Difference between revisions of "GENIE Gridspec Diagrams VerticalCoordSystem"
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| − | A vertical coordinate system provides a description of the vertical coordinates used by a grid [[ | + | A vertical coordinate system provides a description of the vertical coordinates used by a grid [[GENIE_Gridspec_Diagrams_Tile|tile]], and may include the coordinates themselves. Coordinates are specified using an "axis" and are encoded in a similar way to the [http://www.unidata.ucar.edu/software/netcdf/ncml/v2.2/AnnotatedSchema.html NcML] "values" element -- either every coordinate can be listed, or a start value and offset given for periodic coordinates. "point_indices" and "edge_indices" are used in a similar way to indicate which coordinates refer to cell edges, and which to grid points. |
[[Image:vertical_coord_system.png|center]] | [[Image:vertical_coord_system.png|center]] | ||
Latest revision as of 17:53, 26 February 2007
A vertical coordinate system provides a description of the vertical coordinates used by a grid tile, and may include the coordinates themselves. Coordinates are specified using an "axis" and are encoded in a similar way to the NcML "values" element -- either every coordinate can be listed, or a start value and offset given for periodic coordinates. "point_indices" and "edge_indices" are used in a similar way to indicate which coordinates refer to cell edges, and which to grid points.
The vertical coordinate system has two sub-types, "mass_based_type" and "space_based_type", which can be used to give more information about the vertical coordinates; the latter is shown below.
Note: the gridspec overview contains introductory and background information on the gridspec; more detailed information can be found in Balaji's gridspec document on the Earth System Curator website.