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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.
In the United States Public Land Survey System, a principal meridian is the principal north–south line used for survey control in a large region, and which divides townships between east and west. The meridian meets its corresponding baseline at the point of origin, or initial point, for the land survey. For example, the Mount Diablo Meridian ...
The Public Land Survey System (PLSS) is the surveying method developed and used in the United States to plat, or divide, real property for sale and settling. Also known as the Rectangular Survey System, it was created by the Land Ordinance of 1785 to survey land ceded to the United States by the Treaty of Paris in 1783, following the end of the ...
A prime meridian is an arbitrarily chosen meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle. This great circle divides a spheroid, like Earth, into two hemispheres: the Eastern ...
0–9. First principal meridian. Second principal meridian. Third principal meridian. Fourth principal meridian. Fifth principal meridian. Sixth principal meridian.
Meridian (geography) 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] In other words, it is a line of longitude.
Washington meridians. Coordinates: 38.895103°N 77.0514428°W. The Washington meridians are four meridians that were used as prime meridians in the United States which pass through Washington, D.C. The four that have been specified are: through the Capitol. through the White House. through the old Naval Observatory.
Boise meridian. The Boise meridian is one of the 35 principal meridians of the Public Land Survey System of the United States. Adopted in 1867, its longitude is 116° 23′ 35″ (or 116° 24′ 15″ [ 1]) west from Greenwich and its principal baseline is latitude 43° 22′ 21″ north. [ 2] The meridian and baseline intersect approximately ...