Hi Cedric, Yes, you can make your terrain with this method. There would not be any problem because I create http://img222.imageshack.us/my.php?image=tasimearthjb4.png database with using this way. But I suggest you to create smaller one and if there is not problem you can create bigger one with comfort.
May it be easy. Best Regards. Ümit Uzun 2008/9/1 Cedric Pinson <[EMAIL PROTECTED]> > Hi Ümit Uzun > If you tell me that the problem does not appear with those map, i will try > the big one in raw binary format. > > thank you for your help > > > Ümit Uzun wrote: > >> Hi Cedric, >> >> I use another elevation data which are grayscale images. To create a good >> height relief whole earth database; >> >> 1 - Open up the ftp://veftp.gsfc.nasa.gov/bluemarble/ and download >> land_shallow_topo_west.tif and land_shallow_topo_east.tif >> >> 2 - Open up the http://visibleearth.nasa.gov/view_detail.php?id=8391 and >> download srtm_ramp2.world.21600x10800.jpg (P.S. You can download >> srtm_ramp2.world.86400x43200.bin.gz.torrent or >> srtm_ramp2.world.5400x2700.jpg but I created my earth database with using >> srtm_ramp2.world.21600x10800.jpg) >> >> 3 - Use "gdal_translate srtm_ramp2.world.21600x10800.jpg >> topo_unreferenced.tif" command to convert jpg to tiff format. >> >> 4 - At this point created topo_unreferenced.tif image hasn't WGS84 >> reference meta-data. So we dig in these data with using gdal_vrt files. For >> topo_unrefereced.tif images our vrt file is like below; >> >> ------------------------------reference.vrt---------------------------- >> <VRTDataset rasterXSize="21600" rasterYSize="10800"> >> <SRS>WGS84</SRS> >> <GeoTransform>180,0.016666666666666666,0,90,0, >> 0.016666666666666666</ >> GeoTransform> >> <VRTRasterBand dataType="UInt16" band="1"> >> <ColorInterp>Gray</ColorInterp> >> <SimpleSource> >> <SourceFilename>topo_unrefereced.tif</SourceFilename> >> <SourceBand>1</SourceBand> >> <SrcRect xOff="0" yOff="0" xSize="21600" ySize="10800"/> >> <DstRect xOff="0" yOff="0" xSize="21600" ySize="10800"/> >> </SimpleSource> >> </VRTRasterBand> >> </VRTDataset> >> ------------------------------reference.vrt---------------------------- >> >> 5 - Copy and paste the reference.vrt xml data to the notepad and save on >> your disk. >> >> 6 - Use "gdal_translate referance.vrt topo_referenced.tif" command. This >> command create you topo_referenced.tif real whole earth elevation data. >> >> 7 - osgdem --bluemarble-east -t land_shallow_topo_east.tif >> --bluemarble-west -t land_shallow_topo_west.tif --geocentric -o >> earth/earth.ive -so build.source >> >> 8 - osgdem -s build.source -d topo_referenced.tif -v 750.0 -l 6 >> >> 9 - After build operation you should get well height relief whole earth >> database. >> >> If any problem you get while the operation, only ask me. >> >> Best Regards. >> >> Ümit Uzun >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> > > -- > +33 (0) 6 63 20 03 56 Cedric Pinson mailto:[EMAIL PROTECTED] > http://www.plopbyte.net > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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