"Johnson, Stuart (ENet)" wrote:
> How do I calculate the distance [outside of MapInfo] between two points expressed in 
>terms of Long,lat?

All the math you need is documented on Ed Williams' Aviation Formulary
page:
http://www.best.com/~williams/avform.html

Look under "Great Circle Navigation Formulae" for "Distance Between
Points."

- Bill Thoen
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GISnet, 1401 Walnut St., Suite C, Boulder, CO  80302
tel: 303-786-9961, fax: 303-443-4856
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