The Science of Surveying
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The Science of Surveying. by Mrs. Leone. Surveying. The science of plotting maps of a specific locale Includes finding its boundaries, calculating its area, and measuring its elevation above sea level Uses geometry and trigonometry to measure angles and distances. - PowerPoint PPT Presentation
Transcript of The Science of Surveying
The Science of Washington, D.C.
The Science of Surveyingby Mrs. LeoneSurveyingThe science of plotting maps of a specific localeIncludes finding its boundaries, calculating its area, and measuring its elevation above sea levelUses geometry and trigonometry to measure angles and distances
Surveying Washington, D.C. 1791-1792Chief Surveyor: Major Andrew Ellicott, age 37 (here at age 45)Surveyors: Benjamin EllicottJoseph Ellicott, age 31 (as an older man)Isaac BriggsGeorge FenwickBenjamin Banneker, age 60 (here at age 64)Surveying Washington, D.C.
The survey began at Jones Point, acapelocated at the confluence ofHunting Creekand the Potomac River south of Alexandria, VA.
looking southSurveying Washington, D.C. An area containing the full 100 square miles (260km2) that the Residence Act had authorized on July 6, 1790Each side was 10 miles (16km) long. Theaxes between the corners of the square ran northsouth and eastwest.The Original Map of DC
Check it out! It was measured in poles!1 pole = 16.5 feet1 mile = 320 poles
Surveying Washington, D.C. The survey team placedsandstoneboundary markersat or near every mile point along the sides of the square. Many of these markers still remain. The west cornerstone is at the west corner ofArlington County, Virginia.The north cornerstone is south of East-West Highway nearSilver Spring, Maryland, west of 16th St.The east cornerstone is east of the intersection ofSouthern Aveand Eastern Ave.
Surveying Washington, D.C.What did D.C. look like before it was D.C.?
video of Canadian surveyors doing their thing
old fashioned surveyors tools
