Maps are used to represent the Earth's surface and show the relationship between locations. A map depicts features like distance, direction, and size on a flat surface that can be easily transported. Different types of maps serve various purposes. Topographic maps represent 3D terrain with contour lines and are used by hikers and engineers. Geologic maps show rock formations and are used by geologists. Biogeographic maps illustrate where animals and plants live and are used by scientists to understand species ranges. Environmental maps depict features like forests, climate, and oceans used by meteorologists and planners.