Class  Description 

AbstractDatum 
Specifies the relationship of a coordinate system to the earth, thus creating a coordinate reference system.

BursaWolfParameters 
Parameters for a geographic transformation between two datum.

DefaultEllipsoid 
Geometric figure that can be used to describe the approximate shape of the earth.

DefaultEngineeringDatum 
Defines the origin of an engineering coordinate reference system.

DefaultGeodeticDatum 
Defines the location and precise orientation in 3dimensional space of a defined ellipsoid
(or sphere) that approximates the shape of the earth.

DefaultImageDatum 
Defines the origin of an image coordinate reference system.

DefaultPrimeMeridian 
A prime meridian defines the origin from which longitude values are determined.

DefaultTemporalDatum 
A temporal datum defines the origin of a temporal coordinate reference system.

DefaultVerticalDatum 
A textual description and/or a set of parameters identifying a particular reference level
surface used as a zeroheight surface.

Convenience methods were added to the default ellipsoid class in order to compute orthodromic distance.
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