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Math

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I am not sure how to convert my Cartesian xyz-coordinates into meters.

x = 0.666
y = 0.666
z = 0.327

a = 6,377,563.396 meters
b = 6,356,256.910 meters

  • Math -

    If you are working with an ellipsoid with a=b>c, where
    a=b=6,377,563.396 (towards the equator)
    c=6,356,256.910 (towards the poles)
    then
    x=acos(u)cos(v)
    y=acos(u)sin(v)
    z=csin(u)
    where -π/2≤ u ≤π/2
    and -π≤ v ≤π

    So from the known values of x,y and z, solve for u and v.
    But I am not sure what you need in metres.

    See:
    http://en.wikipedia.org/wiki/Ellipsoid

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