Topographic maps. Pennsylvania, Norristown sheet, lat. 40°—40° 15′,long.75° 15′—75° 30′. Scale 1:62,500, contour interval 20 ft.
Publication Title:
Pennsylvania, Norristown sheet, lat. 40°—40° 15′,long.75° 15′—75° 30′. Scale 1:62,500, contour interval 20 ft.
Display Title:
Topographic maps. Pennsylvania, Norristown sheet, lat. 40°—40° 15′,long.75° 15′—75° 30′. Scale 1:62,500, contour interval 20 ft.
Corporate Agency Authors:
Geological Survey and Interior Department
Sort Author:
Geological Survey
Date:
Ed. of Mar. 1896
Publish Date ISO Format:
1896-03-01T00:00:00Z
Publication Start:
18960301
Publication End:
18960331
Corporate/Agency Author:
Geological Survey
Publication month:
10
Publication year:
1896
Notes:
NOTE.—The topographic sheets, projected without reference to political divisions, are designated by some prominent feature found on them. Three seales 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 20 by 16 inches. They are issued as working editions for the use of geologists of the United States Geological Survey, and are not published for general distribution or for sale. About 900 sheets hare been produced since 1883, covering, more or less, every State and Territory except Alaska. Massachusetts, Rhode Island, Connecticut, New Jersey, and the District of Columbia are completely mapped.
Notes:
NOTE.—The topographic sheets, projected without reference to political divisions, are designated by some prominent feature found on them. Three seales 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 20 by 16 inches. They are issued as working editions for the use of geologists of the United States Geological Survey, and are not published for general distribution or for sale. About 900 sheets hare been produced since 1883, covering, more or less, every State and Territory except Alaska. Massachusetts, Rhode Island, Connecticut, New Jersey, and the District of Columbia are completely mapped.