{"thcode":61,"term":{"code":447,"name":"altimetry","parent":400,"scope":"used for all instruments and techniques that determine altitude, either directly or remotely, including (but not limited to) pressure altimeters, radar altimeters, GPS, and LIDAR."},"uf":[{"name":"altimetry measurement","usewith":false}],"bt":[{"code":400,"name":"field observation","parent":398,"scope":"scientific investigation of physical or biological features and processes in a natural setting."},{"code":398,"name":"research method","parent":1,"scope":null},{"code":1,"name":"Marine Realms Information Bank (MRIB) keyword categories","parent":null,"scope":null}],"nt":[],"rt":[{"code":417,"name":"Global Positioning System (GPS) observations","parent":400,"scope":"the use of satellite signals from the Global Positioning System to determine the precise location of a terrestrial receiver."}]}