I see the same strange areas when I'm viewing the tiles with Irfanview, so geoserver is excluded.
I re-created the first tile that gave me the problem (and only this tile) from the source files using gdal_retile and gdal_translate -projwin. The problem isn't there any more. So I guess it was only a random error ? I still need to recreate the higher tiles, if that works. Thanks for the tip on the option "TILED=YES". It comes from gdal_translate, I didn't think much when I started using gdal_retile. So I have no specific reason to use it and the output tiles of gdal_retile aren't tiled inside. Alain ----- Mail Original ----- De: "Christian Müller (via Nabble)" <ml-user+68004-9764...@n2.nabble.com> À: "acangi" <a...@ngi.be> Envoyé: Mercredi 19 Août 2009 14h34:41 GMT +01:00 Amsterdam / Berlin / Berne / Rome / Stockholm / Vienne Objet: Re: [Gdal-dev] Flashy colors in a pyramid Hi The thing I want to know is if you have the blue or green areas in the output files of gdal_retile.py or if you see them when looking at the images with geoserver. So, is at problem of gdal_retile.py or of geoserver loading the output from gdal_retile.py. Btw, you use the option -co "TILED=YES". Why ?. Each output tile of gdal_retile.py has again tiles in it ? acangi writes: > > Hi Christian, > > Thanks for your reply and thanks for writing gdal_retile. I use it a lot and > it works great. > > I'm not sure I understand you well. On the highest level of the pyramid (the > top) there's only one file. Gdal_retile already created the files needed for > the mosaic (shp, shx, dbf and prj). Would you like me to re-create them ? > > Or do you mean at the base of the pyramid ? > > Alain > > > Christian Müller wrote: >> >> Hi, Christian speaking, I wrote the gdal_retile.py utility. >> >> Could you try to run a gdal_merge.py on the highest pyramid level >> containing >> this strange area. What is the result.? I want to know if the problem is >> gdal_retile.py or geoserver. >> >> >> >> acangi writes: >> >>> >>> 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 >>> [hidden email] >>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >> >> >> _______________________________________________ >> gdal-dev mailing list >> [hidden email] >> http://lists.osgeo.org/mailman/listinfo/gdal-dev >> >> > > -- > View this message in context: > http://n2.nabble.com/Flashy-colors-in-a-pyramid-tp3470903p3471888.html > Sent from the GDAL - Dev mailing list archive at Nabble.com. > _______________________________________________ > gdal-dev mailing list > [hidden email] > http://lists.osgeo.org/mailman/listinfo/gdal-dev _______________________________________________ gdal-dev mailing list [hidden email] http://lists.osgeo.org/mailman/listinfo/gdal-dev View message @ http://n2.nabble.com/Flashy-colors-in-a-pyramid-tp3470903p3471969.html To unsubscribe from Re: Flashy colors in a pyramid, click here . -- View this message in context: http://n2.nabble.com/Flashy-colors-in-a-pyramid-tp3470903p3472194.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
