11. These deflection values were integrated into astrogeodetic geoid charts referred to these national datums. 12. The geoid is essentially the figure of the Earth abstracted from its topographic features. 13. His goal was to establish the exact shape of the geoid and the Earth. 14. The difference between the ocean surface and the actual geoid gives ocean surface topography. 15. The Bessel ellipsoid fits especially well to the geoid curvature of Europe and Eurasia. 16. The uncertainty is due to the geoid . 17. The geometrical separation between the geoid and the reference ellipsoid is called the geoidal undulation. 18. Geoid uncertainty casts doubt upon the accuracy claimed by both the 1999 and 2005 surveys.19. The geopotential surface called the geoid is one definition of the shape of the Earth. 20. The permanent deviation between the geoid and mean sea level is called ocean surface topography.
