Our distances are not driving distances, but are calculated as a 'point-to-point' distance. A straight line distance ignores obstructions like rivers, canyons, lakes, et cetera - it's truly a line from Point A (ie- Green Hill) to Point B.Our distance measurements begin at a specific point in Green Hill. The point we use is located at these GPS coordinates - Latitude: 36.3037, Longitude: -82.4560 In this case, the coordinates for Green Hill have been provided by the Geographic Names Information System (GNIS).