Markets

Washington, DC Boundary Stones

Between 1741 and 1792, 40 stones were placed at one-mile intervals to mark the boundaries of the city of Washington DC. AMT surveyed the stones using GPS and conventional survey methods so that they may be incorporated into the DC GIS geodatabase.

Project Details:

Between 1741 and 1792, 40 stones were placed at one-mile intervals to mark the boundaries of the city of Washington DC. Thirty eight of the stones either survived or have been replaced to their original locations and, in 1915 were surrounded by fencing by the Daughters of the American Revolution.

AMT surveyed the stones using GPS and conventional survey methods so that they may be incorporated into the DC GIS geodatabase. Once finished, the data will be compared with existing boundary data for the District and to determine whether a new boundary is warranted.

  • Fun fact: the distance between SE6 and SE7 is 5280.824ft….pretty good accuracy given the instruments they used way back then.
  • Surprisingly, the data lines up very well with the Right of Way poly dataset (Eastern/Southern/Western Ave etc)

For more information, visit http://boundarystones.org/ and http://boundarystones.org/articles/amt_1991.pdf

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