On Sat, Aug 6, 2011 at 9:24 PM, DelphineJB <[email protected]> wrote: > Bonjour, > > I do apologise for this problem it must have been posted before but I > couldn't get an answer in the archive. > > I am having problems to see vectors I have added height to with v.extrude . > The trick is that I am actually using the e.g. given in NETELER, M and H. > MITASOVA /Open Source GIS a GRASS GIS Approach/ with the North Carolina > sample data. So in theory, this example should really be working... > > Here is what I did > > g.region rast=el_D792_6m -p > > v.extract P079215 out=bldg_resid_a where="layer='BLDG_RESID_BL'" > v.extract P079215 out=bldg_cmcl_a where="layer='BLDG_COMMER_BL'"
There was an omission in that part of the book: http://www.grassbook.org/errata_menu3rd.php You need to convert the vector types first. > v.extrude -t bldg_resid_a out=bldg_resid_a_3d height=10 elev=el_D792_6m > v.extrude -t bldg_cmcl_a out=bldg_cmcl_a_3d height=15 elev=el_D792_6m > > g.region rural_1m -p > nviz elev_lid792_1m col=ortho_2001_t792_1m > vect=bldg_resid_a_3d,bldg_cmcl_a_3d > > I am using Grass 6.4.1 with the python GUI on Windows 7 > > Now the infamous result is just some line on what should be the height of > the building, like if NVIZ read it as lines rather than 3D surface... With the correction, it will work. Markus _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
