1951 Map of Sumdum C-6

About this map

Admiralty Island dominates this mid-century coastal survey, specifically where the land mass narrows into the prominent Glass Peninsula. The map illustrates a landscape defined by federal stewardship, bifurcated between the Tongass National Forest and the Admiralty Island National Monument (Wilderness). Navigational landmarks such as Midway Pt and Pt League line the edges of Stephens Passage and the Seymour Canal, serving as critical reference points in an area with no established roads or trails. High peaks like Yeek-Sha Mtn provide vertical contrast to the extensive Tidal Flat areas of Pleasant Bay. This data, based on 1948 aerial photography and 1889 hydrographic surveys, preserves the precise boundaries of the Lighthouse Reserve and other maritime markers long used for Alaska coastal navigation.