[GRASS-user] v.distance warning (WARNING: more cats of to_layer)

[Corrado]

Dear Martin,

does that mean that there are several areas (that is more than one) in the to 
vector that satisfy the condition (for example: dmax=100) for each point in 
the from vector?

On Wednesday 12 March 2008 15:23:46 Martin Landa wrote:
> Hi,
>
> in your case the vector map (given as 'to' in v.distance) contains
> some areas (bunch of boundaries and centroid inside). Category number
> of area is assigned to the centroid. Geometry feature (point, line,
> boundary, centroid, face or kernel) can have more categories in
> general. The message from v.distance warns you that there are more
> categories assigned to the area (i.e. centroid) in given layer
> (to_layer). The last found category in given layer is taken for
> computation, maybe v.distance should be fixed to handle also multiple
> categories in one layer(?)
>
> Martin
>
> 2008/3/12, Corrado <ct529 at york.ac.uk>:
> > Dear Martin,
> >
> >  I do not understand what you mean. Could you please explain?
> >
> >  On Wednesday 12 March 2008 14:09:46 you wrote:
> >  > Hi,
> >  >
> >  > it means that given vector feature from 'to' map (layer 'to_layers')
> >  > has more then one category. Maybe it would make sense to change
> >  > warning text to something less cryptic.
> >  >
> >  > Martin
> >  >
> >  > 2008/3/12, Corrado <ct529 at york.ac.uk>:
> >  > > Dear Martin,
> >  > >
> >  > >  I am using 6.2.3.
> >  > >
> >  > >  On Wednesday 12 March 2008 13:31:49 you wrote:
> >  > >  > Hi,
> >  > >  >
> >  > >  > 2008/3/12, Corrado <ct529 at york.ac.uk>:
> >  > >  > >  what does the warning:
> >  > >  > >
> >  > >  > >  WARNING: more cats of to layer
> >  > >  > >
> >  > >  > >  mean, when you execute the command v.distance?
> >  > >  >
> >  > >  > which GRASS version are you using? I cannot find such kind of
> >  > >  > message in grass_trunk.
> >  > >  >
> >  > >  > Martin
> >  > >
> >  > > Best Regards
> >  > >  --
> >  > >  Corrado Topi
> >  > >
> >  > >  Global Climate Change and Biodiversity
> >  > >  Area 18,Department of Biology
> >  > >  University of York, York, YO10 5YW, UK
> >  > >  Phone: + 44 (0) 1904 328645, E-mail: ct529 at york.ac.uk
> >
> >  Best Regards
> >  --
> >  Corrado Topi
> >
> >  Global Climate Change and Biodiversity
> >  Area 18,Department of Biology
> >  University of York, York, YO10 5YW, UK
> >  Phone: + 44 (0) 1904 328645, E-mail: ct529 at york.ac.uk

Best Regards
-- 
Corrado Topi

Global Climate Change and Biodiversity
Area 18,Department of Biology
University of York, York, YO10 5YW, UK
Phone: + 44 (0) 1904 328645, E-mail: ct529 at york.ac.uk