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#95: Development of CF 1.5 Data Model -----------------------------+---------------------------------------------- Reporter: markh | Owner: [email protected] Type: task | Status: new Priority: medium | Milestone: Component: cf-conventions | Version: Resolution: | Keywords: -----------------------------+---------------------------------------------- Comment (by markh): The discussion on Field is still open for comment, but I would like to continue discussions. With that In mind I request comments on the proposed text for a !DimensionCoordinate: Dimension coordinate construct A dimension coordinate construct indicates the physical meaning and locations of the cells for a unique domain axis of the field. A dimension coordinate construct may contain * A scalar or one-dimensional numerical coordinate array of the size specified for the domain axis. The elements of the coordinate array must all be of the same numeric data type, they must all have different non- missing values, and they must be monotonically increasing or decreasing. Dimension coordinate constructs cannot have string-valued coordinates. In this data model, a CF-netCDF string-valued coordinate variable or string- valued scalar coordinate variable corresponds to an auxiliary coordinate construct (not a dimension coordinate construct), with a domain axis which is not associated with a dimension coordinate construct. * A two-dimensional boundary coordinate array, whose slow-varying (second in Fortran) dimension equals the size specified by the domain axis construct, and whose fast-varying dimension is two, indicating the extent of the cell. For climatological time dimensions, the bounds are interpreted in a special way indicated by the cell methods. * Properties (in the same sense as for the field construct) serving to describe the coordinates. In this data model we permit a domain axis not to have a coordinate array if there is no appropriate numeric monotonic coordinate. That is the case for a dimension that runs over ocean basins or area types, for example, or for a domain axis that indexes timeseries at scattered points. Such domain axes do not correspond to a continuous physical quantity. (They will be called index dimensions in CF version 1.6.) -- Ticket URL: <https://cf-pcmdi.llnl.gov/trac/ticket/95#comment:16> 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.
