That's an awesome job actually Klokan ! Thanks for these enhancements. Just a question after a quick look at the doc : can the input file be a raster catalog (the gdaltindex thing) ? Raster data needing to be tiled fur web publication are sometimes already tiled in several pieces because of their size.
Best regards, Guillaume Klokan Petr Přidal a écrit : > Hello everybody, > > what was done recently on GDAL2Tiles project: > > New cool example of the map generated by GDAL2Tiles: > ---------------------------------------------------------------------------------- > I processed freely available USGS DRG map of Grand Canyon by > GDAL2Tiles. It is a nice example of what GDAL2Tiles can generate: > > http://www.maptiler.org/example-usgs-drg-grand-canyon-gtiff/ > http://www.maptiler.org/example-usgs-drg-grand-canyon-gtiff/usgs-drg-grand-canyon.kml > > Source Code: > -------------------- > - Fully functional source code for generating Google Maps tiles is in > my GDAL SVN sandbox (http://svn.osgeo.org/gdal/sandbox/klokan/). > The code was refactored a lot and it is almost prepared for merging to > stable svn trunk gdal2tiles.py, but some coding is still needed. I am > going to work on it during the next week. > > - I split the code into three files: 'gdal2tiles.py' (the main command > line utility), then 'globalmaptiles.py' (classes for global > mercator/geodetic tile bounds calculation, runs as command line > utility too), and supporting module 'templates.py' with sample HTML > viewers and base for generated XML files. > > - Implementation of several resampling algorithms for controlling the > quality of tile rendering. Default is 'average' used in the GDAL's > overview functionality. Complete list is: > 'average','near','bilinear','cubic','cubicspline','lanczos','antialias'. > The last one is high quality Lanczos based antialiasing algorithm, but > you will need Python Image Library for that. > Quality of the tile rendering is excellent I think. If you need it, > the simple and fast 'near' it is still available. > > - GDAL2Tiles generates the sample Google Maps Based viewer, OpenLayers > based Overlay viewer and KML files for Google Earth. > > - The utility automatically warp the raster to Google Maps projection > (EPSG:900913) by AutoCreateWarpedVRT(). > > - For raster files with palette (USGS DRG, NOAA BSB, ...) a separate > VRT with "rasterize rgba" (GDAL 1.6dev) is recommended (later I would > like to automate this step). > > The code is NOT YET READY for production use (now supports only RGBA - > 4 bands - source files for example), so I recommend you to wait for > merged version which will appear in the GDAL trunk. I will send a note > when I will finish the merging. > > Documetation & MapTiler.org > ------------------------------------------ > > - I decided to create a special website for distributing binary > installer and user-friendly GUI for GDAL2Tiles. I plan to develop > wxWidget based GUI a la step by step wizard. The user-friendly project > has name MapTiler, http://www.MapTiler.org/. Right now this web is > used only for documentation on for raster files for templates, which I > did not want to distribute with utility. > > I received great feedback from several users and realized that > GDAL2Tiles utility is expected by community. That pushed me to crete > this new project and change the name to MapTiler, which is more > straightforward and fits to the utility probably better, especially > for users who are not familiar with GDAL tools yet. > GDAL2Tiles will be maintained as GDAL command line utility. MapTiler > will implement just GUI and binary distribution. > > It would be great to have blessing of OSGEO for this project, I would > prefer to not make separate SVN repository for such small project, > better to keep it as part of GDAL. Would it be possible? Otherwise I > will create Google Code project. > > - I studied the OpenGIS proposal for WMTS standard, which is related > to TMS and I plan to send some comments to that standard. Is there > still free OSGEO slot for OpenGIS membership? > > - I created a website about Spherical Mercator and Google Maps > Projection and Coordinate system, for anybody who is interested to see > the math behind tiles: > http://www.maptiler.org/google-maps-coordinate-system-projection-epsg-900913-3785/ > > Question to community: > ---------------------------------- > > - Would it be possible to keep more files separately even in the main > GDAL tree or the utility really have to be merged to one file? > > - Is there anybody in the OpenLayers community who whould like to have > a look at the Opacity Control for OL? I prepared the bitmaps. Is there > any need on the OpenLayers templates? Now I am using /dev/ tree of > OpenLayers as Virtual Earth support is broken in the stable tree > (Safari for example). > > - Does anybody know how to correctly set the KML SuperOverlay > maxlodpixels and fadeextents so transparency and opacity runs well and > tiles are not disappearing in Google Earth? > > - Is anybody interested to help me with developing MapTiler (for > example compilation of latest GDAL with all modules, preparing of > Windows installer, help with wxPython...) > KyngChaos (thank you!) already had a look at binaries for MacOSX, but > we did not moved far yet as I need some functionality from 1.6dev. > > Thanks belong to everybody who gave me excellent advices on #gdal IRC, > especially to 'FrankW' and 'even'. > > BTW I am looking for an interesting job or paid projects... any offers? ;-) > > Is there anybody who would like to support further development of > MapTiler/GDAL2Tiles? There is plenty of features on todo list (merging > of produced tiles with existing tile tree, support for MapCruncher > tiles, Zoomify tiles, speed improvement - rewrite to C++ to allow > better usage of threads on multi-core processors, driver for remote > online TMS tiles for GDAL/MapServer to allow WMS from statically > published tiles, etc..). > > Best regards... > > Klokan Petr Pridal > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev > _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
