Our distances are not driving distances, but are calculated as a 'straight-line' (or point-to-point) distance that starts in Long. A straight line distance ignores things like rivers, canyons, lakes, et cetera - it's truly a line from Point A (ie- Long) to Point B.
Our distance measurements begin at a specific point in Long. The point that we are using is located at these GPS coordinates - Latitude: 64.4036, Longitude: -155.4972 [Map]. In this case, the coordinates for Long have been provided by the Geographic Names Information System (GNIS).