Also for what it s worth the high res topo maps of Canada NRCan made appear to still be available online via mytopo com this link should show the MT SK NWT tripoint marked with a survey monument symbol and the numbers 157 There are no topo maps at this scale just to the east including where the NU NWT boundary is shown on smaller scale lower res topo maps I m not sure why that is The topo cutoff is marked District of Mackenzie a pre Nunavut name whose boundary was along 102 00 W although never surveyed on the ground