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How to calculate large distance taking the Earth curvature into consideration

Question asked by Ming_zhang on Oct 16, 2012
Latest reply on Oct 17, 2012 by ad_giles@hotmail.com
I want to calculate distance of two points that is far away and at different place on Earth, for example flight-distance between major cities around the world.  It will be desirable to take the Earth curvature into the calculation.  Dose the "Distance or Near" function in ArcGIS do this?  I don't believe so.  How to do this and is there a script exist to do this?

Thanks in advance,

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