Selon "Zermeno, Robert J CIV NAVAIR, 472100D" <[email protected]>:
> GDAL Community, > > I noticed GDAL has a utility program gdaladdo which embeds new overviews to a > supplied file. Does gdal have a utility program that allows me to extract > overviews to a file? Yes, it is a debug utility, called dumpoverviews, that is not compiled by default. You will have to download GDAL sources, compile them, and then go to the "apps" directory and : make dumpoverviews (Linux/Unix) or nmake /f makefile.vc dumpoverviews.exe (Windows) The source http://trac.osgeo.org/gdal/browser/trunk/gdal/apps/dumpoverviews.cpp will answer all your questions. I'd note that JP2 is a bit special. The full resolution image and the overviews are mixed in the JP2 datastream. The choice of overviews levels exposed by GDAL is rather arbitrary. _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
