VPB will build the database using the CS of the source elevation/imagery. If the source is UTM, the database will be in that CS. If it uses lat/lon, it will be in that CS (both are flat earth databases).
The placement of objects in the database will need to be in the CS the database uses or was built with. The "geocentric" flag will create a "round" earth type database where the origin is the center of the earth. You're probably getting the error because you need to re-project your data from UTM to WGS84 geodetic/georeferenced CS. Do a "gdalinfo" on your source data to see what it is... -Shayne -----Original Message----- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Ethan Fahy Sent: Monday, September 12, 2011 11:19 AM To: osg-users@lists.openscenegraph.org Subject: [osg-users] [vpb] Placing an object on a UTM file generated withosgdem I have looked through all of the forum posts related to this issue and they have implicitly but not explicitly told me how to solve my problem, but being such a newbie I think I need some explicit help :-* I am starting with two geoTiff files, one dem and one terrain. I convert to ive using the following command line structure: osgdem -t terrain.GEOTIFF -d dem.GEOTIFF -l 1 -o terrain.ive I am able to load terrain.ive into my osg application and view it just fine. I then want to be able to add objects (e.g. tree osg files) onto the terrain. At this point I should mention that the geotiff files are in UTM WGS84 format. I have been trying to add a tree onto the terrain with the following osg code: Code: /* Load Scene Components from Files */ osg::ref_ptr<osg::Node> terrain = osgDB::readNodeFile("data\\terrain\\terrain.ive"); osg::ref_ptr<osg::Node> tree = osgDB::readNodeFile("data\\tree\\Tree1.osg"); /* Group Scene Components */ /*Tree Transform*/ osg::ref_ptr<osg::PositionAttitudeTransform> treeXform = new osg::PositionAttitudeTransform; osg::Vec3 treePosit(?,?,?); treeXform->setPosition( treePosit ); osg::Vec3 treeScale(1,1,1); treeXform->setScale(treeScale); /*Tree Rotation*/ osg::ref_ptr<osg::MatrixTransform> treeRotation = new osg::MatrixTransform; const double angle = osg::DegreesToRadians(0.0); const Vec3d axis(1, 0, 0); treeRotation->setMatrix(Matrix::rotate(angle, axis)); osg::ref_ptr<osg::Group> root = new osg::Group(); root->addChild(terrain);//add terrain to root root->addChild(treeXform);//add translation to root treeXform->addChild(treeRotation);//add rotation to translation treeRotation->addChild(tree);//add tree to rotation My question is whether this osg command / osg code is on track and I simply need to figure out appropriate values for my treePosit variable or whether I need to take a fundamentally different approach. I have read about attaching objects to geotiffs that were converted using the --geocentric flag, but if I add the --geocentric flag I get the following error: ERROR 1: No PROJ.4 translation for source SRS, coordinate transformation initialization has failed. I have also seen the --TERRAIN flag for osgdem, but I definitely don't know if that's what I need. I have also looked into using osgEarth, which from what I've read might take care of more of this stuff automatically, but I'd rather figure this out using VPB/osgdem since I think I'm really close to a solution. Thanks in advance for any help! ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=42652#42652 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
