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Point of Beginning, U.S. Public Lands
Society: ASCEMain Category: CivilSub Category: Boundaries & SurveysEra: 1750-1799DateCreated: 1785East LiverpoolState: OHZip: 43920Country: USAWebsite: http://www.asce.org/Project/Point-of-Beginning,-U-S--Public-Lands/Creator: Hutchins, Thomas

The "Land Ordinance of 1785" required that U.S. lands in the public domain be surveyed before sale, and that the surveys be made in accordance with a consistent, integrated system of lines grid-oriented to a true meridian (north-south reference line) and base line (east-west reference line), subdividing the land into approximately square parcels, called townships.  

Thomas Hutchins, the first Geographer of the United States, drove his stake near East Liverpool, Ohio to mark the Point of Beginning of the Geographer's Line, the first westward base line.

YearAdded:
1985
Image Credit: Courtesy Wikipedia/Nyttend Image Caption: This monument marks the site that served as the basis for the entire Public Land Survey System — the system by which most of the United States, outside of the original colonies, was surveyed.Era_date_from: 1785
Borden Base Line
Society: ASCEMain Category: CivilSub Category: Boundaries & SurveysEra: 1830-1839DateCreated: 1831South DeerfieldState: MACountry: USAWebsite: http://www.asce.org/Project/Borden-Base-Line/Creator: Paine, Robert Treat , Borden, Simeon

The Borden Base Line is a 39,009.73 feet (7.42 miles ) survey line through the State of Massachusetts. The line was the first project of its kind undertaken in America and its establishment was the key element for Massachusetts pioneering mandate to survey the entire state. 

The challenge was to use trigonometrical principles, instead of astronomical observation alone, to provide greater accuracy in surveying large areas.

YearAdded:
1981
Image Credit: Public Domain (Copyright Exp.)Image Caption: An 1871 map of Massachusetts highlighting the Borden Base LineEra_date_from: 1831
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