[GRASS-user] using v.line.center

[Manuel Sangiao]

Thanks Hamish for your help,

that was helpful. But now, when I use *v.line.center,* I get the following
error:

WARNING: Cannot get point on line: cat=927 offset=89379.795093 (line
lenght=2.219076)
P 927 927 89379.795093

I guess the reason for this error is the projection (mapset?) unit. The
projection unit(s) in my mapset is degree(s). And the length units are
meters.

So, how can i change the mapset units. Should I create another mapset with
the properly units?

regards

Manuel






2008/6/5, Hamish <hamish_b at yahoo.com>:
>
> Manuel Sangiao wrote:
> > in order to use *v.line.center* properly I use* v.category*
> > to adjust category assignment.
> >
> > As a result I get:
> >
> > GRASS 6.2.2 (admeurop):> v.category in=bound1 layer=2 out=boundary1 --o
>
> ....
>
> > Number of lines : 0
> > Number of boundaries: 592
>
> ....
>
> > Then I use *v.line.center* to get the middle points of the
> > boundaries (That's right?). Then I get the following result:
>
> ....
> > 0 records updated/inserted
> ....
>
> > So, I get nothing
> >
> > Any can me help? I don't understand this result.
>
>
>
> use v.type to convert boundaries to lines first.
>
>
>
> Hamish
>
>
>
>
>
>
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