On Mon, Feb 25, 2008 at 04:31:34PM -0800, Michael P. Gerlek wrote: > Yup: Kakadu is not Open Source, as per the OSI definition of the term. > The only FOSS package I know of is OpenJpeg2000 (or something like > that); unfortunately, however, it is not suitable for geo-sized imagery > last time I looked.
Yep. > (LZW tiffs are a reasonable option, as they are lossless and the LZW > patent issues have faded into the sunset.) The level of compression from LZW is poor by comparison, on aerial imagery: a test dataset compressed from 169MB to 83MB, and time to serve up a small portion was approximately the same as with JPG (6.1s jpg, 6.5s lzw, .5s uncompressed), but the JPG was compressed to 13MB, making it worth the cost; lzw doesn't pay for itself in the same way. (See numbers on http://wiki.openaerialmap.org/Serving_Data) Regards, -- Christopher Schmidt Web Developer _______________________________________________ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss