Re: [osg-users] [vpb] rendering problem

Hi, Thank you for the information! Indeed, the coord system of my dem is in degrees. gdal_info give this : Driver: USGSDEM/USGS Optional ASCII DEM (and CDED) Files: 104n04_0100_deme.dem Size is 1201, 1201 Coordinate System is: GEOGCS[NAD83, DATUM[North_American_Datum_1983,

[osg-users] [vpb] rendering problem

Hi, Is it normal to have a rendering like this (enclose file) typing osgdem.exe -d 104n04_0100_deme.dem -l 5 -o 104n04_0100_deme.osg? When I add --geocentric, I don't have problem in rendering. Thank you! Cheers, Lucie[/img] -- Read this topic online here:

Re: [osg-users] [vpb] rendering problem

Hi lucielemon, it looks like a unfinished database where the full LOD is not reached. have you tried to rum osgdem without the lLOd limitation to Level 5 ? osgdem.exe -d 104n04_0100_deme.dem -o 104n04_0100_deme.osg Cheers, Torben -- Read this topic online here:

Re: [osg-users] [vpb] rendering problem

Hi, Thank you for your reply! No I have not tried without limitation because I think it will take considerable time, isn't it? Cheers, lucie -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=29688#29688

Re: [osg-users] [vpb] rendering problem

Hi, On the other hand, I don't understand why I don't have the same problem when I add --geocentric. Could you explain it? Thank you! Cheers, lucie -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=29689#29689

Re: [osg-users] [vpb] rendering problem

Hi Lucie, It looks like a numerical precision issue on the terrain due to a very small XY range. Is the coord system of your dem in degrees? Using --geocentric introduces Earth Center Earth Fixed coordinates which are in meters which avoids the issue numerical issues. Also changing the target

Re: [osg-users] [vpb] rendering problem

Hi, it looks like a problem with normals. I don't know if the corresponding code is the same for geocentric and flat databases. Of course, if you finish your database build without LOD limitation, it takes more time than a inclomplete DB :) My first VPB attempts with incomplete VPB runs

Re: [osg-users] [vpb] rendering problem

Hi, Thanks for your reply Robert. I don't know if my dem is in degrees, I found it in this site : http://www.geobase.ca/geobase/en/index.html. I will try to put the coordinate system into meters. Cheers, lucie -- Read this topic online here:

Re: [osg-users] [vpb] rendering problem

Hi Lucie, I would recommend getting familiar with the GDAL tools such as gdalinfo, this command line app will report all the geospatial coords on your data. Robert. On Mon, Jul 5, 2010 at 4:41 PM, lucie lemonnier lucielemonn...@hotmail.fr wrote: Hi, Thanks for your reply Robert. I don't know