v.to.rast failures ( and related? v.support problem)

[Olga Waupotitsch]

In info.grass.user you write:


>I have two interrelated problems.

>1.	I have a vector layer consisting of a bunch of areas.  
>	When I do a v.to.rast, some of the areas don't transfer.  
>	I've checked with d.what.vect and some areas have a value 
>	on the vector version, but on the raster they have 
>	become (0) meaning nothing.
>	What could the problem be?

>2.	On another vector layer of areas, the v.to.rast works fine.
>	Except that after I do a "v.support option=build" a few
>	areas dont transfer.  The output looks like this:

>WARNING: area 5 label: 3 matched another label: 3.
>WARNING: area 32 label: 4 matched another label: 4.
>WARNING: area 3 label: 2 matched another label: 2.
>PNT_TO_AREA failed: (693691.590762, 3959246.402942) (Category 2)
>PNT_TO_AREA failed: (693700.923745, 3959055.076807) (Category 3)
>PNT_TO_AREA failed: (693685.767299, 3959246.756544) (Category 2)
> Number of lines:   113
> Number of nodes:   90
> Number of areas:   32
> Number of isles:   10
> Number of atts :   35
> Number of unattached atts :   3
> Snapped lines  :   0

>	The areas that dont transfer are the "PNT_TO_AREA" failures
>	which makes sense, but why does it work if I DON'T do
>	v.support?
>	Sometimes it seems to help to use v.digit to break,remove,
>	snap, label the areas, but only some times.
>	Why do some labelled areas become unlabelled (unattached atts)
>	when I do a v.support?
>	And what does the WARNING: area 5 .. mean?

>=======================================================
>  ///////    Bjorn Svensson
>  //    |
>  / <---@    Department of Geography
>  |      >   University of California, Santa Barbara
>  |     <    Santa Barbara, CA 93106, USA
>  |   __X 
>  \  |       e-mail : bjorn at geog.ucsb.edu
>=======================================================

About problem number 1 I will post a message in a second

About problem number 2:

Please ftp this map to me
(moon.cecer.army.mil) grass/incoming directory
I would like to look at this vector map.
Olga