Hi Alejandro, VPB is only understand well referenced WGS84 formatted data. So I advice you to use referenced images to create your terrain, if you are not familiar with reference data manipulation on images you should download prepared referenced data from http://seamless.usgs.gov/index.php or http://geoengine.nga.mil/geospatial/SW_TOOLS/NIMAMUSE/webinter/rast_roam.htmlYou can find lots of web site to download these kind of data.
Best Regards. Umit Uzun 2008/10/27 Ralf Stokholm <[EMAIL PROTECTED]> > Hi Alejandro > Im not 100% here, but I think you still need to specify some sort of > projection basis, even plain lat lon uses some defenition of the geoid like > WGS84 og similar. > > Natrally it could be a problem with you GTiff file. > > What version of VPB OSG are you using? > > Brgs. > > Ralf > > 2008/10/27 Alejandro Aguilar Sierra <[EMAIL PROTECTED]> > >> Hi, >> >> Actually the data has no projections, it is in plain >> longitude/latitude coordinates. Which is the recomended projection for >> data about 1 or two degrees long so I can have it in kilometers? >> >> Regards, >> >> -- A. >> >> On Sun, Oct 26, 2008 at 2:04 AM, Ralf Stokholm <[EMAIL PROTECTED]> >> wrote: >> > Hi Alejandro >> > >> > It seams you are missing projection information in the createt geotiff >> file. >> > >> > VPB needs some sort of projection system information in the input or you >> > should specify the projection in the commandline for VPB >> > >> > It will be faster if you project your source data using ie gdalwarp, >> adal >> > translate can also encode the projection data if its missing and you >> know >> > what it should be. >> > >> > Brgs. >> > >> > Ralf Stokholm >> > >> > 2008/10/26 Alejandro Aguilar Sierra <[EMAIL PROTECTED]> >> >> >> >> Hello: >> >> >> >> I got DEM data from INEGI (Mexican Geographic Institute) and convert >> >> it to Geo Tiff. >> >> >> >> gdal_translate -of GTiff -co "TILED=YES" >> >> MDE-n200000s190000e0970000o0990000.bil volcanes.tif >> >> gdaladdo -r average volcanes.tif 2 4 8 16 32 >> >> >> >> gdalinfo volcanes.tif >> >> Warning 1: TIFFReadDirectory:volcanes.tif: Wrong "StripByteCounts" >> >> field, ignoring and calculating from imagelength >> >> Driver: GTiff/GeoTIFF >> >> Files: volcanes.tif >> >> Size is 7200, 3600 >> >> Coordinate System is `' >> >> Origin = (-99.000000000000000,20.000000000000000) >> >> Pixel Size = (0.000277777777778,-0.000277777777778) >> >> Image Structure Metadata: >> >> INTERLEAVE=BAND >> >> Corner Coordinates: >> >> Upper Left ( -99.0000000, 20.0000000) >> >> Lower Left ( -99.0000000, 19.0000000) >> >> Upper Right ( -97.0000000, 20.0000000) >> >> Lower Right ( -97.0000000, 19.0000000) >> >> Center ( -98.0000000, 19.5000000) >> >> Band 1 Block=256x256 Type=UInt16, ColorInterp=Gray >> >> NoData Value=0 >> >> Overviews: 3600x1800, 1800x900, 900x450, 450x225, 225x113 >> >> Warning 1: TIFFReadDirectory:volcanes.tif: Wrong "StripByteCounts" >> >> field, ignoring and calculating from imagelength >> >> >> >> >> >> If I try to create the terrain database this way I get only a line >> >> osgdem -d volcanes.tif -l 8 -v 1.0 -o volcanes.ive >> >> >> >> so I have to give approximate pixel size with xx and yy and it >> apparently >> >> works. >> >> osgdem --xx 33 --yy 33 -d volcanes.tif -l 8 -v 1.0 -o volcanes.ive >> >> >> >> Is there not enough information in the geotiff file? or this is a bug? >> >> >> >> Regards, >> >> >> >> -- A. >> >> _______________________________________________ >> >> osg-users mailing list >> >> [email protected] >> >> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > >> > >> > _______________________________________________ >> > osg-users mailing list >> > [email protected] >> > >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > >> > >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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