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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.
The rock marked by the commissioners in 1813, rather than the rock marked by Ellicott in 1811, is often mistakenly called Ellicott Rock or Ellicott's Rock. To clarify this misnomer , it is also called Commissioners Rock ; it is commonly accepted as the tripoint where the boundary lines of South Carolina, North Carolina, and Georgia meet.
Andrew Ellicott taught Lewis and Clark how to use a sextant to map their position. Lewis and Clark would leave from Wood River, Illinois and document the wilderness all the way to the Pacific Ocean. Lincoln: politics and surveying
The charters for both colonies referenced a 1608 map based on John Smith’s survey of the ... astronomers David Rittenhouse and Andrew Ellicott would finally extend the line to its terminus—5 ...
The teams met at Ellicott's Rock, located along the Chattooga River, which was constructed by astronomer and surveyor Andrew Ellicott in 1811, marking what he determined to be the tripoint of Georgia, North Carolina, and South Carolina, and continued westward until they reached the location where the Georgia and Tennessee teams had stopped ...
Because Georgia was not willing to accept the 1807 commission's conclusion, Georgia hired prominent surveyor Andrew Ellicott to survey the boundary once again. [3] Ellicott reinforced what the commission had found and marked the location of the border at Ellicott's Rock on the east bank of the Chattooga River. [4]
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.