RTK GPS surveying
This technique of GPS surveying allows for one person surveying capabilities in positioning, mapping and quantity surveys. RTK surveying requires a GPS receiver (Base Station) be setup on a point with known coordinates and receive satellite signals to determine the stations coordinates and compare them to the previously determined known coordinates. Once the difference is calculated the correction is calculated it then transmitted to another receiver (Rover) that is simultaneously tracking the same satellites. The roving GPS receiver then uses the transmitted data to remove most of the error thus determining accurate positioning in real time. RTK surveying is commonly used for construction surveying, topographic surveying, and volumetric surveying.