{"thcode":2,"term":{"code":2078,"name":"navigational data","parent":474,"scope":"Geospatial data indicating the locations of instruments, vessels, aircraft, or other vehicles used to collect scientific observations.  These data include horizontal coordinates in sequence, and may include time or vertical position."},"uf":[{"name":"flight lines","usewith":false},{"name":"ship tracklines","usewith":false},{"name":"ship tracks","usewith":false},{"name":"survey flight lines","usewith":false},{"name":"survey navigation data","usewith":false},{"name":"survey ship tracklines","usewith":false},{"name":"survey tracklines","usewith":false},{"name":"survey tracks","usewith":false}],"bt":[{"code":474,"name":"geospatial datasets","parent":235,"scope":"Collections of related digital information that are geographically referenced."},{"code":235,"name":"datasets","parent":808,"scope":"Digital information in a format suitable for direct input to software that can analyze its meaning in the scientific, engineering, or business context for which the data were collected."},{"code":808,"name":"product types","parent":1,"scope":"General representation of the information in a resource, such as a map or data set."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[{"code":492,"name":"GPS measurement","parent":450,"scope":"Determination of distance and location using instruments receiving signals from the Global Positioning System, a system of satellites for identifying earth locations."},{"code":2083,"name":"LORAN-C navigation","parent":450,"scope":"Hyperbolic radio navigation system used for near-shore waters."},{"code":450,"name":"geolocation measurement","parent":376,"scope":"Methods for establishing a geographic location on the surface of the earth."}]}