You have lots of ressources here: * http://gdal.org * http://trac.osgeo.org/gdal
To answer more directly your questions : * Yes, R,G,B channels are considered as bands in GDAL model. * You can read several band at a times with the GDALDataset::RasterIO() call. See http://gdal.org/classGDALDataset.html#e077c53268d2272eebed10b891a05743 Le Wednesday 21 April 2010 23:39:07 jcurru, vous avez écrit : > Hi. > I'm new to GDAL, but supposed to have some experience in C++. > I'm trying to use GDAL in my project because CxImage, the image library I > was using so far, is not able to deal with big images. > After several days fighting against my compiler I could finally build > gdal.lib (I'm using Builder C++, supposed not to be supported by GDAL). > Now I'd like to start working with GDAL, but I can't find a start point. My > first aim is to build a pyramid of tiles in a special format (no GeoTiff or > ECW tiles, for example, but one I have designed to work with OpenGL). I'd > like to be able to load arbitrary tiles from a tiff image (and then convert > them to my format), but the only think I have found is that I have to work > with "bands". Well, I guess a band is something like a channel (R, G, B, > Alpha...) but what I need are RGB tiles. > As you can see, I'm slightly lost. > So, could anybody tell me the way to learn about GDAL? I've been googling > around but I can't find anything. > Thanks a lot for your help! _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
