Markus Neteler wrote:
Luigi Ponti wrote on 08/23/2007 05:07 PM:
Dear list,
Is there a way to "extrude" 2D vector points to 3D points based on
attribute column values, similar to what I have read v.extrude can do
with lines? I have tried to use v.extrude with points but an empty 3D
vector was created.
ciao Luigi:
1. use 'v.db.addcol' to add also an x and y column
2. then upload also x and y to attribute table with 'v.to.db'
(so you have x,y,z there as *attribute*)
3. run 'v.in.db' to re-generate the point map as 3D map, indicating
x=xcol y=ycol z=zcol
Thanks Markus!
Just finished to try out your method for 2D point "extrusion", and it
works OK.
I thought that the v.out.ascii.db script would hide some of the steps
you described. However, while Maciek's approach was based on
'v.out.ascii'/'v.in.ascii' plus 'db.select', yours was based only on
*db* commands (no intermediary text file).
Thanks both for your help/teaching,
Luigi
_______________________________________________
grassuser mailing list
[email protected]
http://grass.itc.it/mailman/listinfo/grassuser
