org.opengis.referencing.datum
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 name
initial value is "Greenwich", and that value shall be
used when the greenwich longitude value is
zero.
- Since:
- GeoAPI 1.0
- Author:
- Martin Desruisseaux (IRD)
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.
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