![]() However, the Earth is not evenly round - it is in fact wider around the Equator than it is between the North and South Poles. In this diagram the distances from the centre of the Earth to the Equator and the Geographic ⁄ True North Pole (indicated by ‘a’ and ‘b’) are the same value. This is called a Sphere.įrom an imaginary centre of the Earth, calculations are made from the centre of the Earth to the surface of the Earth. In this calculation the Earth is viewed as being an evenly round ‘ball’. In order to calculate where latitudes and longitudes occur on the surface of the Earth a number of fundamental geometric concepts and practices need to be applied. » a combination of the two (eg Lambert Conformal Conic). » aspects of the projection (eg Conic) or » the person(s) who developed it (eg Mercator) or ![]()
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