All, When I make a 2-D Map from satellite imagery and let it generate the maximum number of LODs required to reach the max resolution, I always see black seams/stripes/borders of my images used during the OSGDEM process. Here is my normal approach: I start with a folder of imagery...as an example let's say I have 12 geocells (1deg lat/1 deg long each) of imagery. Using gdalwarp (from FWTools), I will reproject all the satellite imagery from Geographic Lat/Long to my output projection of choice (usually TM, UTM or LCC). I use cubic spline resampling and output GeoTIFFs. I used to think this is where my problem lay, but I can open up the reprojected imagery in a viewer (like Imagine or GlobalMapper) and I can clearly see that the black edges around the terrain stayed pure black (0,0,0) after the reprojection. I can also verify that there is overlap between the images (3 pixels in my current case). So then I run osgdem on my folder of reprojected GeoTIFs with a command like this: Osgdem -t Y:\Test_10m_Reprojected -o test_sat_2d.ive -l 99 Most of the time the black seam does not become apparent/visible until I zoom into the highest LOD using the osgviewer.
I am using osgdem from OSG1.2 on WinXP PC. HELP! David Riepl Visualization IG\DB Team > Training Systems & Services [EMAIL PROTECTED] 314.777.4741 _______________________________________________ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
