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 (alternate image)
Work 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. , 1885
Surveyor:
McCorkle, Spencer C.
Date:
1885
Size:
31 x 36 in.
Image Note:
The colors in this image may have been adjusted to enhance legibility, and may not accurately reflect the original item.
Map Features:
Location of triangulation points used to create accurate surveys
Media:
Tracing
Scale:
1:20000, or 1 inch = 1666 feet
Source:
Image File(s):
RC-Q-03
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