I've been asked to program a feature into our website that allows a user to put in their zip code and then find a list of institutions of higher learning (which would be in our database) that is within a given radius that the user specifies.

What data do I need to do this? What software do I need to do this? Will any of the data need to be purchased? Can mappoint do this? How do I get started and what are the approximate costs.

I appreciate your help.