Melting glaciers are keeping a special team of cartographers at Swisstopo, Switzerland’s national mapping agency, busy: they’re the ones charged with making changes to the Swiss alps on Swisstopo’s maps. The New York Times reports:

“The glaciers are melting, and I have more work to do,” as Adrian Dähler, part of that special group, put it.

Dähler is one of only three cartographers at the agency—the Federal Office of Topography, or Swisstopo—allowed to tinker with the Swiss Alps, the centerpiece of the country’s map. Known around the office as “felsiers,” a Swiss-German nickname that loosely translates as “the people who draw rocks,” Dähler, along with Jürg Gilgen and Markus Heger, are experts in shaded relief, a technique for illustrating a mountain (and any of its glaciers) so that it appears three-dimensional. Their skills and creativity also help them capture consequences of the thawing permafrost, like landslides, shifting crevasses and new lakes.

The article is a fascinating look at an extraordinarily exacting aspect of cartography. [WMS]