# Uses of Class
org.apache.sis.referencing.datum.AbstractDatum

Packages that use AbstractDatum
Package
Description
org.apache.sis.referencing.datum
Relationship of a `CoordinateSystem` (an abstract mathematical entity) to the earth or other system.

- ## Uses of AbstractDatum in org.apache.sis.referencing.datum

  Subclasses of AbstractDatum in org.apache.sis.referencing.datum
  Modifier and Type
  Class
  Description
  `class`
  `DefaultEngineeringDatum`
  Defines the origin of an engineering coordinate reference system.
  `class`
  `DefaultGeodeticDatum`
  Defines the location and orientation of an ellipsoid that approximates the shape of the earth.
  `class`
  `DefaultImageDatum`
  Defines the origin of an image coordinate reference system.
  `class`
  `DefaultParametricDatum`
  Defines the origin of a parametric coordinate reference system.
  `class`
  `DefaultTemporalDatum`
  Defines the origin of a temporal coordinate reference system.
  `class`
  `DefaultVerticalDatum`
  Identifies a particular reference level surface used as a zero-height surface.
  Methods in org.apache.sis.referencing.datum that return AbstractDatum
  Modifier and Type
  Method
  Description
  `static AbstractDatum`
  AbstractDatum.`castOrCopy(Datum object)`
  Returns a SIS datum implementation with the values of the given arbitrary implementation.