Abstract

In the world products made from Satellite Altimetry such as MSS - Mean Sea Surface (mean sea surface height with respect to Reference ellipsoid), MDT - Mean Dynamic Topography (mean sea surface height with respect to geoid), marine gravity field and marine geoid determination etc. have been studying for Oceanography, Marine Meteorology, Marine Hydrology, Geodesy, and Geophysics. In Vietnam in recent several years studies and applications of MSS, MDT for Geodesy and Cartography have initiated by some authors. In this report we tried to use DNSC08MDT for correcting bathymetric observations. Data of DNSC08MDT were officially provided at the time of this study. There are some more advanced models such as DTU10MDT, DTU12MDT (Dương Chí Công và nnk, 2015). Test was done for 5 sheets of 1/50,000 scale seashore surface topographic map in Northern Central Sea (between latitudes of 15° and 20° and from the coast to longitude of 116°) based on transformed DNSC08MDT heights (at local Hon Dau Geoid in Zero-Tide System with systematic deviation compared to tide-gauge). Resulting standard deviation of about ±0.6m satisfies the precision requirements of 1/50,000 scale seashore surface topographic map, firstly for offshore region (more about 20km from the coast).