Hello list, I created a pyramid of aerial photos using gdal_retile.py and now see there are strange zones in the pyramid. I'm trying to understand why I got this strange results and how I can fix it (Bombing the area to make sure it looks like what I have ?). Description : 1. The command I used was gdal_retile.py -targetDir pyramid/ -levels 12 -pyramidOnly -v -s_srs /path/to/prjs/3812.prj -ps 10000 10000 -r bilinear -co "TILED=YES" -co "COMPRESS=LZW" -co "INTERLEAVE=PIXEL" -tileIndex orthocol -tileIndexField location /path/to/source/files/*.tif & 2. In the source files, I see nothing special. The tiles in this area look like the other ones. 3. On the first (generated) level of the pyramid, I see a small area (alias SMALL_SQUARE : 256m x 256m) in blue : http://n2.nabble.com/file/n3470903/BlueSquare.jpg 4. On the next levels of the pyramid, a black rectangle 512m x 256m is now visible where SMALL_SQUARE was : http://n2.nabble.com/file/n3470903/BlackRect.jpg and the area corresponding to the first level tile containing SMALL_SQUARE (alias BIG_SQUARE : 10000m x 10000m) is in green : http://n2.nabble.com/file/n3470903/GreenSquare.jpg 5. I view the pyramid in geoserver, the tiles look like they are on disk, except at the first level, geoserver doesn't show me the full SMALL_SQUARE, only parts of it. In geoserver logs, I find nothing very interesting, it all looks the same whether or not I'm looking at BIG_SQUARE. 6. If I set OutputTransparentColor to #000000 (the background color), BIG_SQUARE is now invisible (in geoserver)
So, my questions are : Why did it happen ? I suppose it's just a random error... How can I fix it ? Is there any way other than rebuilding the whole pyramid ? Any idea is welcome, Alain -- View this message in context: http://n2.nabble.com/Flashy-colors-in-a-pyramid-tp3470903p3470903.html Sent from the GDAL - Dev mailing list archive at Nabble.com. _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
