Assertion: ellipsoid's surface | /r/HasProperty | irregular
Facets:
value: highly
type: DEGREE
Source sentences:
text: As a result of the uneven distribution of the Earth's mass, the geoidal surface is irregular and, since the ellipsoid is a regular surface, the separations between the two, referred to as geoid undulations, geoid heights, or geoid separations, will be irregular as well.
text: Because the surface is highly irregular, however, there are different local geoids that are used to get the most accurate mathematical model possible for use in measuring vertical distances.