Dictionary

GPS: An acronym for Global Positioning System.

geological maps: A type of map that includes the geography of land, as well as the locations of important geological features such as fault lines.

geography: The study of the surface of the Earth.

global positioning system: A system that uses satellites and computers to determine an object's location on the Earth.

global positioning system receivers: Devices that receive signals from aerial satellites and other ground locations. These devices are part of a global positioning system.

grid: The structures formed by the lines on a map that help users find locations.

hemisphere: One half of the Earth

historical map: A type of map that shows how a location or place looked at a given point in history.

imagery: Pictures.

intersection: The point where two or more streets meet and cross.