Package org.geotools.referencing.datum
Datum implementation. An explanation for this
package is provided in the OpenGIS® javadoc.
The remaining discussion on this page is specific to the Geotools implementation.
Extensions to OpenGIS API
Convenience methods were added to the default ellipsoid class in order to compute orthodromic distance.

Class Summary 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.