[GRASS-user] Importing lines from database

[Hamish]

Richard Chirgwin wrote:
> I have a database containing pairs of points, each with lat/long. For
> convenience (there are lots of points) I would like to use this (and
> the distance between the points if necessary) to create a vector map 
> containing lines joining the points. This way, I don't have to
> hand-draw a couple of thousand lines.
> 
> I can't see any support in the database import ( v.in.db ) to do this
> - is there some way to create lines directly from my database?

You will have to do 'v.in.ascii -n format=standard'

L n
 x1 y1
 x2 y2
 ...
 xn yn


see v.in.mapgen for an example of automatically applying the number of
vertices with an awk command, but you can probably just paste that
first line in by hand.


Hamish



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