Global Navigation Satellite System (GNSS)-based survey technology improves the accuracy and usability of location information by enabling the rapid updating of different information and the efficient use of integration through an ellipsoid. The global marine sector also uses the GNSS to produce rapid and accurate hydrographic surveys and to expand investment and introduce integrated use, such as the S-10X electronic chart. In this study, the conversion of a vertical-based information provision system through a tidal benchmark that is currently implemented to an area-based information provision system was examined. We analyzed a range that allows area modeling using a tidal benchmark by calculating the height from an ellipsoid to the mean sea level (MSL) using the tidal benchmark. An experiment to determine the optimal spatial interpolation was conducted by comparing and analyzing the external verification and performance results. The results of this study are expected to be actively utilized in the manufacture of a continuous marine vertical datum system based on WGS-84.