National Mapping Program Technical Instructions: Standards for USGS and USDA Forest Service Single Edition Quadrangle Maps (PDF) (Draft for Implementation ed.). The base line for the fourth principal meridian runs straight west from the. It intersects the third principal meridian at a point near Centralia, Illinois. It is a latitudinal line with a reading of 38 degrees, 28 minutes, and 20 seconds north of the equator. Also known as the Rectangular Survey System, it was created by the Land Ordinance of 1785. The base line for the second and third principal meridians in Illinois is the same.
Ohio River (1785) - also part of Indiana.Base Line of the United States Military Survey (1797).Some parts of the Ohio Lands (now Ohio) were laid out in survey townships, but based on other points not listed above: Principal Meridian has its Base Line, and these two lines form the basis or. Followed by Guide Road / Old Guide Road / Washington State Route 539 in Whatcom County, Meridian Street in Bellingham, Washington. by Metes and Bounds is to have a known land-mark for a place of beginning. Guide meridian created 12 miles east of Willamette Meridian, which is in Salish Sea at this latitude. Illinois (W of Illinois River and 3rd principal meridian) State names usually signify only parts of each listed state, unless otherwise indicated.īased 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.
Primarily from the United States Government Printing Office Style Manual.
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