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Figure 1. This BLM map depicts the principal meridians and baselines used for surveying states (colored) in the PLSS.. The following are the principal and guide meridians and base lines of the United States, with the year established and a brief summary of what areas' land surveys are based on each.
Part of map of Upper Silesia (1746) with Latin message: Longitudines numeratæ à primo Meridiano per Ins(ulam) Ferri Dutch map from 1720 over the North Pole with the Ferro Meridian. The line of longitude running through El Hierro (Ferro), the westernmost of the Canary Islands , was known in European history as the prime meridian in common use ...
The meridian 44° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, the Atlantic Ocean, South America, the Southern Ocean, and Antarctica to the South Pole.
The modern standard, the IERS Reference Meridian, is based on the Greenwich meridian, but differs slightly from it. [1] This prime meridian (at the time, one of many) was first established by Sir George Airy (in 1851). In 1883, the International Geodesic Association formally recommended to governments that the meridian through Greenwich be ...
Meridians run between the North and South poles. In geography and geodesy, a meridian is the locus connecting points of equal longitude, which is the angle (in degrees or other units) east or west of a given prime meridian (currently, the IERS Reference Meridian). [1]
The 180th meridian or antimeridian [1] is the meridian 180° both east and west of the prime meridian in a geographical coordinate system. The longitude at this line can be given as either east or west. On Earth, the prime and 180th meridians form a great ellipse that divides the planet into the Western and Eastern Hemispheres.
Meridian (astronomy), imaginary circle in a plane perpendicular to the planes of the celestial equator and horizon Central meridian (astronomy) Meridian (geography), a longitude line, i.e. a line of constant longitude, or in other words an imaginary arc on the Earth's surface from the North Pole to the South Pole
The meridian is the central axis of time zones with the UTC+01:00 offset, including Central European Time [1] and West Africa Time. From Pole to Pole