Our distances are not driving distances, but are calculated as a 'straight-line' distance starting from Sheshalik. A straight line distance ignores things like rivers, canyons, lakes, et cetera - it's truly a line drawn from Point A (ie- Sheshalik) to Point B.
Our distance measurements begin at a specific point in Sheshalik. The point that we are using is located at these GPS coordinates - Latitude: 66.9942, Longitude: -162.8281 [Map]. In this case, the coordinates for Sheshalik have been provided by the Geographic Names Information System (GNIS).