1960 Map of Sumdum D-4

About this map

Tongass National Forest dominates this coastal Alaskan landscape, where the dramatic meeting of ice and sea is meticulously documented through data from 1948 and 1961 surveys. The glacial activity of Sawyer Glacier and South Sawyer Glacier has carved deep inlets, most notably the winding waters of Tracy Arm. This 1960 edition, with revisions through 1984, captures the formal designation of the Tracy Arm-Fords Terror Wilderness following the Alaska National Interest Lands Conservation Act. The map also traces the international boundary between the United States and Canada, marking the divide between Alaska and British Columbia along the high ridges above the ice fields.