A topo map provides a bird’s eye view of those concentric circles, allowing you to “see” both the height and shape of the mountain on the map.įrom the USGS Topo on Gaia GPS, the summit of Pu’umakanaka, Hawaii is a near-perfect cone as indicated by the evenly spaced and round contour lines. Areas with few contours appear relatively flat-more like a 2-tier birthday cake. A large mountain appears as a dense group of lines with a small circle in the center that represents the peak-just picture looking down at a wedding cake from above. It may be helpful to visualize contour lines as stacked “layers” of the landscape, similar to a layer cake. ![]() Think of contour lines as imaginary horizontal planes sliced through the terrain surface. They show the shape of the terrain, including its hills, slopes, and depressions, by tracing a constant line of elevation on the map that corresponds with the landscape in the real world.
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