geo·det·ic /ˌʤiəˈdɛtɪk/
 (a.)測地學的;測量的


 Ge·o·det·ic Ge·o·det·ic·al a. Of or pertaining to geodesy; obtained or determined by the operations of geodesy; engaged in geodesy; geodesic; as, geodetic surveying; geodetic observers.
 Geodetic line or Geodetic curve, the shortest line that can be drawn between two points on the elipsoidal surface of the earth; a curve drawn on any given surface so that the osculating plane of the curve at every point shall contain the normal to the surface; the minimum line that can be drawn on any surface between any two points.

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 geodetic
      adj : of or relating to or determined by geodesy [syn: geodesic,
             geodesical]