The Collaborative International Dictionary of English v.0.48:

Geodetics \Ge`o*det"ics\, n.
   Same as Geodesy.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "geodetics":
   altimetry, bathymetry, biometrics, biometry, cadastration,
   cartography, chorography, cosmical geology, craniometry,
   dynamic geology, geodesy, geodynamics, geognosy, geographics,
   geography, geological chemistry, geological engineering, geology,
   geomorphogeny, geomorphology, geophysics, geoscopy,
   geotectonic geology, goniometry, historical geology, hydrogeology,
   hypsography, hypsometry, mensuration, metrology, mineralogy,
   mining geology, oceanography, paleontological geology, pedology,
   physical geography, physical geology, physiographic geology,
   physiography, planimetry, psychometrics, psychometry,
   soil mechanics, soil science, stereometry, stratigraphic geology,
   stratigraphy, surveying, topography