Re: [galeon] [WCS-2.0.swg] CF-netCDF standards initiatives

  • Subject: Re: [galeon] [WCS-2.0.swg] CF-netCDF standards initiatives
  • From: John Caron <caron@xxxxxxxxxxxxxxxx>
  • Date: Thu, 20 Aug 2009 09:41:32 -0600
Hi Alexandre:

This is the first Ive heard of SWE Common (which doesnt mean much since I havent followed the SWE efforts closely). Is it possible to get more information about the data model and encoding? Unidata is also working on a streaming format, and it would be interesting to see how the two efforts compare. Also how SWE Common relates/compares to NcML.

Thanks,

John Caron
Unidata



*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

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*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