What is Mason–Dixon line?
[[File:Mason-dixon-line.gif|thumb|300px|{{center|Map of the original Mason–Dixon line}}]] The '''Mason–Dixon line''', also called '''Mason's and Dixon's line''' was the [[border]] between [[Maryland]] and [[Pennsylvania]]. It was [[Surveying|surveyed]] and marked between 1763 and 1767.<ref name=MackenzieUD>{{cite web |url=http://www1.udel.edu/johnmack/mason_dixon/ |title=A brief history of the Mason-Dixon Line |author=John Mackenzie |publisher=University of Delaware |access-date=27 June 2016 |archive-date=17 July 2018 |archive-url=https://web.archive.org/web/20180717185851/http://www1.udel.edu/johnmack/mason_dixon/ |url-status=dead }}</ref> Two [[English people|English]] [[surveyor]]s, [[Charles Mason]] and [[Jeremiah Dixon]], were hired by the [[William Penn|Penn]] and [[Cecilius Calvert, 2nd Baron Baltimore|Calvert]] families to settle a [[border dispute]].<ref name=mdlHIST>{{cite web |url=http://www.history.com/this-day-in-history/mason-and-dixon-draw-a-line |title=1767 Mason and Dixon draw a line |website=This Day in History |publisher=A&E Television Networks, LLC |access-date=27 June 2016}}</ref> In 1760 the [[British government]] was tired of the [[violence]] between the two [[colonies]]. They demanded the dispute over the border between Maryland and Pennsylvania be settled according to an agreement made in 1732.<ref name=mdlHIST/> The line the two surveyors came up with was so [[accurate]] it is still considered a [[wikt:marvel|marvel]].<ref>{{cite web |url=http://www.surveyorshistoricalsociety.com/drawingLine.php |title=Drawing the Line |author=William Ecenbarger |publisher=Surveyors Historical Society |access-date=27 June 2016 |archive-date=23 June 2016 |archive-url=https://web.archive.org/web/20160623234754/http://www.surveyorshistoricalsociety.com/drawingLine.php |url-status=dead }}</ref> [[GPS]] measurements show the line to be off by an [[inch]] (2.54 [[cm]]) or less in places and no more than {{convert|800|ft|m}} in others.<ref name=TrivediNGN>{{cite web |url=http://news.nationalgeographic.com/new