Interface PrimeMeridian

All Superinterfaces:

Identified­Object

All Known Implementing Classes:

Default­Prime­Meridian

@UML(identifier="CD_PrimeMeridian",
     specification=ISO_19111)
public interface PrimeMeridian
extends IdentifiedObject

A prime meridian defines the origin from which longitude values are determined. The default name is "Greenwich", and that value shall be used when the greenwich longitude value is zero.

Since:

1.0

Field Summary

Fields inherited from interface IdentifiedObject

ALIAS_KEY, IDENTIFIERS_KEY, NAME_KEY, REMARKS_KEY

Modifier and Type	Field	Description
static final String	ALIAS_KEY	Key for the "alias" property to be given to the object factory create­Foo(…) methods.
static final String	IDENTIFIERS_KEY	Key for the "identifiers" property to be given to the object factory create­Foo(…) methods.
static final String	NAME_KEY	Key for the "name" property to be given to the object factory create­Foo(…) methods.
static final String	REMARKS_KEY	Key for the "remarks" property to be given to the object factory create­Foo(…) methods.

Method Summary

Modifier and Type	Method	Description
Unit<Angle>	get­Angular­Unit()	Returns the angular unit of the Greenwich longitude.
double	get­Greenwich­Longitude()	Longitude of the prime meridian measured from the Greenwich meridian, positive eastward.

Methods inherited from interface IdentifiedObject

get­Alias, get­Identifiers, get­Name, get­Remarks, to­WKT

Modifier and Type	Method	Description
Collection<Generic­Name>	get­Alias()	An alternative name by which this object is identified.
Set<Reference­Identifier>	get­Identifiers()	An identifier which references elsewhere the object's defining information.
Reference­Identifier	get­Name()	The primary name by which this object is identified.
International­String	get­Remarks()	Comments on or information about this object, including data source information.
String	to­WKT()	Returns a Well Known Text (WKT) for this object.

Method Details

getGreenwichLongitude

@UML(identifier="greenwichLongitude",
     obligation=CONDITIONAL,
     specification=ISO_19111)
double getGreenwichLongitude()

Longitude of the prime meridian measured from the Greenwich meridian, positive eastward. The greenwich­Longitude initial value is zero, and that value shall be used when the meridian name value is "Greenwich".

Returns:

The prime meridian Greenwich longitude, in angular unit.

getAngularUnit

@UML(identifier="getAngularUnit",
     specification=OGC_01009)
Unit<Angle> getAngularUnit()

Returns the angular unit of the Greenwich longitude.

Returns:

The angular unit of greenwich longitude.