   given distance threshold.

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   If vector editing is required to modify the graph, v.digit or v.edit
   can be used. Separately, [1]Linear Referencing System is available in
   GRASS.

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   Spearfish based examples:

   Create nodes globally for all line ends and intersections:

v.net in=streams out=streams_node

   Merge in nodes from a separate map within given threshold:

echo "1|601653.5|4922869.2|start
2|593330.8|4924096.6|end" | v.in.ascii cat=1 x=2 y=3 out=startend col="cat inte
ger, \
                         east double precision, north double precision, label v
archar(43)"

#create lines map connecting points to network (on layer 2)
v.net myroads points=startend out=myroads_net op=connect thresh=200

СÐ. ТÐÐÐÐ

   [2]v.digit, [3]v.edit, [4]v.net.iso, [5]v.net.path, [6]v.net.steiner,
   [7]v.net.salesman

ÐÐТÐРЫ

   Radim Blazek, ITC-Irst, Trento, Italy
   Martin Landa, FBK-Irst, Trento, Italy

   Last changed: $Date: 2007-12-17 07:45:01 -0600 (Ðн, 17 дек 2007) $

ÐвÑÐ¾Ñ Ð¿ÐµÑевода

References

   1. file://localhost/root/tmp/2/fin/lrs.html
   2. file://localhost/root/tmp/2/fin/v.digit.html
   3. file://localhost/root/tmp/2/fin/v.edit.html
   4. file://localhost/root/tmp/2/fin/v.net.iso.html
   5. file://localhost/root/tmp/2/fin/v.net.path.html
   6. file://localhost/root/tmp/2/fin/v.net.steiner.html
   7. file://localhost/root/tmp/2/fin/v.net.salesman.html