1960 Map of Sumdum D-4

About this map

Tracy Arm cuts deeply through the mountainous terrain of the Tongass National Forest in this mid-century topographic record. The map documents a dramatic glacial landscape defined by the massive Sawyer Glacier and South Sawyer Glacier, which descend from high ice fields toward the tidewater. This survey reflects the complex maritime and international geography of the region, specifically marking the rugged boundary between Alaska and British Columbia along the high ridges. Compiled from aerial photographs taken in 1948 and 1961, with hydrographic data from a 1964 Coast and Geodetic Survey chart, the map shows a wilderness area devoid of roads or trails, where the deep fjords serve as the primary conduits for movement through the coastal mountains.