Ke, H.; Wang, A.; Lei, J.; Wu, J.; Wang, Z., and Zhang, S., 2020. Establishment of seamless chart datum and vertical datum transformation for hydrography with a combining geoid, sea surface topography, and ocean tide model in Prydz Bay, Antarctica. In: Hu, C. and Cai, M. (eds.), Geo-informatics and Oceanography. Journal of Coastal Research, Special Issue No. 105, pp. 204–209. Coconut Creek (Florida), ISSN 0749-0208.

The establishment of a seamless chart datum and a transformation model with other vertical datums are the key to unifying sea–land measurement achievements. Since construction of the Chinese Antarctic Zhongshan scientific research station, nearby Prydz Bay has become a significant investigation area. However, it is still difficult to unify bathymetric measurements in Prydz Bay and topographic measurements in the station to the same vertical datum. In response to this problem, the Earth Gravitational Model 2008 geoid model, the Indian Ocean 2010 tide model, and sea surface topography model product of a satellite altimeter were used to establish a seamless chart datum and a transformation model between the WGS84 ellipsoidal reference and the chart datum through the fusion method, with a scope of –69°48′ to –66°24′ S and 70°00′ to 82°00′ E. The accuracy of the transformation model had been evaluated to be 10.7 cm on the basis of the error of each model and the law of error propagation. Meanwhile, the difference between the transformation model estimation and the field-measured value derived from a GPS tide was 8.8 cm. To some extent, this comparison result can reflect the accuracy of the model, but more field-measured data still needed to verify it.