2020 Map of Sumdum D-3 NW

About this map

The international border between Canada and the United States defines the character of this remote landscape, cutting diagonally through a wilderness primarily preserved within the Tongass National Forest. This 2020 topographic study captures a high-latitude region where political boundaries meet significant natural barriers. The map details the Public Land Survey System townships of t45s r77e and t46s r77e, providing a precise look at the drainage patterns and elevation contours that dictate movement through this trans-border terrain. It is a specialized record of a place where the human footprint is limited to the survey lines that mark the edge of two nations.