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What are the properties of geoid and ellipsoid in geodectic surveying?
Wiki User
∙ 14y ago
Geoid is the surface of idealized oceans (mean sea level), extended under the continents: * It is equipotential surface: W(x,y,z)=W0 * It is continuous * Closed * And not analytical surface, that for: - It is not used as reference for position determination - It is used only as reference for heights.
Wiki User
∙ 14y ago
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What is the diameter of the earth at the Equator in miles?
The diameter of the earth at the equator is 7,926.41 miles or 12,756.32 kilometers.The diameter of the earth through the poles is 7,901.00 miles or 12,715.43 kilometers.Thus the earth is 25 miles or 59 km wider than it is tall, giving it a slight bulge at the equator.This shape is known as an ellipsoid or more properly, geoid (earth-like), or oblate spheroid (squashed sphere).The radius r as half the diameter d and the circumference c as pi times d are different measures.
The earth is a perfect sphere?
No, the Earth is a bit wider than it is "high". The shape is often called a geoid (Earth-like) or an ellipsoid. The rotation of the Earth causes a slight bulge toward the equator. The circumference of the Earth at the equator (24,901.55) is about 41 miles greater than the circumference through the poles (24,859.82 miles. If you were standing on the moon, looking at the Earth, it would be virtually impossible to see the bulge and the Earth would appear to be a perfect sphere. The mathematical name for the shape of the earth is an 'Oblate spheroid'.
What is the vertical diameter of the earth from the North Pole to the South Pole?
The diameter of the earth through the poles is 7,926.41 miles or 12,756.32 kilometers. The diameter of the earth at the equator is 7,926.41 miles or 12,756.32 kilometers. Thus the earth is 25 miles or 41 km wider than it is tall, giving it a slight bulge at the equator. This shape is known as an ellipsoid or more properly, geoid (earth-like).
How low is Manila below sea level?
-34.141 (meters) Manila Input Coordinates and GPS Height: Latitude = 14.5841666666667° N = 14° 35' 3" N Longitude = 121.008888888889° E = 121° 0'32" E GPS ellipsoidal height = 9 (meters) Geoid height = 43.141 (meters) Orthometric height (height above mean sea level) = -34.141 (meters) (note: orthometric Height = GPS ellipsoidal height - geoid height)
What is the distance around the earth at the equator in miles?
The circumference of the earth at the equator is 24,901.55 miles (40,075.16 kilometers). But, if you measure the earth through the poles the circumference is a bit shorter - 24,859.82 miles (40,008 km). This means the earth is a tad wider than it is tall, giving it a slight bulge at the equator. This shape is known as an ellipsoid or more properly, geoid (earth-like).
What is a ellipsoid?
an ellipsoid is the less formal name for a geoid which is a shape which is like a sphere but is bulgy round the middle
How many km is south America from the equator?
From the Equator to the South Pole is a distance of 10001.96572931272 km or 6214.93336994000 miles or 5400.62944347339 nautical miles. Distance calculated using an online geodesic calculator. It is "accurate to about 15 nanometers [0.000015 mm or 0.00000059 of an inch] (for the WGS84 ellipsoid)". "The accuracy of 15 nanometers" "is for paths up to half-way round the earth." The most accurate methods for calculating geographical distance, ignoring changes in height, are ellipsoidal-surface formulae. "An ellipsoid approximates the surface of the earth much better than a sphere". The WGS84 ellipsoid (ellipsoid of revolution also known as a reference ellipsoid) is a relatively simple mathematical model of the Earth. And the distance is calculated along the surface of the WGS84 ellipsoid. The surface of this ellipsoid approximates the geoid, the Earth's mean sea level. The WGS84 ellipsoid's deviation from the geoid ranges from a maximum of about 85 m (279 feet) below the geoid off the coast of Iceland. However, another source states a maximum of 85.4 m (280 feet) below the geoid east of New Guinea. To a maximum of about 107 m (351 feet) above the geoid south of India.
What is the geoid of the earth?
a geoid is shape or sphere etc.
Shape of earth geoid or spherical?
The Earth is geoid THE EARTH IS SPHERICAL
What is distance around and through the Poles is?
The circumference of the earth at the equator is 40,075.16 kilometers or 24,901.55 miles.The shorter circumference of the earth over the poles is 40,007.86 kilometers or 24,859.73 miles.The difference is 67.3 kilometers or 41.82 miles.This shape is known as an ellipsoid or more properly, a geoid (earth-like).
How many miles around the poles?
The circumference of the earth at the equator is 40,075.16 kilometers or 24,901.55 miles.The shorter circumference of the earth over the poles is 40,007.86 kilometers or 24,859.73 miles.The difference is 67.3 kilometers or 41.82 miles.This shape is known as an ellipsoid or more properly, a geoid (earth-like).
What parameters of the geoid do geodesists measure?
Some of the parameters of the geoid, which are measured by geodesists, are the semi-major axis, and the reciprocal of flattening.
Why is it not helpful to use the term geoid to describe the shape of the earth?
The geoid has an equipotential surface where the force of gravity is perpendicular everywhere. But the earth has an irregular mass distribution and the resultant anomalies, makes the term geoid not a suitable reference.
How large is the world?
The circumference of the earth at the equator is 24,901.55 miles (40,075.16 kilometers).But, if you measure the earth through the poles the circumference is a bit shorter - 24,859.82 miles (40,008 km). This the earth is a tad wider than it is tall, giving it a slight bulge at the equator. This shape is known as an ellipsoid or more properly, geoid (earth-like).
Is the earth 13000 kilometers in diameter?
The diameter of the earth at the equator is 12,756.32 kilometers or 7,926.41 miles. The diameter of the earth through the poles is 12,715.43 kilometers or 7,901.00 miles. Thus the earth is 41 km or 25 miles wider than it is tall, giving it a slight bulge at the equator. This shape is known as an ellipsoid or more properly, geoid (earth-like).
How many miles at the equator is the earth?
The circumference of the earth at the equator is 24,901.55 miles (40,075.16 kilometers). But, if you measure the earth through the poles the circumference is a bit shorter - 24,859.82 miles (40,008 km). This means the earth is a tad wider than it is tall, giving it a slight bulge at the equator. This shape is known as an ellipsoid or more properly, geoid (earth-like).
Is the earth's diameter at the equator 7926.68 milesthrough the poles is it 7899.98?
The diameter of the earth at the equator is 7,926.41 miles or 12,756.32 kilometers. The diameter of the earth through the poles is 7,926.41 miles or 12,756.32 kilometers. Thus the earth is 25 miles or 41 km wider than it is tall, giving it a slight bulge at the equator. This shape is known as an ellipsoid or more properly, geoid (earth-like).
