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Andrew Ellicott (January 24, 1754 – August 28, 1820) was an American land surveyor who helped map many of the territories west of the Appalachians, surveyed the boundaries of the District of Columbia, continued and completed Pierre (Peter) Charles L'Enfant's work on the plan for Washington, D.C., and served as a teacher in survey methods for Meriwether Lewis.
On January 1, 1793, Andrew Ellicott submitted to the commissioners a report that stated that the boundary survey had been completed and that all of the boundary marker stones had been set in place. Ellicott's report described the marker stones and contained a map that showed the boundaries and topographical features of the Territory of Columbia.
Benjamin Banneker (1731-1806) was a free African American mathematician and astronomer who assisted Andrew Ellicott during the first three months of the 1792 — 1793 survey of the District of Columbia's original boundaries. [7] The stone is one of 40 markers that once lined the District's boundaries.
The charters for both colonies referenced a 1608 map based on John ... perceptions of the line’s location,” writes historian ... and Andrew Ellicott would finally extend the line to its ...
The location had been prescribed in part in 1787 by the Treaty of Beaufort, though the river was not named explicitly, but rather as a then-undiscovered tributary of the Savannah River between Georgia and South Carolina. The nominal latitude of 35°N was later specified by the U.S. Congress. Rock marked by Ellicott in 1811, highlighted in red chalk
On January 1, 1793, Andrew Ellicott submitted to the commissioners a report that stated that the boundary survey had been completed and that all of the boundary marker stones had been set in place. Ellicott's report described the marker stones and contained a map that showed the boundaries and topographical features of the Territory of Columbia.
The first north-south line, Eastern Ohio Meridian, was to be the western boundary of Pennsylvania, sometimes called Ellicott's Line [3] after Andrew Ellicott, who had been in charge of surveying it, and the first east-west line (called the Geographer's Line or Base Line) was to begin where the Pennsylvania boundary touched the north bank of the ...
Ellicott's Stone, also known as the Ellicott Stone, is a boundary marker in northern Mobile County, Alabama. It was placed on April 10, 1799, by a joint U.S. - Spanish survey party headed by Andrew Ellicott .