2021 Map of Sumdum D-4 NE

About this map

Sawyer Glacier dominates the central terrain of this high-latitude region within the Tongass National Forest. The landscape is defined by extreme elevations and glacial activity, with Mt Hill standing as a prominent landmark along the international boundary. This border, separating the United States and Canada, cuts diagonally across the northeastern corner of the map. The topography illustrates the complex relationship between maritime climate and ice-field geography, where steep mountain ridges give way to massive ice sheets and drainage basins. Surveyed in the early 21st century, the map details the precise alignment of the frontier and the extent of protected forest lands in this part of the Alaska Panhandle.