interface  | 
DerivedCRS | 
 A coordinate reference system that is defined by its coordinate conversion from another CRS
 but is not a projected CRS. 
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interface  | 
EngineeringCRS | 
 A 1-, 2- or 3-dimensional contextually local coordinate reference system. 
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interface  | 
GeneralDerivedCRS | 
A coordinate reference system that is defined by its coordinate
  conversion from another coordinate reference system.  
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interface  | 
GeocentricCRS | 
 A 3-dimensional coordinate reference system with the origin at the approximate centre of mass of the earth. 
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interface  | 
GeodeticCRS | 
 A 2- or 3-dimensional coordinate reference system associated with a geodetic datum. 
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interface  | 
GeographicCRS | 
 A 2- or 3-dimensional coordinate reference system based on an ellipsoidal approximation of the geoid. 
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interface  | 
ImageCRS | 
 A 2-dimensional engineering coordinate reference system applied to locations in images. 
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ParametricCRS | 
 A 1-dimensional coordinate reference system which uses parameter values or functions. 
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interface  | 
ProjectedCRS | 
 A 2-dimensional coordinate reference system used to approximate the shape of the earth on a planar surface. 
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interface  | 
TemporalCRS | 
 A 1-dimensional coordinate reference system used for the recording of time. 
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interface  | 
VerticalCRS | 
 A 1-dimensional coordinate reference system used for recording heights or depths. 
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