Andrew-
I anyway wanted to contact you on the xlink question.
Your approach as presented at the Boston TC
meeting I consider the missing link for WCS: we
consider coverages delivered as a manifest (XML)
and one or more encoded files, referenced from
the manifest. It seems like your approach allows
to mimic this in GML. Is that correct?
As we currently are seriously considering
adopting GML for the WCS 2.0 coverage model such
a facility is of high importance to us.
-Peter
PS: this might also resolve the dispute of this
thread: GML coverages can well reference a netCDF file then, can't they?
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:
<mailto:wcs-2.0.swg-bounces+andrew.woolf=stfc.ac.uk@xxxxxxxxxxxxxxxxxxxxxxxx>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>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>http://www.spotimage.com
Before printing, think about the environment
----------
De :
<mailto:wcs-2.0.swg-bounces+alexandre.robin=spotimage.fr@xxxxxxxxxxxxxxxxxxxxxxxx>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:
<mailto:wcs-2.0.swg-bounces+max.martinez=erdas.com@xxxxxxxxxxxxxxxxxxxxxxxx>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>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
<http://www.faculty.jacobs-university.de/pbaumann>www.faculty.jacobs-university.de/pbaumann
mail:
<mailto:p.baumann@xxxxxxxxxxxxxxxxxxxx>p.baumann@xxxxxxxxxxxxxxxxxxxx
tel: +49-421-200-3178, fax: +49-421-200-493178
- Executive Director, rasdaman GmbH Bremen (HRB 147737)
<http://www.rasdaman.com>www.rasdaman.com,
mail: <mailto:baumann@xxxxxxxxxxxx>baumann@xxxxxxxxxxxx
tel: 0800-rasdaman, fax: 0800-rasdafax, mobile: +49-173-5837882
"A brilliant idea is a job halfdone."
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