From the fascinating blog Modern Mechanix, which reprints items from old popular science magazines, this item on Inuit mapping from the September 1933 issue of Popular Science:

The text: “An Eskimo, who had never before seen a map, has just provided the Library of Congress with the first accurate chart of the islands of Dis-ko Bay, Greenland. After a careful survey by sledge and kayak, he whittled relief models of the islands from driftwood and painted them in colors to show lakes, marshes, and vegetation. Sewed to sealskin, they form the map illustrated at left.”