Guide Meridian
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The following are the
principal Principal may refer to: Title or rank * Principal (academia), the chief executive of a university ** Principal (education), the head of a school * Principal (civil service) or principal officer, the senior management level in the UK Civil Ser ...
and guide meridians and base lines of the
United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
, with the year established and a brief summary of what areas' land surveys are based on each.


List of meridians

Primarily from the
United States Government Printing Office The United States Government Publishing Office (USGPO or GPO), formerly the United States Government Printing Office, is an agency of the Legislature, legislative branch of the Federal government of the United States, United States federal gove ...
''Style Manual''. GPO stock number 021-000-00178-3 (paper). 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.


Principal Meridians


Guide Meridians


Ohio Lands

Some parts of the
Ohio Lands The Ohio Lands were the several grants, tracts, districts and cessions which make up what is now the U.S. state of Ohio. The Ohio Country was one of the first settled parts of the Midwest, and indeed one of the first settled parts of the United St ...
(now
Ohio Ohio ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the ...
) were laid out in survey townships, but based on other points not listed above: * Base Line of the United States Military Survey (1797) * Great Miami River baseline (1798) *
Ohio River The Ohio River () is a river in the United States. It is located at the boundary of the Midwestern and Southern United States, flowing in a southwesterly direction from Pittsburgh, Pennsylvania, to its river mouth, mouth on the Mississippi Riv ...
(1785) — also part of
Indiana Indiana ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Michigan to the northwest, Michigan to the north and northeast, Ohio to the east, the Ohio River and Kentucky to the s ...
* Muskingum River baseline (1800) * Scioto River baseline (1799) *
Twelve Mile Square Reserve The Twelve Mile Square Reservation, also called the Twelve Mile Square Reserve, was a tract of land in Ohio ceded by Indians to the United States of America in the Treaty of Greenville in 1795. This particular area of land immediately surroundin ...
(1805)


See also

*
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. Also known as the Rectangular Survey System, it was created by the Land Ordinance of 17 ...
— the basis of most meridians in the United States


References

{{reflist * Principal and guide meridians and base lines