On Tue, Aug 10, 2010 at 7:16 AM, Martin Raspaud <[email protected]> wrote: > Hmmm, that sounds like a sufficient solution indeed, very good idea, thanks. > > Is there any scale/slope and offset/intercept tags defined in geotiff ?
Martin, GDAL supports saving this style of metadata in a private tag as defined at: http://www.awaresystems.be/imaging/tiff/tifftags/gdal_metadata.html To do so with the GDAL API use the SetOffset and SetScale methods on the GDALRasterBand: http://www.gdal.org/classGDALRasterBand.html#44e23beb3418c44a89d25ea708207fe1 I should note that in theory the TIFF specification allows a mix of sample types, but in practice this is not done in the real world, and libtiff does not support it. GDAL *does* support reading mixed band types from a variety of file formats, but not TIFF. As noted, AddBand() can be used in a few format cases to create mixed band types though this is rarely done. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, [email protected] light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
