2021 Map of Sumdum A-1 SW

About this map

The international border between Canada and the United States of America cuts diagonally across this high-altitude landscape, marking the northern boundary of the Tongass National Forest. This 2021 survey focuses on a remote glaciated region where the terrain is dominated by the bowl-like depression of the Witches Cauldron in the northwest. The map captures the intricate contours of the Coast Mountains, where sharp ridgelines and deep glacial valleys define the wilderness. Without roads or settlements, the topography reveals a pristine environment governed by elevation and the historic geopolitical line separating Alaska from British Columbia.