National Geographic- Alaska, like much of the Arctic, is remote, often ice- and fog-bound, and is therefore among the poorest mapped places on the planet. Some of the coastal charts still use data compiled by Captain Cook.
Whereas existing topographical maps don’t resolve features smaller than a hundred feet across, the new maps have a horizontal resolution of around 7 to 17 feet. Their vertical resolution is comparable, but in some places they show elevation differences of less than two feet.
