[GRASS-user] [GRASSLIST:1065] Re: v.clean doesn't create dbf

[Carlos "Guâno" Grohmann]

Thanks Maciek and Hamish, I managed to create the table and populate
with cats after some help reading, after I send the mesg yesterday.

There´s another problem now... v.surf.rst doesn't work when I try to
calculate the DEM from these points, it gives me an error msg about
missing values in the collumn, but the table is complete...

I'll try to recompile the latest CVS tomorrow and see if it works.

Carlos

On 5/11/06, Hamish <hamish_nospam at yahoo.com> wrote:
> > I had these maps in old GRASS format, so I converted them. Now I have
> > two vector maps, one for contours and one for drainage. I want to
> > calculate a new DEM from the intersections of contours and drainage.
> > So I did, first v.patch, to put all in one file, then v.clean, to get
> > the intrsections. Now I want to sample the raster altitude at the
> > points.
>
> v.patch can't propigate the table if the input vector's tables aren't
> an exact match. Hopefully it keeps the lines' cat numbers though?
>
> use "v.clean tool=break error=intersections" to get the intersection
> points as their own map(??), then v.db.addtable or db.execute to create
> a new table including a 'column="alt double"' column. (or add the column
> later with v.db.addcol). Then you can use v.what.rast to fill in the
> values.
>
>
> good luck,
> Hamish
>


-- 
+-----------------------------------------------------------+
              Carlos Henrique Grohmann - Guano
  Geologist M.Sc  - Doctorate Student at IGc-USP - Brazil
Linux User #89721  - carlos dot grohmann at gmail dot com
+-----------------------------------------------------------+
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