National Geographic : 1912 Jul
OUTLINE MAP SHOWING ALASKA-CANADA BOUNDARY LINE The heavy black line along the 14Ist meridian denotes the completed part of the bound ary. The coast boundary, ending at Mount Saint Elias, is practically completed. The dotted lines show the routes followed from Whitehorse when going to the field. "The maps, when published, will be among the finest of their kind in the world; besides showing the differences of elevation and drainage, they will also differentiate, by means of symbols, between the various growths of timber and show their density. The character of the country, whether of swamp or tundra, will also be shown. A line of precise levels, run from tidewater to a point on the boundary, furnishes the initial elevation for mapping, whence elevations for triangulation are taken and extended trigonometrically both north and south."