Yosemite National Park Map 1914A longtime USGS employee, John H. Renshaw, used existing topographic data of the area to create his relief map of Yosemite. He replaced the contour lines from previously created USGS topographic maps with color gradations to indicate the relief. The resulting full color map of the park beautifully illustrated the topographic features, including rivers, roads, trails, and other points of interest.