Umit, I didn't think that the --geocentric and --TERRAIN options were mutually exclusive. At any rate, I removed the --TERRAIN option and the problem still exists.
Thanks for the suggestion... -Shayne -----Original Message----- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Ümit Uzun Sent: Friday, December 12, 2008 12:02 PM To: OpenSceneGraph Users Subject: Re: [osg-users] discontinuity in texture in VPB... Hi Tueller, Do you want geocentric or terrain database? As I know you should use one option in the command line. --Terrain or --geocentric Try use only one option again. HTH Regards. 2008/12/12 Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC <shayne.tuel...@hill.af.mil> All, I finally have two small Geotiff tiles (1m resolution) that I've experimented with to examine this problem. I run them through VPB and they first get reprojected (via GDAL I presume) into temporary files. I then load the two temporary reprojected files into OpenEV for examination and they still appear to line up as they did before being reprojected. That would seem to suggest that the problem isn't with the reprojection step (or what GDAL is doing). Once VPB installs them into the database, they do NOT line up as I have shown in my previous email with the screen capture. This would suggest that VPB is doing something that is shifting them off so they don't align. I've attached the two GeoTiff tiles if anyone wants to reproduce this problem. Using VPB, I'm issuing the command: osgdem --TERRAIN --PagedLOD --geocentric -t hillsmall -l 8 -o hillsmall.ive The "hillsmall" directory contains the two tiles. Interestingly, when I remove the "--geocentric" flag from the above command, things look fine for a flat database and the tiles align (which isn't surprising). It's almost as if the spheroid between the tiles and what VPB is using are not matched. Any ideas on what's going on? -Shayne -----Original Message----- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of J.P. Delport Sent: Wednesday, December 10, 2008 11:39 PM To: OpenSceneGraph Users Subject: Re: [osg-users] discontinuity in texture in VPB... Hi, I'd also suggest what Christophe said. Do the projection of some tiles manually before VPB is run. I normally use something like: gdalwarp -t_srs "+proj=latlong +datum=WGS84" -r bilinear $name ../reprojected/$newname Then load the tiles into something like QGIS (http://www.qgis.org/) to see if they line up. jp christophe loustaunau wrote: > Hi Shayne, > > Maybe you could reproject your imagery to a geographic projection with > gdal (gdal_translate) and see if you have the same artifact. > You will know if it's a VPB or a gdal reprojection problem. > > On Wed, Dec 10, 2008 at 6:14 PM, Tueller, Shayne R Civ USAF AFMC 519 > SMXS/MXDEC <shayne.tuel...@hill.af.mil > <mailto:shayne.tuel...@hill.af.mil>> wrote: > > I've built a geocentric database using VBP 0.9.7. <http://0.9.7.> > The imagery is GeoTiff tiles that are NAIP 1 meter UTM and the > elevation is DTED level 1. The GeoTiffs appear to be reprojected by > VPB (I assume using GDAL internally) for the geocentric database > setting. Things appear to build just fine without error but when I > view the database in OSG, I see a nasty discontinuity across texture > tile boundaries. You can clearly see this in the airfield picture > that is attached. The landing strip does not line up across the tile > boundary. I've verified that the tiles themselves are correct across > boundaries before I fed them into VPB. The discontinuity appears > regardless of the LOD that is being paged in. > > > > My question is, is this an artifact that I must live with since the > original imagery is based in UTM and the reprojection that VPB does > (or GDAL) introduces inaccuracies when going to a geocentric > database? Is there something else I can do to eliminate these > discontinuities? > > > > Any input or ideas anyone can suggest to eliminate these > discontinuities in the database would be welcome. > > > > Thanks, > > -Shayne > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > <mailto:osg-users@lists.openscenegraph.org> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > -- > Christophe Loustaunau. > > > ------------------------------------------------------------------------ > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Ümit Uzun
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