[GRASS-user] I: problems with v.edit

GRASS GRASS user
1

Hi,

2009/1/20 chiaraercoli@tiscali.it <chiaraercoli@tiscali.it>:

I have a problem with v-edit.
I have to break a vector line
into two parts near a point. I gave this command:

v.edit map=ret_125
layer=1 type=line tool=break thresh=$ris_edit coords=$x,$y snap=no

where " $ris_edit " depends on the resolution of the DEM raster

map,

"$x" and "$y" are the coordinates of the point.

are you sure that threshold value is enough to select vector feature
which you want to break?

v.edit map=ret_125 tool=select thresh=$ris_edit coords=$x,$y

?

Martin

--
Martin Landa <landa.martin gmail.com> * http://gama.fsv.cvut.
cz/~landa
*

v.edit map=ret_125 tool=select thresh=100 coords=$x,$y

I send you the line, ret_125, and the point, punto_minimo.
Thanks for all,
  Chiara .

     __________________________________________________________Regali di San Valentino. Solo su Tiscali Shoppinghttp://shopping.tiscali.it/c-100492023-regali-per-san-valentino.html

(attachments)

punto_minimo.zip (1.13 KB)
ret_125.zip (2.35 KB)

2

Ciao Chiara,

2009/1/27 chiaraercoli@tiscali.it <chiaraercoli@tiscali.it>:

I have a problem with v-edit.
I have to break a vector line
into two parts near a point. I gave this command:

v.edit map=ret_125
layer=1 type=line tool=break thresh=$ris_edit coords=$x,$y snap=no

where " $ris_edit " depends on the resolution of the DEM raster

map,

"$x" and "$y" are the coordinates of the point.

are you sure that threshold value is enough to select vector feature
which you want to break?

v.edit map=ret_125 tool=select thresh=$ris_edit coords=$x,$y

v.out.ascii punto_minimo
861020.54634226|7317237.09688885|1

v.edit ret_125 tool=select coord=861020.54634226,7317237.09688885 thresh=15 --q
1

OK, feature selected

v.edit ret_125 tool=break coord=861020.54634226,7317237.09688885
thresh=15 snap=no type=line layer=1

OK, feature broken

Check:

v.edit ret_125 tool=select coord=861020.54634226,7317237.09688885 thresh=15 --q
1,2

So where is the problem? :wink:

Martin

--
Martin Landa <landa.martin gmail.com> * http://gama.fsv.cvut.cz/~landa