1. University of Calgary, Department of Geography, 2500 University Drive NW, Calgary, Alberta, Canada, T2N 1N4, ;
2. University of Calgary, Geography, 2500 University Drive NW, University of Calgary, Calgary, Alberta, Canada, T2N 1N4, ;
3. Ventus Geospatial, Calgary, Alberta, Canada;
4. Parhelion Consulting, Edmonton, Alberta, Canada;