Prime Meridian
The zero meridian, used as a reference line from which longitude east and west is measured. It passes through Greenwich, England.
The longitude positions on WGS84 agree with those on the older North American Datum 1927 at roughly 85° longitude west, in the east-central USA. By contrast, the zero meridian of WGS84 is about 100 metres east of the "traditional" Prime Meridian at ...
Meridians are numbered east and west from 0� at the prime meridian to a common 180� meridian. The prime meridian used for US military mapping and charting coincides with the Bureau International de I'Heure defined as zero meridian, ...
 See also: Coordinate, Elevation, Adjustment, Axis, Geodetic
  
|
RSS
