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#107: CF Data Model 1.7 -----------------------------+---------------------------------------------- Reporter: markh | Owner: [email protected] Type: task | Status: new Priority: medium | Milestone: Component: cf-conventions | Version: Resolution: | Keywords: -----------------------------+---------------------------------------------- Comment (by jonblower): Hi Mark, Jim, My reading of the standard is that `grid_mapping` points to something that looks like a CRS definition, and the "true latitude and longitude" coordinates are supplied by the `coordinates` attribute. Even though it's redundant, both of these may be used for the convenience of clients. I'm not sure what is meant in Mark's document by a "derived" coordinate. This seems to be an association of coordinates in one CRS with a defined formula to transform into another one. I would argue that vertical sigma coordinates '''do''' fall into this definition, but horizontal coordinates '''do not''', because CF does not (currently) supply the formula to translate to another system (it describes the CRS instead, which is different, leaving the application to figure out the transformation). Cheers, Jon -- Ticket URL: <https://cf-pcmdi.llnl.gov/trac/ticket/107#comment:33> CF Metadata <http://cf-pcmdi.llnl.gov/> CF Metadata This message came from the CF Trac system. To unsubscribe, without unsubscribing to the regular cf-metadata list, send a message to "[email protected]" with "unsubscribe cf-metadata" in the body of your message.
