org.cts.datum
Class AbstractDatum

java.lang.Object
  org.cts.IdentifiableComponent
      org.cts.datum.AbstractDatum

All Implemented Interfaces:

Datum, Identifiable

Direct Known Subclasses:

GeodeticDatum, VerticalDatum

public abstract class AbstractDatum
extends IdentifiableComponent
implements Datum

A datum (plural datums) is a reference from which measurements are made.

In surveying and geodesy, a datum is a reference point on the earth's surface against which position measurements are made, and an associated model of the shape of the earth for computing positions. Horizontal datums are used for describing a point on the earth's surface, in latitude and longitude or another coordinate system. Vertical datums are used to measure elevations or underwater depths. In engineering and drafting, a datum is a reference point, surface, or axis on an object against which measurements are made.

(Taken from wikipedia on 2006-10-06)

Author:

Michaël Michaud

Field Summary

Fields inherited from interface org.cts.Identifiable

DEFAULT, LOCAL, UNKNOWN

Constructor Summary

protected

AbstractDatum(Identifier identifier, Extent extent, String origin, String epoch) Creates a new Datum.

Method Summary

String	getEpoch() Returns the realization epoch of this Datum as a String.
Extent	getExtent() Returns the valid extent of this Datum.
String	getOrigin() Returns the description of this Datum origin.
String	toString() Returns a String representation of this Datum.

Methods inherited from class org.cts.IdentifiableComponent

addAlias, addRemark, equals, getAliases, getAuthorityKey, getAuthorityName, getCode, getComponent, getIdentifier, getName, getRemarks, getShortName, hashCode, setIdentifier, setRemarks, setShortName

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.cts.datum.Datum

getEllipsoid, getPrimeMeridian, getToWGS84

Methods inherited from interface org.cts.Identifiable

addAlias, addRemark, getAliases, getAuthorityKey, getAuthorityName, getCode, getName, getRemarks, getShortName, setRemarks, setShortName

Constructor Detail

AbstractDatum

protected AbstractDatum(Identifier identifier,
                        Extent extent,
                        String origin,
                        String epoch)

Creates a new Datum.

Parameters:

identifier - the identifier of this Datum

extent - valid domain extent (extent definition depends on the kind of Datum)

origin - description of the origin or anchor point of this Datum.

epoch - epoch of this Datum realization

Method Detail

getExtent

public Extent getExtent()

Returns the valid extent of this Datum.

Specified by:

getExtent in interface Datum

getOrigin

public String getOrigin()

Returns the description of this Datum origin.

Specified by:

getOrigin in interface Datum

getEpoch

public String getEpoch()

Returns the realization epoch of this Datum as a String.

Specified by:

getEpoch in interface Datum

toString

public String toString()

Returns a String representation of this Datum.

Overrides:

toString in class IdentifiableComponent