Geodetic Areas

Compute areas of geodesic polygons on the Earth, using the default ellipsoidal model.

Area of a geodesic triangle on the Earth.

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polygon = Polygon[GeoPosition[{{0, 0}, {0, 90}, {90, 0}}]]

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GeoArea[polygon]

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GeoArea[polygon]; % == GeoArea["World"]/8

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Area of a continent.

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polygon = EntityValue[Entity["GeographicRegion", "Africa"], "Polygon"]

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GeoArea[polygon]

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Land area in the world.

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polygon = EntityValue[Entity["GeographicRegion", "World"], "Polygon"];

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GeoArea[polygon]

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Less than 29% of the Earth's surface is land.

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GeoArea[polygon]; %/GeoArea["World"]

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