Module org.opengis.geoapi
Package org.opengis.referencing.datum
package org.opengis.referencing.datum
Relationship of a Coordinate System (CS) to the Earth, another celestial body or a platform.
For geodetic
and vertical
coordinate reference systems (CRS), the datum is known as reference frame
and shall relate the coordinate system to the Earth or other celestial body.
With other types of CRSs, the datum may relate the coordinate system
to another physical or virtual object. It may be a moving platform such as a car.
The datum itself is not timedependent, but any transformations of the associated coordinates
to an Earthfixed or other coordinate reference system may contain timedependent parameters.
Dynamic reference frame
If the subtype ofDatum
is geodetic or vertical, the framedefining parameters may
include time evolution to describe the motions of points used to define the reference frame.
Then the geodetic or vertical reference frame is
dynamic. Since:
 1.0
Departure from OGC/ISO standard for closer integration with the Java environment
TheCalendar
code list is omitted because the handling of calendar systems
is delegated to the java.time
framework.

ClassDescriptionSpecifies the relationship of a coordinate system to an object.Creates datum objects using authority codes.DatumEnsemble<D extends Datum>Collection of datums which for low accuracy requirements may be considered to be insignificantly different from each other.Builds up complex datum objects from simpler objects or values.Reference frame in which some of the defining parameters have time dependency.Geometric figure that can be used to describe the approximate shape of a planet.Identification of the origin of an engineering (or local) coordinate reference system.Position, scale and orientation of a geocentric Cartesian 3D coordinate system relative to the planet.Deprecated.Identification of a particular reference surface used as the origin of a parametric coordinate system.Deprecated.This code list has been removed from ISO 19111:2019 together with
ImageDatum
.Definition of the origin from which longitude values are determined.Specification of the method by which the vertical reference frame is realized.Definition of the relationship of a temporal coordinate system to an object.Identification of a particular reference level surface used as a zeroheight surface.Deprecated.Replaced byRealizationMethod
in ISO 19111:2019.
EngineeringDatum
as of ISO 19111:2019.