USGS Topo
Description
Official topo maps from the United States Geological Survey (USGS). This quilt of digitized 1:24,000 USGS quadrangles covers the entire contiguous United States. Each quad covers 7.5 minutes of longitude by 7.5 minutes of latitude. The date of last update varies by region.
Attribution
© Gaia GPS, USGS Current (Other Vendor Before 1/22/2021)
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