Hi, i have tried to generate a terrain (.ive) database using osgdem commandline options in order to buid a flat database where coordinates are in meters. After successfull generation i put that terrain in my osg application and really shocked! Before telling you what i saw as the output let me tell you my inputs. - i have four Dted-2 elevation file, - i have one GeoTiff image which is successfully mapped on dted files. - Dteds are starting (from 36N, 128E to 38N, 130E). So there are 4 1x1 degree cells [ Total size is 2x2]. - GeoTiff image also extends from 36N, 128E to 38N, 130E. So it covers [2x2] elevation file without no problem.
Dted and Image Coordinate Systems are: Geographic ( Latitude / Longitude ) Datum : WGS84 Unit : Arc degrees. after putting dteds and image in seperate folders ( MyDted, MyImage ) i executed the following vpb command to generate my flat database. - osgdem -t MyDted -d MyImage -l 8 -v 0.1 -o MyTerrain_Flat.ive after executig above line and loading Terrain_Flat.ive on my osg application it was really difficult to find where is MyTerrain_Flat.ive on my view. When i zoom in What i saw was a 2x2 meter flat database in osg size. !!!It was located on x = 128 , y = 36 on my view according to ( 0,0,0) of my scene!!! Real size of Dteds of Image was 178 km in Easting and 221 km in Northing.. i have checked size and everythings was ok with Dted and Image. Now the question is 1 - Is there a problem with vpb when creating flat database in meters? 2- Have i missed a command line option? 3- Why is the generated terrain covers 2x2 meters although it is 178 x 221 km in real size? 4- Why it is located in x = 128 , y = 36 ? Those were Lower Left Lat/Lon coordinates of dteds and image file? 4- Isn't it possible to generate real size flat terrains in meters in x,y,z using vpb? Any help is really appreciated... ... Thank you! Cheers, Atilla ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=39045#39045 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
