all-
in my earlier mail today:
Peter Baumann wrote:
...
PS: this might also resolve the dispute of this thread: GML coverages
can well reference a netCDF file then, can't they?
I seem to have used a misleading word. In Germany, "Disput" has a
distinct connotation of a scientific discussion; for severe divergence
and quarrels, arguments, etc. we use other words (such as "Streit"). In
the rapid exchange today I had mixed up both semantics.
So let me clarify that the intent was not in an offensive sense, but
definitely to characterize a technically oriented discussion.
Sorry if this has come across in a wrong flavor.
-Peter
Woolf, Andrew (STFC,RAL,ESC) wrote:
I’d say the same thing about GML – it’s already possible to use GML
to provide a canonical encoding linked to an underlying conceptual
model *AND xlink to netCDF for the actual content*.
Andrew
*From:*
wcs-2.0.swg-bounces+andrew.woolf=stfc.ac.uk@xxxxxxxxxxxxxxxxxxxxxxxx
[mailto:wcs-2.0.swg-bounces+andrew.woolf=stfc.ac.uk@xxxxxxxxxxxxxxxxxxxxxxxx]
*On Behalf Of *Robin, Alexandre
*Sent:* 20 August 2009 09:16
*To:* Max Martinez; Ben Domenico; Peter Baumann
*Cc:* Unidata Techies; Unidata GALEON; Carl Reed; wcs-2.0.swg
*Subject:* Re: [WCS-2.0.swg] CF-netCDF standards initiatives
FYI,
SWE Common can serve to send very efficiently packaged datasets
(binary, compressed binary) just like NetCDF does while providing
robust metadata describing the datasets.
These datasets can be N-D grid coverages, discrete coverages, or any
other kind of sensor observations or model results.
The point for us to build SWE Common rather than just reusing NetCDF
was to support efficient random access in huge datasets and real time
streaming data (which NetCDF is not designed for) with a single model.
Both cases are supported and I am pretty sure we can generate a SWE
Common encoded binary stream that is byte-to-byte compatible with the
data section of a NetCDF file.
Developing a module for the NetCDF API dealing with SWE Common would
be quite trivial thanks to the harmonization work we have already done.
Regards,
-------------------------------------------------
*Alexandre Robin*
Spot Image, Web and E-Business
Tel: +33 (0)5 62 19 43 62
Fax: +33 (0)5 62 19 43 43
http://www.spotimage.com
Before printing, think about the environment
------------------------------------------------------------------------
*De :* Robin, Alexandre
*Envoyé :* jeudi 20 août 2009 10:01
*À :* 'Max Martinez'; Ben Domenico; Peter Baumann
*Cc :* Unidata Techies; Unidata GALEON; wcs-2.0.swg; 'Carl Reed'
*Objet :* RE: [WCS-2.0.swg] CF-netCDF standards initiatives
Ben,
I hope we don’t have to define a NEW standard but rather work with
you to see how we can treat your use cases with SWE Common (which
already incorporates some NetCDF concepts and is VERY close to NcML).
I already looked at the issue and writing a converter (even the ‘on
the fly’ kind) between the two formats should be no problem at all.
Bringing legacy formats (be them pseudo-defacto standards of a
community) into OGC is NOT going to help interoperability across domains…
Regards,
-------------------------------------------------
*Alexandre Robin*
Spot Image, Web and E-Business
Tel: +33 (0)5 62 19 43 62
Fax: +33 (0)5 62 19 43 43
http://www.spotimage.com
Before printing, think about the environment
------------------------------------------------------------------------
*De :*
wcs-2.0.swg-bounces+alexandre.robin=spotimage.fr@xxxxxxxxxxxxxxxxxxxxxxxx
[mailto:wcs-2.0.swg-bounces+alexandre.robin=spotimage.fr@xxxxxxxxxxxxxxxxxxxxxxxx]
*De la part de* Max Martinez
*Envoyé :* jeudi 20 août 2009 03:19
*À :* Ben Domenico; Peter Baumann
*Cc :* Unidata Techies; Unidata GALEON; wcs-2.0.swg
*Objet :* Re: [WCS-2.0.swg] CF-netCDF standards initiatives
Ben,
What exactly is an “OGC binary encoding standard”? Is CF-netCDF
attempting to be the first of its kind or are there other examples?
Max
------------------------------------------------------------------------
*From:*
wcs-2.0.swg-bounces+max.martinez=erdas.com@xxxxxxxxxxxxxxxxxxxxxxxx
[mailto:wcs-2.0.swg-bounces+max.martinez=erdas.com@xxxxxxxxxxxxxxxxxxxxxxxx]
*On Behalf Of *Ben Domenico
*Sent:* Wednesday, August 19, 2009 1:19 PM
*To:* Peter Baumann
*Cc:* Unidata Techies; Unidata GALEON; wcs-2.0.swg
*Subject:* [WCS-2.0.swg] CF-netCDF standards initiatives
Hello,
Some confusion has resulted from the fact that we are pursuing two
parallel efforts at standardizing CF-netCDF within the OGC.
The first initiative began a few years ago. The goal is to establish
CF-netCDF as an extension standard for WCS encoding of data in binary
form. Stefano Nativi just sent out an email announcing the latest
revision of the proposed "discussion paper" on that topic. This will
be discussed and hopefully voted on at the September/October TC meeting.
At the same time, we have a new initiative to establish CF-netCDF as
a separate OGC binary encoding standard. This approach will
result in a binary encoding which can be used with different access
protocols, e.g., WFS or SOS as well as WCS. Of course, in the long
run, our objective is to tie the two approaches together, but we do
not want to impede progress on either right now by making them
formally interdependent. A very rough draft of the core standard for
CF-netCDF is on the GALEON wiki at:
http://sites.google.com/site/galeonteam/Home/cf-netcdf-candidate-standard
As you can see, the draft for the OGC core is based on the NASA Earth
Science Data System standard (NASA ESDS-RFC-011v1.00). We hope to
have this candidate standard in the proper OGC template form by the
September/October TC and will have an ad-hoc session at which we plan
to establish a SWG. Since there is already a large community of
practice, endorsement by other standards groups (NASA and NOAA in the
US), and solid reference implementations, we hope to move forward
quickly with this standard.
We would very much like to have as many liaisons as possible between
the WCS and CF-netCDF working groups to ensure that they are kept in
harmony.
-- Ben
--
Scanned by iCritical.
--
Dr. Peter Baumann
- Professor of Computer Science, Jacobs University Bremen
www.faculty.jacobs-university.de/pbaumann
mail: p.baumann@xxxxxxxxxxxxxxxxxxxx
tel: +49-421-200-3178, fax: +49-421-200-493178
- Executive Director, rasdaman GmbH Bremen (HRB 147737)
www.rasdaman.com, mail: baumann@xxxxxxxxxxxx
tel: 0800-rasdaman, fax: 0800-rasdafax, mobile: +49-173-5837882
"A brilliant idea is a job halfdone."
--
Dr. Peter Baumann
- Professor of Computer Science, Jacobs University Bremen
www.faculty.jacobs-university.de/pbaumann
mail: p.baumann@xxxxxxxxxxxxxxxxxxxx
tel: +49-421-200-3178, fax: +49-421-200-493178
- Executive Director, rasdaman GmbH Bremen (HRB 147737)
www.rasdaman.com, mail: baumann@xxxxxxxxxxxx
tel: 0800-rasdaman, fax: 0800-rasdafax, mobile: +49-173-5837882
"A brilliant idea is a job halfdone."