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#104: Clarify the interpretation of scalar coordinate variables -----------------------------+---------------------------------------------- Reporter: jonathan | Owner: [email protected] Type: enhancement | Status: new Priority: medium | Milestone: Component: cf-conventions | Version: Resolution: | Keywords: -----------------------------+---------------------------------------------- Comment (by taylor13): Dear all, I vote against ticket 105 and I favor 104, but I think the wording is still not ideal for the addition to the end of section 5.7 which is proposed to read: "If a data variable has two or more scalar coordinate variables, they are regarded as though they were all independent coordinate variables with dimensions of size one. If two or more single-valued coordinates are not independent, but have related values (for instance, time and forecast period, or vertical coordinate and model level number, Section 6.2), they should be stored as coordinate or auxiliary coordinate variables of the same size one dimension, not as scalar coordinate variables." For the second sentence do we mean: "If two or more single-valued coordinates are not independent, but have related values (for instance, station number and station name or vertical coordinate and model level number or station number and station name, Section 6.2), then one should be stored as a coordinate of size one dimension and the rest should be stored as associated auxiliary coordinate variables." I was confused by "should be stored as coordinate or auxiliary coordinate variables". Which is it? Note besides modifying the end of the sentence, I replaced one of the "for instances"; it seems to me that time and forecast period would often be considered to be independent coordinates, no? I'm not familiar with forecasting terminology, but I would think "period" would indicate the time since initialization whereas "time" would indicate the time at the end of the period. These would be independent only if you assume all forecasts were initiated at the same time. Please clarify this before accepting the ticket. thanks, Karl -- Ticket URL: <https://cf-pcmdi.llnl.gov/trac/ticket/104#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.
