Topographic sheets—. Colorado, Blackhawk quadrangle, lat. 39° 45′-40°, long. 105° 15′-105° 30′. Scale 1:62,500, contour interval 100 ft.
Publication Title:
Colorado, Blackhawk quadrangle, lat. 39° 45′-40°, long. 105° 15′-105° 30′. Scale 1:62,500, contour interval 100 ft.
Display Title:
Topographic sheets—. Colorado, Blackhawk quadrangle, lat. 39° 45′-40°, long. 105° 15′-105° 30′. Scale 1:62,500, contour interval 100 ft.
Series Title:
Topographic sheets—
Corporate Agency Authors:
Geological Survey (Interior Department)
Sort Author:
Geological Survey (Interior Department)
Date:
[April 1906]
Publish Date ISO Format:
1906-04-01T00:00:00Z
Publication Start:
19060401
Publication End:
19060430
Corporate/Agency Author:
Geological Survey (Interior Department)
Publication month:
9
Publication year:
1906
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 town or natural 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 three-tenths of the area of the country, excluding Alaska, 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 3c each. In no case can orders be filled at the wholesale rate unless the sum remitted solely for topographic maps amounts to at least $3.00.
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 town or natural 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 three-tenths of the area of the country, excluding Alaska, 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 3c each. In no case can orders be filled at the wholesale rate unless the sum remitted solely for topographic maps amounts to at least $3.00.