Latitude and Longitude Activity Source: Geological Society of America, Adapted with permission. You may have seen or used Global Positioning System (GPS) devices in cars or on camping trips. These devices use data from satellites orbiting the Earth to locate places on our planet. GPS devices describe the locations to us in the form of latitude and longitude coordinates. Citizen scientists involved in the Geological Society of America’s EarthCaching project use GPS technology and latitude and longitude coordinates to locate places on the Earth. [Read More]