Our distances are not driving distances, but are calculated as a 'straight-line' distance from Letcher. A straight line distance ignores things like rivers, canyons, lakes, et cetera - it's truly a line from Point A (ie- Letcher) to Point B.
Our distance measurements begin at a specific point in Letcher. The point that we are using is located at these GPS coordinates - Latitude: 34.7520, Longitude: -86.1622 [Map]. In this case, the coordinates for Letcher have been provided by the Geographic Names Information System (GNIS).