Our distances are not driving distances, but are calculated as a 'point-to-point' distance. A straight line distance ignores things like rivers, canyons, lakes, et cetera - it's truly a line from Point A (ie- London) to Point B.Our distance measurements begin at a specific point in London. The point we use is located at these GPS coordinates - Latitude: 35.8698, Longitude: -83.0021 In this case, the coordinates for London have been provided by the Geographic Names Information System (GNIS).