I'm talking about 10 to 100 GigaBytes datasets, with which it doesn't seem reasonnable to generate a single merged file !
Couldn't gdal2tiles parse a whole directory ? Thanks, Guillaume Klokan Petr Přidal a écrit : > Hi Guillaume, > > Thank you for positive feedback ;-) > >> 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. > > I don't think you can use gdaltindex with other gdal tools (like > gdal_transform) either. > gdaltindex is used by UNM MapServer but not by other GDAL tools, as I know. > > You would need to use VRT for combining several rasters into one... > Use gdal_vrtmerge.py, it has similar syntax like gdaltindex. It is in > the source under /swig/python/samples/. > Result can be passed then to gdal2tiles and it should run well I hope. > > Is there any plan to merge gdal_vrtmerge into "gdal_merge -of VRT"? > > Best regards > > Klokan > >> 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 _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
