Dear Rich > Yes, I think your answer before is the answer now, but I'm just clear > on the details. Would you specify sea_surface_height above NAVD88 > like this? > > float zeta(y=1534, x=2122); > :standard_name = "sea_surface_height_above_reference_datum"; > :grid_mapping = "Albers_Projection"; > > int Albers_Projection; > :grid_mapping_name = "albers_conical_equal_area"; > :standard_parallel = 20.5, 27.5; // double > :longitude_of_central_meridian = -89.0; // double > :latitude_of_projection_origin = 24.0; // double > :false_easting = 0.0; // double > :false_north = 0.0; // double > :vertical_datum = 'urn:ogc:def:datum:epsg::5103'
I'm not clear still what NAVD88 is though. SSH must be above some surface. Is this surface a reference ellipsoid or a geoid? These are two different standard names: sea_surface_height_above_geoid sea_surface_height_above_reference_ellipsoid whereas sea_surface_height_above_reference_datum is not an existing stdname. If it's a reference ellipsoid, it can be described already by grid_mapping parameters. To name a geoid, we'd need a new attribute of grid_mapping, but I don't think that would be problematic. Best wishes Jonathan _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
