As he visualized paddling along the east coast of Greenland in an umiak, Danish explorer Gustav Holm held in his hand generations of navigational know-how. It was the 1880s—long before Siri and satellites were around to lead the way—and Holm was palming a chunk of wood about as long as an iPhone 7. Carved by a Greenlandic Inuit man, this precious piece served as a tactile map, its toothy edges representative of the fjords, headlands, and obstacles of the unforgiving coastline. As Holm ran a finger along the map, he felt a semicircular groove—a sign that he and his party would have to go overland with their boats if they made it that far north. This was just one of several subtle cues he could glean from the map that would help make an exploration safe and successful.
As Holm observed, the Tunumiit people of eastern Greenland had a sharp eye for nature and could accurately describe a place they had visited once, even 20 years earlier. The man who produced the carving was especially skilled, and created two others that accompanied it. A knobby stick about as long as a Super Big Gulp straw represents the islands off the coast, and a thicker, wand-like carving corresponds to a peninsula, with ridges and mounds that mirror the relief of the mountains.
By Raina Delisle

The design of the maps offers a glimpse into the mind of the maker and his understanding of his world. The coastline map, which is read down one side and up the other, does not include every landmark, and the archipelago map appears to omit some islands from the chain. “The maps show how these people understood their own land and seascape and compartmentalized the various sections,” says Harmsen, who is researching the history of the maps. “You can see what was important to the maker by what he included in those maps.”