Map of the Day

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  • conwaycaptain

    A GREAT CIRCLE is any circle on the surface of a sphere whose plane passes through the centre of that sphere!!!! Drummed into me at Conway. However the earth is an oblate spheroid but it still works.

    • Morse

      … which is the shortest distance between two points on a sphere

  • Mike K

    Any country in the world could therefore be reached travelling along a great circle using Auckland as the point of origin and the centre of the earth. If however, we’re using the oblate spheroid model, then only countries on the 174E / 006W line of longitude would be reachable