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geoid
Definição1
The equipotential surface in the gravity field of the Earth, which coincides with the undisturbed mean sea level (MSL) extended continuously through the continents.
Fonte1
INTERNATIONAL CIVIL AVIATION ORGANIZATION. Annex 14 to the Convention on International Civil Aviation: aerodromes: volume 1: aerodrome design and operation. 8th ed. Montreal, 2018. (Annex 14).
Nota Adicional1
The geoid is irregular in shape because of local gravitational disturbances (wind tides, salinity, current, etc.) and the direction of gravity is perpendicular to the geoid at every point.
Subárea
Aeronautical Cartography
Related Term
geoid undulation
Français
géoïde