Our distances are not driving distances, but are calculated as a 'straight-line' (or point-to-point) distance starting from Thoms Place. A straight line distance ignores things like rivers, canyons, lakes, et cetera - it's truly a line from Point A (ie- Thoms Place) to Point B.
Our distance measurements begin at a specific point in Thoms Place. The point that we are using is located at these GPS coordinates - Latitude: 56.2019, Longitude: -132.1850 [Map]. In this case, the coordinates for Thoms Place have been provided by the Geographic Names Information System (GNIS).