Class DefaultGeocentricCRS

Object
FormattableObject
AbstractIdentifiedObject
AbstractReferenceSystem
AbstractCRS
DefaultGeocentricCRS
All Implemented Interfaces:
Serializable, Formattable, Deprecable, Lenient­Comparable, Printable, Coordinate­Reference­System, Geocentric­CRS, Geodetic­CRS, Single­CRS, Identified­Object, Reference­System
public class DefaultGeocentricCRS extends AbstractCRS implements GeocentricCRS
A 2- or 3-dimensional coordinate reference system with the origin at the approximate centre of mass of the earth. This class is used for geodetic CRS that are not geographic, and is named "geocentric" for historical reasons. Note that ISO 19111 does not define a Geocentric­CRS interface.

Used with datum type: Geodetic.
Used with coordinate system types: Cartesian or Spherical.

Creating new geocentric CRS instances

New instances can be created either directly by specifying all information to a factory method (choices 3 and 4 below), or indirectly by specifying the identifier of an entry in a database (choices 1 and 2 below). Choice 1 in the following list is the easiest but most restrictive way to get a geocentric CRS. The other choices provide more freedom.
  1. Create a Geodetic­CRS from one of the static convenience shortcuts listed in Common­CRS​.geocentric().
  2. Create a Geodetic­CRS from an identifier in a database by invoking Geodetic­Authority­Factory​.create­Geocentric­CRS(String).
  3. Create a Geodetic­CRS by invoking the CRSFactory​.create­Geocentric­CRS(…) method (implemented for example by Geodetic­Object­Factory).
  4. Create a Geodetic­CRS by invoking the constructor.
Example: the following code gets a geocentric CRS using the World Geodetic System 1984 datum: 
GeodeticDatum datum = CommonCRS.WGS84.geocentric();

Immutability and thread safety

This class is immutable and thus thread-safe if the property values (not necessarily the map itself), the coordinate system and the datum instances given to the constructor are also immutable. Unless otherwise noted in the javadoc, this condition holds if all components were created using only SIS factories and static constants.
Since:
0.4
See Also:

  • Constructor Details

  • Method Details

    • castOrCopy

      public static DefaultGeocentricCRS castOrCopy(GeodeticCRS object)
      Returns a SIS coordinate reference system implementation with the same values as the given arbitrary implementation. If the given object is null, then this method returns null. Otherwise if the given object is already a SIS implementation, then the given object is returned unchanged. Otherwise a new SIS implementation is created and initialized to the attribute values of the given object.
      Parameters:
      object - the object to get as a SIS implementation, or null if none.
      Returns:
      a SIS implementation containing the values of the given object (may be the given object itself), or null if the argument was null.
      Throws:
      Illegal­Argument­Exception - if the coordinate system of the given CRS is not Cartesian or spherical.

    • getInterface

      public Class<? extends GeocentricCRS> getInterface()
      Returns the GeoAPI interface implemented by this class. The SIS implementation returns Geocentric­CRS​.class.

      Note for implementers

      Subclasses usually do not need to override this method since GeoAPI does not define Geocentric­CRS sub-interface. Overriding possibility is left mostly for implementers who wish to extend GeoAPI with their own set of interfaces.
      Returns:
      Geocentric­CRS​.class or a user-defined sub-interface.

    • getDatum

      public final GeodeticDatum getDatum()
      Returns the geodetic reference frame associated to this geocentric CRS. This property may be null if this CRS is related to an object identified only by a datum ensemble.
      Specified by:
      get­Datum in interface Geodetic­CRS
      Specified by:
      get­Datum in interface Single­CRS
      Returns:
      the geodetic reference frame, or null if this CRS is related to an object identified only by a datum ensemble.

    • getDatumEnsemble

      public DefaultDatumEnsemble<GeodeticDatum> getDatumEnsemble()
      Returns a collection of datums which, for low accuracy requirements, may be considered to be insignificantly different from each other. This property may be null if this CRS is related to an object identified only by a single datum.
      Warning: in a future SIS version, the return type may be changed to the org​.opengis​.referencing​.datum​.Datum­Ensemble interface. This change is pending GeoAPI revision.
      Returns:
      the datum ensemble, or null if this CRS is related to an object identified only by a single datum.
      Since:
      1.5

    • forConvention

      public DefaultGeocentricCRS forConvention(AxesConvention convention)
      Returns a CRS equivalent to this one but with axes rearranged according the given convention. If this CRS is already compatible with the given convention, then this method returns this.
      Overrides:
      for­Convention in class Abstract­CRS
      Parameters:
      convention - the axes convention for which a coordinate reference system is desired.
      Returns:
      a coordinate reference system compatible with the given convention (may be this).
      See Also:

    • formatTo

      protected String formatTo(Formatter formatter)
      Formats this CRS as a Well Known Text Geodetic­CRS[…] element.

      Example

      Well-Known Text (version 2) of a geocentric coordinate reference system using the WGS 84 datum. 
      GeodeticCRS["Geocentric",
  Datum["World Geodetic System 1984",
    Ellipsoid["WGS84", 6378137.0, 298.257223563, LengthUnit["metre", 1]]],
    PrimeMeridian["Greenwich", 0.0, AngleUnit["degree", 0.017453292519943295]],
  CS["Cartesian", 3],
    Axis["(X)", geocentricX],
    Axis["(Y)", geocentricY],
    Axis["(Z)", geocentricZ],
    LengthUnit["metre", 1]]

      Same coordinate reference system using WKT 1. Note that axis directions are totally different.

      GEOCCS["Geocentric",
  DATUM["World Geodetic System 1984",
    SPHEROID["WGS84", 6378137.0, 298.257223563]],
    PRIMEM["Greenwich", 0.0],
  UNIT["metre", 1],
  AXIS["X", OTHER],
  AXIS["Y", EAST],
  AXIS["Z", NORTH]]
      Parameters:
      formatter - the formatter where to format the inner content of this WKT element.
      Returns:
      "Geodetic­CRS" (WKT 2) or "Geoc­CS" (WKT 1).
      See Also: