topic

• Discoveries in geography13
• Explorations and surveys11
• Pacific railroads11
• Geology10
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name

• Geological Survey (U.S.)9
• United States. Army. Corps of Topographical Engineers9
• United States. Congress (55th, 3rd session : 1898-1899)9
• Walcott, Charles D. (Charles Doolittle), 1850-19279
• Warren, G. K. (Gouverneur Kemble), 1830-18828
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collection

• Maps of North America50
• Maps of North and South America6
• Lawrence H. Slaughter Collection of English maps, charts, globes, books and atlases4
• Maps of the Arctic Regions2

place

• America13
• West (U.S.)12
• California11
• Alaska10
• United States, West7
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genre

• Topographic maps9
• Geological cross-sections4
• Geological maps3
• Military maps3
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publisher

• U.S. Congress10
• publisher not identified9
• War Dept., U.S. Pacific Rail Road Explorations & Surveys6
• Joan Blaeu3
• Corps of Engineers, War Department2
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division

type

• cartographic62
• still image6
• text2