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1948 Map of Sumdum C-6

Name: 1948 Topographic Map of Sumdum C-6
Creator: U.S. Geological Survey
Published: 1957
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1957

About this map

The Glass Peninsula forms a prominent landmass on this 1948 aerial survey, separating the waters of Seymour Canal from the open Stephens Passage. This portion of Admiralty Island is defined by its dramatic coastal features and maritime navigation landmarks, including a designated Lighthouse Reserve on the peninsula's eastern shore. The interior terrain rises sharply to summits like Yeek-Sha Mtn, while the coastline is notched with sheltered waters such as Pleasant Bay and Sore Finger Cove.

Evidence of the region's geological character is found in named landmarks like The Stone Wall and the numerous tidal flats that emerge along the canal. This map, compiled from mid-century aerial photography and hydrographic charts, records the coastal wilderness of the Tongass National Forest before modern development, highlighting hazards like Thistle Ledge and the distinct points of Pt Lookout and Pt League that guided mariners through these Alaskan waterways.