Hi Agustin, GDAL uses nearest neighbour technique to get texels from source imagery, it doesn't smooth them, or doing any averaging when down sampling data. This does lead to some loses in imagery quality, including single pixel shifts.
With GoeTIff files you can build overviews which help reduce this artifacts. Robert. On 3/26/07, Agustín Trujillo <[EMAIL PROTECTED]> wrote:
Hi guys: I'm using gdal-132 and osgdem (OSG1.2) to build a 2x2 texture mosaic, using: osgdem --xx 1 --yy 1 -d height_2k.tif --xt 0 --yt 0 -xx 1 -yy 1 -t tex00_1k.tif --xt 0 --yt 1024 -xx 1 -yy 1 -t tex01_1k.tif --xt 1024 --yt 0 -xx 1 -yy 1 -t tex10_1k.tif --xt 1024 --yt 1024 -xx 1 -yy 1 -t tex11_1k.tif -l 2 -v 0.001 -o test.ive -o test.osga When I visualize the scene, the problem is that there exists a texture shifting (curiously, only in x-direction) when changing from a LOD level to another. I have read a similar problem in a post from Gert van Maren last December, but I have not read any solution. Any idea? Thanks in advance. _______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
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