So, using -p "raster" creates far worse distortion in the KML. I'm back to not using it. I get distortion only at the highest zoom levels that way.
2009/4/1 Klokan Petr Přidal <[email protected]> > Mano, > > > Thanks for the pointer. So it looks like, right now, there's a bug in > > gdal2tiles, according to Jesse? Any news on when that might be fixed? > > Just use this gdal2tiles.py: > http://maptiler.googlecode.com/svn/trunk/maptiler/gdal2tiles.py > > The issue he is referring is fixed in MapTiler SVN: > http://code.google.com/p/maptiler/issues/detail?id=9 > Commited in maptiler SVN in r17 on Mar 20, 2009. > > I am proposing to fix all known bugs during this summer as part of > Google Summer of Code project, and also implement support for OGC WMTS > standard, publish a stable version of MapTiler > (http://www.maptiler.org/) and synchronize the code with GDAL SVN. > > Klokan > > > > > Mano > > > > 2009/3/31 Klokan Petr Přidal <[email protected]>: > >> Mano, > >> > >> If you would like to have both Google Maps and Google Earth > >> presentation for a global map then you must generate two tile sets, > >> because Google Maps supports only Mercator tiles (EPSG:900913) and > >> Google Earth only geodetic (EPSG:4326). > >> > >> GDAL2Tiles has as a default tile profile 'mercator', it means that it > >> will warp your input into Spherical Mercator internally. > >> To create tiles and KML for Google Earth for your EPSG:4326 input data > >> you should use -p "raster". > >> > >> From the "gdal2tiles --help": > >> > >> -k, --force-kml Generate KML for Google Earth - default for > 'geodetic' > >> profile and 'raster' in EPSG:4326. For a dataset > with > >> different projection use with caution! > >> > >> Detailed description of recommended step by step usage of gdal2tiles > >> for global maps was posted by Jesse Varner > >> from CIRES & NOAA/NGDC, who used gdal2tiles for official presentation > >> of Global magnetic anomaly map EMAG2 (for Google Maps/Earth) at: > >> http://ngdc.noaa.gov/geomag/data/Google_Maps/EMAG2/index.html > >> > >> His post is here: > >> http://groups.google.com/group/maptiler/msg/fe105e27a62711e4 > >> > >> Best regards, > >> > >> Klokan > >> > >> On Tue, Mar 31, 2009 at 6:37 PM, Mano Marks <[email protected]> wrote: > >>> I'm getting started with gdal2tiles, and I'm getting strange results. > >>> > >>> I downloaded a blue marble jpg from NASA: > >>> http://www.nasa.gov/vision/earth/features/blue_marble.html > >>> > >>> And I ran the following command lines: > >>> > >>> gdal_translate -of VRT -a_srs EPSG:4326 -gcp 0 0 -180 90 -gcp 21600 0 > >>> 180 90 -gcp 21600 10800 180 -90 world_200401.jpg bluemarble1.vrt > >>> > >>> gdalwarp -of VRT -t_srs EPSG:4326 bluemarble1.vrt bluemarble2.vrt > >>> > >>> gdal2tiles -k bluemarble2.vrt > >>> > >>> Of course, the last step took awhile. > >>> > >>> The Google Maps and OpenLayers output was fine. However, the KML had > >>> some odd results. When loaded directly, it looked fine, but when I > >>> zoomed out, it appeared that what was the equivalent of zoom 0 and 1 > >>> the images retain a Mercator projection. Is this a known issue, or did > >>> I do something wrong? > >>> > >>> -- > >>> Mano Marks > >>> Geo Developer Advocate > >>> Google, Inc. > >>> [email protected] > >>> http://twitter.com/ManoMarks > >>> _______________________________________________ > >>> gdal-dev mailing list > >>> [email protected] > >>> http://lists.osgeo.org/mailman/listinfo/gdal-dev > >>> > >> > >> > >> > >> -- > >> http://blog.klokan.cz/ > >> http://www.maptiler.org/ > >> http://www.oldmapsonline.org/ > >> > > > > > > > > -- > > Mano Marks > > Geo Developer Advocate > > Google, Inc. > > [email protected] > > http://twitter.com/ManoMarks > > > > > > -- > http://blog.klokan.cz/ > http://www.maptiler.org/ > http://www.oldmapsonline.org/ > -- Mano Marks Geo Developer Advocate http://twitter.com/ManoMarks Join me for Google I/O, Google's biggest Developer Conference, in San Francisco, May 27th and 28th, 2009 http://code.google.com/events/io/
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