Thanks. If I build gdal with kadaku will that support it?
Best jim On 1/25/10 11:28 PM, "Frank Warmerdam" <warmer...@pobox.com> wrote: > James, > > I have reviewed nitfdataset.cpp and jpeg2000dataset.cpp > (the JasPer driver) and I believe they are now compatible. > That is, nitf now uses the /vsisubfile/ mechanism to > operate on the jpeg2000 data stream and I see the > JasPer driver now uses the VSI*L API needed to support > the /vsisubfile/ mechanism. > > However, most NITF files I have worked with that > had jpeg2000 compression had single large > compressed images, not many small tiles. > The JasPer library does *not* provide an effective > mechanism to read subareas so for a large image > it tends to use as much as 10 times as much memory > as would be needed to hold the decoded image. > This makes it impractical for many geospatial > applications. > > So I am still dubious about using it. > > Best regards, > > On Tue, Jan 26, 2010 at 9:12 AM, jim hopper <james.e.hop...@saic.com> wrote: >> I read the item about lack of support for the J2K_SUBFILE mechanism using >> jasper, and that it requires one of the commercial jpeg2000 drivers. Is >> that still the case, or Is there a way to read jpeg2k nitfs with open source >> jpeg2k libraries? >> >> Best jim >> >> _______________________________________________ >> 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
