Relief shown by contours, hachures and spot heights. Depths shown by soundings and isolines.
"The base is a copy of a portion of chart T of the U.S. Coast and Geodetic Survey"--Base map.
Probably from: Maps and descriptions of routes of exploration in Alaska in 1898. Washington, D.C. : U.S. Geological Survey, 1899.
Base map overprinted in red.
To accompany: "Report. Public resolution no. 25, 55th Congress, 3d session"--Upper right margin.
Map 1. Map of Alaska showing explorations by U.S. Geological Survey in 1898 together with principal previous routes of exploration -- Map 2. Explorations in Alaska, 1898 : Sushitna River and adjacent territory -- Map 3. Explorations in Alaska 1898: Headwaters of Skwentna and Kuskokwim Rivers and vicinity of Katmai -- Map 4. Explorations in Alaska 1898: Middle Kuskokwim River and part of Bristol Bay -- Map 5. Explorations in Alaska 1898: Lower Kuskokwim River, Kanektok River, and Togiak Bay -- Map 6. Alaska, route of military expedition ... from Knik Arm to Tanana River -- Map 7. Alaska, military expedition ... Copper River and adjacent territory -- Map 8. Alaska military expedition ... Prince William Sound and vicinity -- Map 9. Explorations in Alaska ... portions of Tanana and White Rivers