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User Name Thread Name Subject Posted
Black belt caterpillar wrestler BS: Map Projections (33) RE: BS: Map Projections 18 Mar 18


The earth is not an exact sphere which makes more problems for map makers when in pursuit of the best fit for their maps. There are a series of different slightly distorted spherical shapes (spheroids) that are used for different parts of the world. They have strange names like Airey 1881, Indernational 1924 and WGS 84.
I found out about them when I used to work at the Hydrographic Office. The problems come when you try to fit two maps edge to edge and they have been based on different spheroids!

Robin


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