Changes between Initial Version and Version 1 of Cf2CrsWkt


Ignore:
Timestamp:
10/20/11 02:59:17 (8 years ago)
Author:
pbentley
Comment:

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  • Cf2CrsWkt

    v1 v1  
     1= Mapping from CF Grid Mapping Attributes to CRS WKT Elements =
     2
     3These ''provisional'' mappings have been compiled to support, among other things, CF proposal [ticket:69].
     4If you spot any errors or omissions, please email the author or the CF mailing list, or else update this wiki page.
     5
     6Mappings are only listed for the current set of CF grid mapping attributes -- there are a number of WKT elements,
     7and many CRS PARAMETERs, for which there are no corresponding CF attributes.
     8
     9The order of attributes follows Table F.1 in the CF conventions document.
     10
     11The names of WKT PARAMETER elements follow the names of coordinate operation parameters
     12defined in the [http://www.epsg-registry.org/ EPSG geodetic parameter registry].
     13
     14|| '''CF Grid Mapping Attribute''' || '''Corresponding WKT Element''' ||
     15|| `earth_radius` || `SPHEROID["<name>", <semi-major-axis>, 0.0, ...]` ||
     16|| `false_easting` || `PARAMETER["False easting", <value>]` ||
     17|| `false_northing` || `PARAMETER["False northing", <value>]` ||
     18|| `grid_mapping_name` || no known equivalent ||
     19|| `grid_north_pole_latitude` || no known equivalent ||
     20|| `grid_north_pole_longitude` || no known equivalent ||
     21|| `inverse_flattening` || `SPHEROID["<name>", <semi-major-axis>, <inverse-flattening>, ...]` ||
     22|| `latitude_of_projection_origin` || `PARAMETER["Latitude of natural origin", <value>]` ||
     23|| `longitude_of_central_meridian` || `PARAMETER["Longitude of natural origin", <value>]` ||
     24|| `longitude_of_prime_meridian` || `PRIMEM["<name>", <longitude>, ...]` ||
     25|| `longitude_of_projection_origin` || `PARAMETER["Longitude of natural origin", <value>]` ||
     26|| `north_pole_grid_longitude` || no known equivalent ||
     27|| `perspective_point_height` || `PARAMETER["Viewpoint height", <value>]` ||
     28|| `scale_factor_at_central_meridian` || `PARAMETER["Scale factor at natural origin", <value>]` ||
     29|| `scale_factor_at_projection_origin` || `PARAMETER["Scale factor at natural origin", <value>]` ||
     30|| `semi_major_axis` || `SPHEROID["<name>", <semi-major-axis>, <inverse-flattening>, ...]` ||
     31|| `semi_minor_axis` || no direct equivalent, the `SPHEROID` element is used to define ellipsoid geometry ||
     32|| `standard_parallel` (one parallel) || `PARAMETER["Latitude of standard parallel", <value>]` ||
     33|| `standard_parallel` (two parallels) || `PARAMETER["Latitude of 1st standard parallel", <value>], PARAMETER["Latitude of 2nd standard parallel", <value>]` ||
     34|| `straight_vertical_longitude_from_pole` || `PARAMETER["Longitude of origin", <value>]` ||
     35
     36[[br]]
     37-- Phil Bentley, Oct 2011