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We brought KML into the OGC . . . And there are other organizations interested in bringing legacy spatial encodings into the OGC. There are sound business and policy reasons for doing so. Providing long term stability within a community - including interoperability - is one reason. Another is protection of legacy investments. And one needs to consider the scope of implementation and knowledge associated with legacy encodings such as NetCDF. Finally, one needs to consider policy statements, such NOAA this year mandating NetCDF as the intermediate file format for all STAR and OSDPD product systems. I would strongly encourage the group to schedule a discussion (teleconference or in Darmstadt) to determine the best go forward. Consider all aspects and requirements - cross domain interoperability is one requirement of many. Carl Reed, PhD CTO OGC ----- Original Message ----- From: Robin, Alexandre To: Max Martinez ; Ben Domenico ; Peter Baumann Cc: Unidata Techies ; Unidata GALEON ; wcs-2.0.swg ; Carl Reed Sent: Thursday, August 20, 2009 2:01 AM Subject: 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
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