org.cts.datum

Interface Datum

All Superinterfaces:

Identifiable

All Known Implementing Classes:

AbstractDatum, GeodeticDatum, VerticalDatum

public interface Datum
extends Identifiable

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

Method Summary

Modifier and Type	Method and Description
Ellipsoid	getEllipsoid() Returns the ellipsoid of this datum.
String	getEpoch() Returns the realization epoch as a String.
Extent	getExtent() Returns the valid extent of this Datum.
String	getOrigin() Returns origin description of this Datum.
PrimeMeridian	getPrimeMeridian() Returns the primemeridian of this datum.
CoordinateOperation	getToWGS84() Returns the ellipsoid of this datum.

Methods inherited from interface org.cts.Identifiable

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

Method Detail

getOrigin

String getOrigin()

Returns origin description of this Datum.

getExtent

Extent getExtent()

Returns the valid extent of this Datum.

getEpoch

String getEpoch()

Returns the realization epoch as a String.

getEllipsoid

Ellipsoid getEllipsoid()

Returns the ellipsoid of this datum.

getToWGS84

CoordinateOperation getToWGS84()

Returns the ellipsoid of this datum.

getPrimeMeridian

PrimeMeridian getPrimeMeridian()

Returns the primemeridian of this datum.