Triangulation points of the U.S. Coast and Geodetic Survey in Philadelphia and vicinity, 1885 ca.
Plan
Work Title:
Triangulation points of the U.S. Coast and Geodetic Survey in Philadelphia and vicinity, 1885 ca.
Surveyor:
Not named
Date:
1885 ca.
Size:
60 x 41 in.
Map Features:
Location of triangulation points used to create accurate surveys
Media:
Mounted
Scale:
1:20000, or 1 inch = 1666 feet
Source:
Image File(s):
RC-Q-01
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