[OSGeo-Standards] What's GMLCOV and GMLCOV for JPEG2000?

Peter Baumann p.baumann at jacobs-university.de
Thu Jul 24 06:12:42 PDT 2014

Hi all,

GMLCOV is OGC's data model for coverages [1]; this is an interoperable, 
conformance-testable implementation model for the abstract (hence, 
non-interoperable) ISO 19123. It is good for n-D spatio-temporal regular & 
irregular grids, point clouds, and meshes.

While formally defined in GML, GMLCOV does not depend on GML encoding. As 
Mateusz has pointed out correctly, many encodings are possible, such as 
JPEG2000. This figure [2] explains encoding variants. GMLJP2 adds GML info to 
JPEG2000. As JPEG2000 can carry further information, this is used to add in more 
(sub) coverages and features around the central grid image. For example, 
annotations can be added into a GMLJP2 image this way.


[1] http://en.wikipedia.org/wiki/Coverage_data
[2] http://en.wikipedia.org/wiki/File:Coverage_encoding_variants.png

On 07/24/2014 02:39 PM, Stefan Keller wrote:
> Hi Mateusz
> Thanks a lot for the quick response.
> So put in other words:
> It's about a geospatial coverage format
> * under the hood of JPEG
> * with a OGC GEOCONV-alike metadata encoding
> * and a JPEG-alike regular raster/regular grid data encoding?
> --Stefan
> 2014-07-24 14:22 GMT+02:00 Mateusz Łoskot <mateusz at loskot.net>:
>> On 24 July 2014 13:41, Stefan Keller <sfkeller at gmail.com> wrote:
>>> * What is roughly GMLCOV and GMLCOV for JPEG2000?
>> GMLCOV is the overall of OGC GML Coverage encodings.
>> GMLCOV for JPEG2000 is a proposal to extend the GMLCOV
>> with yet another non-GML encoding format of a geospatial coverage,
>> that is, JPEG2000.
>> The idea is similar to GMLCOV extensions for GeoTIFF, NetCDF and other
>> encodings.
>> Best regards,
>> --
>> Mateusz  Łoskot, http://mateusz.loskot.net
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Dr. Peter Baumann
  - Professor of Computer Science, Jacobs University Bremen
    mail: p.baumann at jacobs-university.de
    tel: +49-421-200-3178, fax: +49-421-200-493178
  - Executive Director, rasdaman GmbH Bremen (HRB 26793)
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