Topographic sheets. Iowa-Illinois, Savanna sheet, lat. 42°-42° 15′, long. 90°-90° 15′. Scale 1:62,500, contour interval 20 ft.
Publication Title:
Iowa-Illinois, Savanna sheet, lat. 42°-42° 15′, long. 90°-90° 15′. Scale 1:62,500, contour interval 20 ft.
Display Title:
Topographic sheets. Iowa-Illinois, Savanna sheet, lat. 42°-42° 15′, long. 90°-90° 15′. Scale 1:62,500, contour interval 20 ft.
Corporate Agency Authors:
Geological Survey and Interior Department
Sort Author:
Geological Survey
Date:
Edition of July 1892, reprinted Sept. 1898
Publish Date ISO Format:
1898-09-01T00:00:00Z
Publication Start:
18980901
Publication End:
18980930
Corporate/Agency Author:
Geological Survey
Publication month:
4
Publication year:
1898
Notes:
NOTE.—The Geological Survey is making a topographic map of the United States. The sheets of which it is composed are projected without reference to political divisions, and are designated by some prominent feature found on them. Three, scales are used, 1:62,500, 1:125,000, and 1:250,000. These correspond, approximately, to 1 mile, 2 miles, and 4 miles to 1 linear inch on the map. The size, unless otherwise given, is about 17.5 inches in height by 11.5 to 16 inches in width, exclusive of the margin, the width varying with the latitude. A description of the topographic map is printed on the reverse of each sheet catalogued below. About one-fifth of the area of the country has been mapped, nearly every State being represented. Massachusetts, Connecticut, Rhode Island, New Jersey, and the District of Columbia are completely mapped. Sheets of the regular size are sold by the Survey at 5c each; but in lots of 100 or more copies, whether of the same sheet or of different sheets the price is 2c each.
Notes:
NOTE.—The Geological Survey is making a topographic map of the United States. The sheets of which it is composed are projected without reference to political divisions, and are designated by some prominent feature found on them. Three, scales are used, 1:62,500, 1:125,000, and 1:250,000. These correspond, approximately, to 1 mile, 2 miles, and 4 miles to 1 linear inch on the map. The size, unless otherwise given, is about 17.5 inches in height by 11.5 to 16 inches in width, exclusive of the margin, the width varying with the latitude. A description of the topographic map is printed on the reverse of each sheet catalogued below. About one-fifth of the area of the country has been mapped, nearly every State being represented. Massachusetts, Connecticut, Rhode Island, New Jersey, and the District of Columbia are completely mapped. Sheets of the regular size are sold by the Survey at 5c each; but in lots of 100 or more copies, whether of the same sheet or of different sheets the price is 2c each.