Re: [osg-users] osgDEM usage...
On Mon, Jun 2, 2008 at 11:14 PM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC [EMAIL PROTECTED] wrote: Robert (or anyone else), Can you enlighten me on the --TERRAIN, --LOD, and --PagedLOD options in osgdem? What are the benefits or drawbacks for using these? Which is the best combination to use for performance, quality, etc.? --terrain tells the build to use osgTerain::TerrainTile for terrain rather than using osg::Geometry. Have a search through the last few months archives on this topic, I've written plenty. --LOD vs --PagedLOD, weill this is just whether it builds a single database containing osg::LOD, or a paged database of many separate tiles using osg::PagedLOD. Just use the default which is --PagedLOD as this is really what VPB is about, the --LOD is really just there for testing purposes. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgDEM usage...
Robert, The files were originally PNG files that I converted per the instructions on the wiki to the .tif format. Whether or not that makes them GeoTiffs I don't know. How can I convert the files to GeoTiffs? -Shayne -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Osfield Sent: Friday, May 30, 2008 2:14 AM To: OpenSceneGraph Users Subject: Re: [osg-users] osgDEM usage... Hi Shayne, The wiki instructions was written in the very early days of the development of osgdem, and is awaiting a rewrite. Today I wouldn't recommend using --xx definition of the coordinate system, you are better off using geospatial imagery/dems. Are you files GeoTiff's? If so then dispense with the --xx command lines and just use: osgdem -t n39_texture.tif -d n39_height_.tif -l 4 -o myterrain/myterrain.ive The coordinates will sourced entirely from the .tif files, there will also be no need to tangle with the -v vertical scaling command line parameter. The VPB version of osgdem also will created nested directories for you hence the myterrain/ directory above. Also temporarily archive support has been removed. Robert. On Thu, May 29, 2008 at 11:46 PM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC [EMAIL PROTECTED] wrote: All, I've made an attempt in generating a database using my own height field and texture per the instructions located at http://www.openscenegraph.org/projects/osg/wiki/Support/UserGuides/osgdem. So far, I have not had any luck in getting the height field to display correctly. The texture is present just fine but the terrain is either completely flat or is uncorrelated with the texture. This is the command I'm issuing to generate the terrain. osgdem --xx 90 --yy 90 -t n39_texture.tif --xx 90 --yy 90 -d n39_height_.tif -l 4 -v 0.1 -o myterrain.ive -a myterrain.osga The height field tif file comes from a 1 degree by 1 degree of DTED that is 3 arc second level 1, hence the reason for my spacing of 90 meters. If I increase the -v option scaling factor from 0.1 to 50, the terrain height shows up but it is totally uncorrelated with the texture. If anyone has any input on what I'm doing wrong or missing, it would be most appreciated if you could point it out. -Shayne ___ 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 smime.p7s Description: S/MIME cryptographic signature ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgDEM usage...
Hi Shayne, On Mon, Jun 2, 2008 at 5:20 PM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC [EMAIL PROTECTED] wrote: The files were originally PNG files that I converted per the instructions on the wiki to the .tif format. Whether or not that makes them GeoTiffs I don't know. How can I convert the files to GeoTiffs? If you want to do any geospatial work then you really need to familiarise yourself with tools like gdal, they have plenty of docs an links on their project website. VirtualPlanetBuilder uses GDAL internally, so what you learn about gdal also will help you understand about what VPB can handle. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgDEM usage...
Hi Shayne; I think You should use image which has a georeferenced data. So if you download images from osgdem wiki instroductions, it is normally getting wrong results. I will fix the osgdem wiki page in a few days. The instructions belongs for previous version of osgdem. If you want to create terrain database with hight relief, first of all you should an image which has a georeferenced data ( for example you can download geospatial images from http://seamless.usgs.gov/ and dem files from http://geoengine.nga.mil/geospatial/SW_TOOLS/NIMAMUSE/webinter/rast_roam.html ) or you have to learn using gdal ( http://www.gdal.org/ ), especially gdal_vrt ( http://www.gdal.org/gdal_vrttut.html ) to make add georeference data to any image. For example you downloaded x.tif and its releated y.dem data from given web pages. Then you can use this command; osgdem -t x.tif -d y.dem -v 5.0 -so builde.source -o database/sample_terrain.ive osgdem -s build.source -l 4 Then you should have an terrain with height relief. This can be a bit complex but you should search about osgdem from mail-list ( http://dir.gmane.org/gmane.comp.graphics.openscenegraph.user/ ) and always try to use georeferenced images. Good Luck; ÜMİT UZUN Date: Mon, 2 Jun 2008 19:54:25 +0100 From: [EMAIL PROTECTED] To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] osgDEM usage... Hi Shayne, On Mon, Jun 2, 2008 at 5:20 PM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC wrote: The files were originally PNG files that I converted per the instructions on the wiki to the .tif format. Whether or not that makes them GeoTiffs I don't know. How can I convert the files to GeoTiffs? If you want to do any geospatial work then you really need to familiarise yourself with tools like gdal, they have plenty of docs an links on their project website. VirtualPlanetBuilder uses GDAL internally, so what you learn about gdal also will help you understand about what VPB can handle. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _ Windows Live Spaces – hayatınız, Alanınız. Daha fazlasını öğrenmek için buraya tıklayın. http://get.live.com/spaces/overview ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgDEM usage...
Thanks to all who have replied to my inquiries thus far regarding osgdem usage. Your input is much appreciated. I will take what's been suggested and make some more progress. I'm sure I'll have more questions... Regards, -Shayne -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ümit uzun Sent: Monday, June 02, 2008 2:18 PM To: OpenSceneGraph Users Subject: Re: [osg-users] osgDEM usage... Hi Shayne; I think You should use image which has a georeferenced data. So if you download images from osgdem wiki instroductions, it is normally getting wrong results. I will fix the osgdem wiki page in a few days. The instructions belongs for previous version of osgdem. If you want to create terrain database with hight relief, first of all you should an image which has a georeferenced data ( for example you can download geospatial images from http://seamless.usgs.gov/ and dem files from http://geoengine.nga.mil/geospatial/SW_TOOLS/NIMAMUSE/webinter/rast_roam.htm l ) or you have to learn using gdal ( http://www.gdal.org/ ), especially gdal_vrt ( http://www.gdal.org/gdal_vrttut.html ) to make add georeference data to any image. For example you downloaded x.tif and its releated y.dem data from given web pages. Then you can use this command; osgdem -t x.tif -d y.dem -v 5.0 -so builde.source -o database/sample_terrain.ive osgdem -s build.source -l 4 Then you should have an terrain with height relief. This can be a bit complex but you should search about osgdem from mail-list ( http://dir.gmane.org/gmane.comp.graphics.openscenegraph.user/ ) and always try to use georeferenced images. Good Luck; ÜMİT UZUN Date: Mon, 2 Jun 2008 19:54:25 +0100 From: [EMAIL PROTECTED] To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] osgDEM usage... Hi Shayne, On Mon, Jun 2, 2008 at 5:20 PM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC wrote: The files were originally PNG files that I converted per the instructions on the wiki to the .tif format. Whether or not that makes them GeoTiffs I don't know. How can I convert the files to GeoTiffs? If you want to do any geospatial work then you really need to familiarise yourself with tools like gdal, they have plenty of docs an links on their project website. VirtualPlanetBuilder uses GDAL internally, so what you learn about gdal also will help you understand about what VPB can handle. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _ Windows Live Spaces - hayatınız, Alanınız. Daha fazlasını öğrenmek için buraya tıklayın. http://get.live.com/spaces/overview ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org smime.p7s Description: S/MIME cryptographic signature ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgDEM usage...
Robert (or anyone else), Can you enlighten me on the --TERRAIN, --LOD, and --PagedLOD options in osgdem? What are the benefits or drawbacks for using these? Which is the best combination to use for performance, quality, etc.? Thanks, -Shayne -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Osfield Sent: Monday, June 02, 2008 12:54 PM To: OpenSceneGraph Users Subject: Re: [osg-users] osgDEM usage... Hi Shayne, On Mon, Jun 2, 2008 at 5:20 PM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC [EMAIL PROTECTED] wrote: The files were originally PNG files that I converted per the instructions on the wiki to the .tif format. Whether or not that makes them GeoTiffs I don't know. How can I convert the files to GeoTiffs? If you want to do any geospatial work then you really need to familiarise yourself with tools like gdal, they have plenty of docs an links on their project website. VirtualPlanetBuilder uses GDAL internally, so what you learn about gdal also will help you understand about what VPB can handle. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org smime.p7s Description: S/MIME cryptographic signature ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgDEM usage...
Shayne, I got my data working by using gimp to flip the y axis on my image. -- Eric ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osgDEM usage...
All, I've made an attempt in generating a database using my own height field and texture per the instructions located at http://www.openscenegraph.org/projects/osg/wiki/Support/UserGuides/osgdem. So far, I have not had any luck in getting the height field to display correctly. The texture is present just fine but the terrain is either completely flat or is uncorrelated with the texture. This is the command I'm issuing to generate the terrain. osgdem --xx 90 --yy 90 -t n39_texture.tif --xx 90 --yy 90 -d n39_height_.tif -l 4 -v 0.1 -o myterrain.ive -a myterrain.osga The height field tif file comes from a 1 degree by 1 degree of DTED that is 3 arc second level 1, hence the reason for my spacing of 90 meters. If I increase the -v option scaling factor from 0.1 to 50, the terrain height shows up but it is totally uncorrelated with the texture. If anyone has any input on what I'm doing wrong or missing, it would be most appreciated if you could point it out. -Shayne smime.p7s Description: S/MIME cryptographic signature ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
