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Primarily from the United States Government Printing Office Style Manual. [1] State names usually signify only parts of each listed state, unless otherwise indicated. Based on the BLM manual's 1973 publication date, and the reference to Clarke's Spheroid of 1866 in section 2-82, coordinates appear to be in the NAD27 datum.
Thus the state plane coordinate system is still useful. Originally, the state plane coordinate systems were based on the North American Datum of 1927 (NAD27). Later, the more accurate North American Datum of 1983 (NAD83) became the standard (a geodetic datum is the way a coordinate system is linked to the physical Earth). More recently there ...
This 1988 BLM map depicts the principal meridians and baselines used for surveying states (colored) in the Public Land Survey System. 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.
The Public Land Survey System of the United States was established by Congressional legislation in 1785, in order to provide an orderly mechanism for opening the Northwest Territory for settlement. The ordinance directed the Geographer of the United States, Thomas Hutchins , to survey an initial east-west base line.
U.S. Bureau of Land Management map showing the principal meridians of Louisiana, Mississippi, and Alabama. The Louisiana meridian, in longitude 92° 24′ 15″ west of Greenwich, extends from the Gulf of Mexico to the north boundary of Louisiana, and with the baseline through the initial point conforming to the parallel of 31° north latitude, governs all the surveys in the state west of the ...
In the first half of the 20th century, State Plane Coordinate Systems (SPCS) brought the simplicity and convenience of Cartesian coordinates to state-level areas, providing high accuracy (low distortion) survey-grade coordinates for use primarily by state and local governments. (Both of these planar systems remain in use today for specialized ...
As America's state-by-state abortion debate continues, what does the Louisiana Constitution say? After high-profile Ohio election, what does the Louisiana Constitution say about abortion? Skip to ...
Ohio: Brass marker with the shapes of the three states is located in a monument box beneath the surface of a rural road. Was set in 1999 [20] and is referenced by a granite marker 20 feet to the east on the Michigan-Ohio line. [21] Iowa: Minnesota: South Dakota