Sketch J No. 9 Showing the Progress of the Survey in the Bay of San Francisco California U.S. Coast Survey

YEAR PUBLISHED: 1851

Sketch J No. 9 Showing the Progress of the Survey in the Bay of San Francisco California

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SKU: 56

DESCRIPTION

Triangulation progress survey chart of the Bay of San Francisco from Farallon Islands into the bay. Shows many base stations, points and astronomical stations.

IMPORTANT NOTE:

All of our United States Coast Survey (USCS), United States Coast & Geodetic Survey (USC&GS), and similar maps and charts have been professionally unfolded and flattened using humidity baths, semi-permeable membrane and drying blotter techniques. Most others you typically see on eBay have not been, and worse, are quickly and crudely unfolded for the low quality photos you see. Unfolding these maps in that way is damaging and weakens them. Please be aware.

FULL TITLE

Sketch J No. 9 Showing the Progress of the Survey in the Bay of San Francisco California

MAPMAKER/CARTOGRAPHER/AUTHOR

U.S. Coast Survey, Bache, A. D. Superintendent

PUBLISHER

PUBLICATION

Sketches Accompanying the Annual Report of the Superintendent of the United States Coast Survey, 1851 Senate Executive Document no. 48

DIMENSIONS (Inches)

10.5 X 9

CONDITION

Very good with minor toning and discoloration at folds as is typical of USCS maps. Folds as issued.