Outdoor enthusiasts: your adventure is waiting - in vivid detail. TOPO U.S. 24K - Great Lakes brings you the highest level of topographic detail available, with maps comparable to 1:24,000 scale USGS maps. These highly detailed maps include terrain contours, topo elevations, summits, routable roads and trails, parks, coastlines, rivers, lakes and geographical points - and they also display 3-D terrain shading on compatible devices. TOPO maps are ideal for hiking, hunting, camping, cycling and communing with nature. Coverage includes topographic detail of Wisconsin, Michigan, Illinois, Indiana and Ohio.