1. Government of the Northwest Territories, NWT Centre for Geomatics, 4923–52nd street, Yellowknife, Northwest Territories, X1A 2L9, Canada
2. Department of Geography and Environment, Alberta Terrestrial Imaging Centre (ATIC), University of Lethbridge, 4401 University Drive West, Lethbridge, Alberta, T1K 3M4, Canada
3. Canadian Forest Service, Natural Resources Canada, 5320 –122 Street, Edmonton, Alberta, T6H 3S5, Canada