[SGVLUG] Distance between two locations

[Peter Fogg]

The site that I am developing requires the ability to calculate the 
distance between to locations. Brief Web surfing concluded in two 
options - the longitude and latitude of the two locations must 
determined external to the site and manually entered into the db 
associated with the site and the distance calculated in the application 
layer or use some third party service to do the calculation.

Anyone have experience with solutions to this requirement or 
suggestions?

Peter -