I'm trying to emulate the earth which is an oblate spheriod - flattened
sphere.

The true earth parameters are

equatorial radius = 6378137
polar radius = 6356752.314

which gives a flattening effect of 1/298.257

The correct result does not occur by scaling the y axis of a sphere to
create the flattening. What seems a likely solution is an ellipse that is
swept around its center.

Any body have any ideas?

DF

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