Our distances are not driving distances, but are calculated as a 'point-to-point' distance starting from Diamond Ridge. A straight line distance ignores things like rivers, canyons, lakes, et cetera - it's truly a line from Point A (ie- Diamond Ridge) to Point B.
Our distance measurements begin at a specific point in Diamond Ridge. The point that we are using is located at these GPS coordinates - Latitude: 59.6761, Longitude: -151.5575 [Map]. In this case, the coordinates for Diamond Ridge have been provided by the Geographic Names Information System (GNIS).