Accession Number : AD0837115

Title :   THE USE OF GEOPOTENTIAL HEIGHTS FOR GREAT LAKES VERTICAL DATUM,

Corporate Author : UNITED STATES LAKE SURVEY DETROIT MI

Personal Author(s) : Feldscher, Carl B. ; Berry, Ralph Moore

Report Date : 1968

Pagination or Media Count : 11

Abstract : The study deals with a subject that the average civil engineer, without any geodetic orientation, would think of as 'levels'. The actual shape of the Mean Sea Level surface, however, is not readily amenable to description by a simple mathematical expression. If the waves, tides, currents, etc., be 'averaged out' and the sea level surface considered to be the quiet, undisturbed, smooth surface of the sea, a liquid in equilibrium, it will be immediately obvious that this surface will be everywhere normal to the direction of gravity. This is indeed the definition of the Mean Sea Level surface even when it is extended underneath the surface of the continents. (Author)

Descriptors :   (*GEODESICS, GREAT LAKES), GRAVITY, HYDROGRAPHIC SURVEYING, NUMERICAL INTEGRATION, NAVIGATION CHARTS, ELLIPSOIDS, MATHEMATICAL MODELS, SURFACE PROPERTIES.

Subject Categories : Geodesy

Distribution Statement : APPROVED FOR PUBLIC RELEASE