Suenia: I would assume that the setting of elevation of the location causes the trouble.
Maybe this will help you to set up the loaction properly: Have a look at the code of r.in.srtm (http://grass.itc.it/grass63/manuals/html63_user/r.in.srtm.html) and/or consult the article by Markus Neteler about it in GRASS NEWS, VOl 3: http://grass.itc.it/newsletter/GRASSNews_vol3.pdf Cheers, Peter > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 8 Apr 2008 11:09:04 +0200 (CEST) > From: suenia <[EMAIL PROTECTED]> > Subject: [GRASS-user] Problems with NVIZ Volume (3dGRID) Visualization > ! > To: grass-user@lists.osgeo.org > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="iso-8859-1" > > Hello together ! > I have problems with NVIZ Volume visualization ! > Here I made an example generating a simple 3dgrid volume assuming > subterranean data and the failing of visualizing it. I would really appreciate > some help ! > Here the short workflow: > #Generating three surfaces which will model the volume. > GRASS 6.2.2 (4326):~ > r.mapcalc dem.t=0 > GRASS 6.2.2 (4326):~ > r.mapcalc dem.m=-10 > GRASS 6.2.2 (4326):~ > r.mapcalc dem.b=-20 > #My region settings > GRASS 6.2.2 (4326):~ > g.region -p3 > projection: 3 (Latitude-Longitude) > zone: 0 > datum: wgs84 > ellipsoid: a=6378137 es=0.006694379990141316 > north: 24:56:24N > south: 12:54S > west: 75:52:12E > east: 114:17:24E > top: 0.00000000 > bottom: -20.00000000 > nsres: 0:59:44.842105 > nsres3: 0:59:44.842105 > ewres: 1:00:39.789474 > ewres3: 1:00:39.789474 > tbres: 1 > rows: 38 > rows3: 38 > cols: 38 > cols3: 38 > depths: 20 > cells: 1444 > 3dcells: 28880 > > > #Generating the 3d grid volume > GRASS 6.2.2 (4326):~ > r.to.rast3 input=dem.b,dem.m,dem.t output=dem o > #Visualizing it! > GRASS 6.2.2 (4326):~ > nviz volume=dem elevation=dem.t > > When visualizing the 3dgrid volume dem, together with the raster > surfaces, only outlines in form of a cube volume are drawn whenever > navigating in > space !!! else nothing is seen but the raster surfaces. > When adding a new constant value, for example -10, to the raster volume, > an associated unique colored surface at the bottom of the cube is > observable. > So, I´m not sure about what could be the problem or my mistake in the > settings selection. > Furthermore I would like to know how to change g.region res3, > respectivly tbres for latitude longitude locations, when I try to change > res3<0:59:44.842105 or tbres my region get's destroyed, definitely. > For what stands the default value 1 of tbres ? > > Could somebody offer more information about vertical resolution > specifications for latitude longitude locations. > That works : Slovakia3d can be visualised by adding new constant > value for the raster volume. > > Many thanks ! > Suena > > -- Dr. Peter Löwe <[EMAIL PROTECTED]> Psssst! Schon vom neuen GMX MultiMessenger gehört? Der kann`s mit allen: http://www.gmx.net/de/go/multimessenger _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user