Triangulation, City of Philadelphia. U.S. Coast and Geodetic Survey, J. E. Hilgard, Supt. Observations made by C. H. VanOrden, Assistant, C. H. Sinclair, Assistant, under the direction of Spencer McCorkle, Assistant. , 1885
Plan
Title:
Triangulation, City of Philadelphia. U.S. Coast and Geodetic Survey, J. E. Hilgard, Supt. Observations made by C. H. VanOrden, Assistant, C. H. Sinclair, Assistant, under the direction of Spencer McCorkle, Assistant.
Creator:
McCorkle, Spencer C.
Date Created:
1885
Physical Format:
31 x 36 in.
Coverage:
Philadelphia and vicinity
Identifier:
RC-Q-03
Media:
Tracing
Map Features:
Location of triangulation points used to create accurate surveys
Scale:
1:20000, or 1 inch = 1666 feet
Source:
Image File(s)
RC-Q-03.jp2