+JL_HSTRE Posted November 21, 2022 Share Posted November 21, 2022 Have there been any challenge caches based on USGS quadrangle series (quad maps)? Delorme maps were used in early geocaching challenges because the atlases were relatively easy to purchase. However, quad maps are now freely available through a USGS online database. They also have the advantage that of being produced by the federal government, not a business, which avoids any commercial issues. Also, some Delorme editions changed how the state grid is laid out and thus qualification depends on the edition. Quadrangle don't change what areas each quad/page covers. Quote Link to comment
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