1956 USGS Tower Peak, Ca Quad

Tower Peak in Yosemite National Park. 2 issues to choose from with one being a folded edition for hiking , offered for 1/2 off with contact we'll send you a coupon.

16 x 21" Copper Engraved Topographic map , first and last generation of these in Green, Tan & White as opposed to the former Blue and Tan, created by the US Geological Survey in 1/62,500 scale. Aka: still a 15 Minute Sheet sectioning the United States in conjunction with the Township and Range Grid established by the US Coast Survey through earlier surveys. This series is the first in depth mapping of the nation , done by 6 man survey teams walking the nation with the tools of the surveying trade to document the topography, geology, areal geology, structural geology and economic geology of the United States. 20' ft. contour lines in sepia define the real human scale of the maps, geologies in color assist in visualizing the complex conceptual content . Containing state of the art printing and data content produced and updated through the 20th century and used as baseline for all economic and environmental exploitation , as intended by design. Inclusive of riparian information, roads, trails and all existing structures. Technical obsolescence and Library De-accesssion has made these once common maps both rare and desirable , with availability in the open market uncommon with other dealers. Produced in great numbers and readily available these were the hiking, biking, fishing and building maps essential then and so helpful today to trace historical information. Current GPS data is based in part on this analog hand made map. Fine Condition