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Convert from geodetic to parametric latitudes
Syntax
lat = geod2par(lat0) lat = geod2par(lat0,geoid) lat = geod2par(lat,units) lat = geod2par(lat,geoid,units)
Background
Longitudes have the same meaning whether the Earth is treated as a sphere or as an ellipsoid. However, the definition of latitude in the case of an ellipsoid is more complicated. Geodetic, or geographic, latitudes on an ellipsoid can be transformed to latitudes on an auxiliary sphere with certain properties.
Geodetic latitude: (also called geographic latitude) the angle a normal line passing through a surface point makes with the plane of the Equator.
Parametric latitude: latitudes on the set of spheres with parallel radii identical to the ellipsoidal parallel radii at every latitude.
Description
lat = geod2par(lat0) returns the geodetic latitudes provided in lat0 transformed to parametric latitudes, which are returned in lat.
lat = geod2par(lat0,geoid) defines the elliptical model of the Earth, given by the geoid vector geoid, from which lat0 is transformed. The default geoid is the same as the default of almanac('earth','geoid'), the 1980 Geodetic Reference System ellipsoid.
lat = geod2par(lat,geoid,units) defines the angle units of the inputs and outputs, where units is any valid angle units string. The default is 'degrees'.
Examples
See Also
almanac |
Planetary data |
geod2aut par2geod |
Other auxiliary latitude functions |
| | geod2iso | geod2rec | |