NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.

To learn about what's going on, see About the Archive Site.

Re: Fwd: [GMLJP2] RE: GML, JPEG2K, and WCS

NOTE: The galeon mailing list is no longer active. The list archives are made available for historical reasons.

I'll admit to not closely following the JP2 work, but I've still got a question: Last I checked, JPEG compression was lossy. Has this changed with JPEG2000, and if not, how do we reconcile lossy compression with recapturing the pixel values/contents?
For instance, I have a particular interest in using WCS for sea surface temperatures, as one example, and content rich weather radar data as another. If we invoke a lossy compression scheme, I lose data. 

Am I concerned about a solved problem?
Also: in the examples, you cite basic surface met observations data. We already move that quite nicely via WFS, and I'm not sure that particular example has bearing. NOW: attempting to represent fine grid from a model where the output is the result of shading or contouring might be an example of a utilitarian implementation. Pedantically speaking, of course ;-) 

Thanks, Gerry

Ben Domenico wrote:

Hi,
Below are comments from Ron Lake and Sean Forde responding to questions I asked about possible relationships between the OGC GMLJP2 (GML JPEG2000) work they are involved in and the GALEON IE. It could provide another standards-based approach to delivering the kinds of datasets we are working with in GALEON.
Especially I call your attention to the suggestion that we find a venue at the Bonn OGC technical commitee meeting for further discussion. I suggest we spend a few minutes at tomorrow's GALEON telecon on this topic. 

-- Ben
  • 2005 messages navigation, sorted by:
    1. Thread
    2. Subject
    3. Author
    4. Date
    5. ↑ Table Of Contents
  • Search the galeon archives: