Our distances are not driving distances, but are calculated as a 'straight-line' distance from Sunnyside. A straight line distance ignores things like rivers, canyons, lakes, et cetera - it's truly a line from Point A (ie- Sunnyside) to Point B.
Our distance measurements begin at a specific point in Sunnyside. The point that we are using is located at these GPS coordinates - Latitude: 57.9828, Longitude: -136.2522 [Map]. In this case, the coordinates for Sunnyside have been provided by the Geographic Names Information System (GNIS).