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Fig. 2-2a. Photo. A picture taken from ground level (Dante's View) across Death Valley. This is the type of data with which we are most accustomed.
Fig. 2-2b. Satellite photo. A photo taken from orbit above Death Valley. These images can be very helpful in picking out large features on the surface (which may also be more difficult to see from the ground). Aerial and satellite images are also taken using infrared cameras and radars.
Fig. 2-2c. Topographic map. A 2D map of the topography shows how elevations change across part of Death Valley. These maps are typically used as the base for geologic maps. You can buy maps like this for minimal cost.
Fig. 2-2d. Shaded relief map. A topographic map with subtle shading that helps to accentuate mountains, valleys, plateaus, and canyons. Areas that are flat or have few features are smooth on the map, whereas areas with steep slopes and mountains appear more rough and cast shadows.
Fig. 2-2e. Digital elevation model (DEM). A 3D model of the topography generated using a computer and a database of elevations. These often make visualizing landscapes fairly easy.
Fig. 2-2f. Topographic profile. These diagrams show the changes in elevation along a line connecting points on the surface. Profiles very plainly show the changes in slope of the ground between points on the surface.

Figure 2-2. Different representations of the same landscape.