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How current are US Topo maps?

US Topo maps are remade every three years. The US Topo production schedule follows the U.S. Department of Agriculture's National Agricultural Imagery Program (NAIP) collection schedule. The linework features shown on the maps are generated from the latest data holdings in The National Map and other standard sources. The overall goal of the project is for each map to be current to within three years at the time of publication, though there is considerable variation in actual feature currency due to the variety of data sources used and their varying revision schedules.

Tags: Maps, Topographic, Recreation, Quadrangle, GeoPDF, Scale