A graticule of latitude and longitude values is applied to the ellipsoid.


Namespace: FDF.Common.CoordinateSystems
Assembly: FDF.Common (in FDF.Common.dll)

Syntax

Visual Basic (Declaration)
PublicInterfaceICrsPrimeMeridian
ImplementsICrsInfo
C#
publicinterfaceICrsPrimeMeridian:ICrsInfo
C++
interface classICrsPrimeMeridian:ICrsInfo
J#
publicinterfaceICrsPrimeMeridianimplementsICrsInfo
JScript
publicinterfaceICrsPrimeMeridianextendsICrsInfo

Types that implement ICrsPrimeMeridian

Remarks

Latitude has a natural starting point in the equator. There is no natural starting point for longitude, known as the prime meridian, which is arbitrarily defined. Historically national systems usually adopted their national astronomical observatory as the starting point for longitude. The meridian through Greenwich has been accepted as the international norm for over a century, but its adoption for geodetic purposes has lagged somewhat. Longitudes based on other prime meridians, for example Paris, remain in use today. Longitude is unambiguous only when the prime meridian is defined.

See Also