Trying to convert lines to polygons

[Agustin Lobo]

Hi!

Did you ever get to solve your problem?
I have a similar one importing a vector file
from A/I and geting lots of

PNT_TO_AREA failed: (28.041898, 36.882575) (Category 312)
PNT_TO_AREA failed: (-3.907297, 36.889162) (Category 313)
WARNING: area 679 label: 3178 matched another label: 314.

when running v.suport.

Agus          


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Dr. Agustin Lobo
Instituto de Ciencias de la Tierra (CSIC)
Lluis Sole Sabaris s/n
08028 Barcelona SPAIN
tel 34 93409 5410
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alobo at ija.csic.es
http://pangea.ija.csic.es/alobo


On Tue, 23 Feb 1999, Juan Baquls wrote:

> >The areas you create are not labelled (means that v.to.rast will give
> >you an empty file).  Snapping doesn't help.  Labelling is done via the
> >dig_att file : an entry for each area or line to be labelled made as
> >following for an area :
> >
> >A xxxxxx yyyyyy nn
> >
> >A means area (L for line), xxxxx and yyyyyy are the coordinates of the
> >label point (inside the area), and nn is the area number (> 0).
> >
> >Try to use v.digit after running v.support.  There is some command
> >to show unlabelled areas.  You can label each area interactively.
> >If some areas cannot be labelled, look at the nodes around them (and
> >zoom)
> >If there is some green dots, that's mean that a line doesn't match
> >any other. You can snap manualy lines together, solving the unclosed
> >polygon problem. After that rerun v.support to label area, and=20
> v.to.rast
> >will work.
> >
> >If you have some labels in dxf, you can import them in the dig_att file
> >with respect to the format showed above (v.digit is sometimes boring=20
> :-)
> >
> >--=3D20
> >Michel Wurtz    ENGEES - Laboratoire Territoires & Environnement
> >                1, quai Koch - BP 1039, F-67070 STRASBOURG cedex
> >                Tel: +33 03.88.24.82.45  Fax: +33 03.88.37.04.97
> 
> The problem is that I want to get the polygon topology of a very big DXF=20
> (snapping manually all the lines would be VERY VERY boring). In the=20
> other hand, the results must in a vector (not raster) format, because I=20
> want to export the results into another vector format; because of that I=20
> can't use v.to.raster (I would get a raster map).=20
> 
> Is there any way to close all the areas automatically into a vector=20
> map?.=20
> 
> Attached to this message is a little example of my DXF. I would be very=20
> grateful if someone could explain me the steps to do in order to obtain=20
> a vector map with all the areas contained in the DXF.
> 
> Thank tou very much for your time!!!
> 
> Juan Ba=F1uls
> 
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