Magellan has announced eXplorist 310 and 510 Topo Editions (the latter is pictured above), which will come bundled with a one-year subscription to National Geographic TOPO, offering 1:24,000 and 1:100,000 scale USGS-based topos. According to the news release, you will also be able to “view a unique collection of road and trail data that shows a complete network of back roads and trails on a national scale.” read more