National Ocean Survey NOAA Technical Publications National Ocean SurveyINational Geodetic Survey subseries

the basic National horizontal and vertical networks of geodetic control and provides governmentwide leadership in the improvement of geodetic surveying methods and instrumentation, coordinates operations to assure network development, and provides specifications and criteria for survey operations by Federal, State, and other agencies. NGS engages in research and development for the improvement of knowledge of the figure of the Earth and its gravity field, and has the responsibility to procure geodetic data from all sources, process these data, and make them generally available to users through a central data base. NOAA Technical Memorandums and some special NOAA publications are sold by the National Technical In-fornation Service (NTIS) in paper copy and microfiche. Orders should be directed to NTIS, 5285 Por