Topographic maps are valuable tools that can be used to show how the environment has changed over time. A topographic map, or "topo map," is a way to show mountains and valleys on a flat piece of paper. Topographic maps are handy and necessary for many uses, including building roads and hiking trails in the mountains.
These are examples of various topographic maps of the same location. Look carefully at the maps and their characteristics.
Sources of images used for this section as they appear, top to bottom: