**3.1 Global positioning system (GPS)**

GPS, one of the most important parts of PA, enables precise recording of coordinates (latitude and longitude) to accurately map and pinpoint the location of the device or sensor as the data is collected and then aggregates all of these locations and data to create a visual geographic map. GPS is widely used on drones, sensors, tractors, and other farm machinery. GPS enables machinery to operate autonomously and aid in soil testing, tractor driving with a parallel steering system, and VRA for precise seed and fertilizer application.
