hmm... okay... so I finally understood that we have multiple "DEM" format... in fact my source data is in "GeoTiff DEM" format which seem to be quite new (coming with geotiff 6.0 ?)... And I don't know is Gdal can handle this kind of data...
I also found the same data in ArcInfo ASCII format... but when trying to use this in osgdem I've got "infinite peaks" even with small "-v" option... I guess there is a problem in the readen data. Does anybody knows where I coudl find free SRTM 90m data in USGS DEM format on the net ??? Manu. 2007/6/7, Emmanuel Roche <[EMAIL PROTECTED]>:
after -d :-) but even with something like -v 10000 I sess strictly no elevation :-(... Manu. 2007/6/7, J.P. Delport <[EMAIL PROTECTED] >: > > Hi, > > are you using them after -d or -t? > > jp > > Emmanuel Roche wrote: > > By the way, does any one knows how to do this ? (convert GeoTiff > > elevation to DEM... or tell osgDem & GDAL than those .tif files > contains > > elevation data)... > > > > > > Manu. > > > > > > 2007/6/7, Emmanuel Roche < [EMAIL PROTECTED] > > <mailto:[EMAIL PROTECTED]>>: > > > > Thanks ! this seem to work great :-) > > > > now I just have to find how to convert my elevation tif files to a > > .dem file : since apparently GDAL is not handling the elevation > > information with my configuration... snif.. > > > > Manu. > > > > > > 2007/6/7, J.P. Delport <[EMAIL PROTECTED] > > <mailto:[EMAIL PROTECTED] >>: > > > > Hi, > > > > you can add info with gdal_translate, e.g. I have saved this > > command for > > myself: > > > > #fix a tiff after its been through the gimp > > gdal_translate -a_srs WGS84 -a_ullr 19.1 -32.2 19.2 -32.3 > infile.tif > > outfile.tif > > > > cheers > > jp > > > > Emmanuel Roche wrote: > > > hmmm don't you really have any idea what the commands was > like > > ? snif :-( > > > > > > Manu. > > > > > > > > > 2007/6/7, Robert Osfield < [EMAIL PROTECTED] > > <mailto:[EMAIL PROTECTED]> > > > <mailto: [EMAIL PROTECTED] > > <mailto: [EMAIL PROTECTED]>>>: > > > > > > Hi Manu, > > > > > > This is a GDAL error. In the case of png's they don't > > actually have > > > any geo-referencing info like GeoTiff's have, so perhaps > > this is a > > > contribution. > > > > > > Try running the GDAL commands for re-projecting the > data, > > I'm afraid I > > > can't remember them off hand. Another thing you could > try > > is to use > > > GDAL to convert to a GeoTiff and add the geo ref data > in. > > > > > > Robert. > > > > > > On 6/7/07, Emmanuel Roche < [EMAIL PROTECTED] > > <mailto: [EMAIL PROTECTED]> > > > <mailto:[EMAIL PROTECTED] > > <mailto: [EMAIL PROTECTED]>>> wrote: > > > > Hello, > > > > > > > > I'm trying to build an high definition model with > osgdem > > but I get > > > this > > > > error when trying to add texture data : > > > > > > > > ERROR 1: Unable to compute a transformation between > > pixel/line > > > > and georeferenced coordinates for > > ../128K_BMNG/level5/tx_0_1.png. > > > > There is no affine transformation and no GCPs. > > > > Failed to reproject../128K_BMNG/level5/tx_0_1.png > > > > > > > > any idea where this could be coming from ? > > > > > > > > Manu. > > > > > > > > > > > > _______________________________________________ > > > > osg-users mailing list > > > > [email protected] > > <mailto:[email protected]> > > <mailto:[email protected] > > <mailto:[email protected]>> > > > > http://openscenegraph.net/mailman/listinfo/osg-users > > <http://openscenegraph.net/mailman/listinfo/osg-users> > > > > http://www.openscenegraph.org/ > > > > > > > _______________________________________________ > > > osg-users mailing list > > > [email protected] > > <mailto:[email protected]> <mailto: > > [email protected] <mailto: > [email protected]>> > > > http://openscenegraph.net/mailman/listinfo/osg-users > > > <http://openscenegraph.net/mailman/listinfo/osg-users > > < http://openscenegraph.net/mailman/listinfo/osg-users>> > > > http://www.openscenegraph.org/ > > > > > > > > > > > > > ------------------------------------------------------------------------ > > > > > > _______________________________________________ > > > osg-users mailing list > > > [email protected] <mailto: > [email protected]> > > > http://openscenegraph.net/mailman/listinfo/osg-users > > > http://www.openscenegraph.org/ > > > > -- > > This message is subject to the CSIR's copyright, terms and > > conditions and > > e-mail legal notice. 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