Changes between Version 24 and Version 25 of PotentialDataModelTypes


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Timestamp:
09/19/12 02:22:55 (7 years ago)
Author:
markh
Comment:

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  • PotentialDataModelTypes

    v24 v25  
    4040A UML diagram will be displayed here when sufficient types have been agreed upon.
    4141
     42== Examples of Types ==
     43
     44=== Example 1 ===
     45
     46 * Field:
     47  * A data variable in a CF NetCDF file is an example of a Field, e.g.:
     48   * a standard name of 'specific_humidity'
     49   * a unit of '1'
     50   * a 2D array of data values, size: (n,m)
     51 * Coordinate:
     52  * This type does not have an example, it can be thought of as an abstract type, which provides common functionality to it's tangible sub-types.
     53 * !DimensionCoordinate (Coordinate):
     54  * The example Field may be defined with respect to a regular horizontal grid; this Field would have:
     55   * !DimensionCoordinate:
     56    * a long name name of 'easting'
     57    * a unit of 'm'
     58    * a 1D array of values, size:n
     59   * !DimensionCoordinate:
     60    * a long name name of 'northing'
     61    * a unit of 'm'
     62    * a 1D array of values, size:m
     63 * !AuxiliaryCoordinate (Coordinate):
     64  * The example Field may be defined at an instant in time, with a set of height values, one for each data value; this Field would have:
     65   * !AuxiliaryCoordiante:
     66    * a standard name of 'time'
     67    * a temporal unit and calendar
     68    * a single value
     69    * a pair of bounds values
     70   * !AuxiliaryCoordiante:
     71    * a standard name of 'height_above_reference_ellipsoid'
     72    * a unit of 'm'
     73    * a 2D array of values, size:(n,m) 
     74 * !CoordinateSystem:
     75  * The spatial Coordinates of the Field may be defined with respect to a coordinate reference system:
     76   * a definition of the OSGB CRS
     77 * !CellMethod:
     78  * The values in the Field are aggregated over time, so the Field has:
     79   * !CellMethod
     80    * a coordinate label of 'time'
     81    * an operator 'mean'