The Earth's volume exceeds that of the oblate spheroid due to the land volume above sea level, which is estimated to be 3.755×107km3, based on the global mean elevation of ...The Earth's volume exceeds that of the oblate spheroid due to the land volume above sea level, which is estimated to be 3.755×107km3, based on the global mean elevation of 231.3 meters.Note that one fourth of the polar circumference is less the 2km more than the pole-to-equator dimension used to define the original meter.