Algorithm for Latitude-Long

Jacinda M. Barbehenn mountz at
Tue Mar 23 11:28:42 EST 1993

I have a data set of the midpoints of counties based on latitude and
longitude coordinates.  With this data set I want to create a matrix that
lists the distances between counties.  However, to use latitude and longitude
data, I need an algorithm that will correct for the longitude distances.
Does anyone know of an algorithm that can do this?

-jacinda barbehenn
 mountz at

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