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Ben,Under #4 below, what's being done, to your knowledge, to facilitate extension of CF-netCDF to support, in some standardized manner or convention, unstructured/irregular grids? This continues to be an issue for the Coastal community and is something I'd love to see addressed.
Thanks, Gerry Ben Domenico wrote:
Hi all, Recent discussions on the wcsplus mailing list have included possible objectives for the initiative. I'd like to make it clear that my view is that an overarching goal is for the results of the work to feed into the WCS Standards Working Group and to have that input based on experimentation with actual implementations. The adopted approach is to start with WCS 1.0 because there are already a substantial number of working implementation (e.g. the GALEON implementations) and because it appears that the next WCS spec will differ significantly from WCS 1.1. Hopefully we can act quickly enough that the results of the work can inform the WCS 1.2 specification, which seems to be moving in the direction of a "base" )or "core") plus "extensions" definition of WCS. In various discussions, the following list of specific objectives for WCS 1.0 Plus have been put forth. In keeping with the WCS 1.0 Plus philosophy, these should be minimal changes that are relatively easy to implement and test. 1) "Clean up" the WCS 1.0 specification making it fully based on the ISO 19123 coverage specification 2) Sort out some of the inconsistencies between the KVP and XML schema documents. 3) Extend the WCS 1.0 specification adding the following features: a) change the range set model in order to support multi- parameters -- in agreement with the ISO 19123 model. b) clean up and extend the CRS encoding --in agreement with the ISO 19123 model (including adoption of 07-112 proposal for 19123 irregular grids in GML). c) minimally 're-interpret' 1.0 AxisDescription for heterogeneous coverages. d) add negative Z dimensions 4) Extend the "blessed" format list by including the CF-netCDF 5) Come up with an encoding specification (at least at the implementation level) for the CF-netCDF datasets returned by a getCoverage request. a) binary b) XML document + binary ?? 6) Adopt a WPS approach for asynch, proven in the DEWS WCS. (Note that there is some concern that this may be too ambitious for rapid implementation in the initial phase of WCS 1.0 Plus) I am sending a copy of this to the GALEON list because a key question is whether GALEON participants think this is a more productive approach than attempting further implementation and testnig of WCS 1.1 at this point. -- Ben _______________________________________________ galeon mailing list galeon@xxxxxxxxxxxxxxxxFor list information, to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/
-- Gerry Creager -- gerry.creager@xxxxxxxx Texas Mesonet -- AATLT, Texas A&M University Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983 Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843