I have a database containing addresses with longitude/latitude calculated using Geo::Coder::US. I'd like to be able to run SQL queries based on points within a certain distance of another point. In other words, I provide a lat/long and a distance in miles, the database gives me a list of results within that area.
The problem I've run into is converting a distance in miles to something to use as a distance in the longitude/latitude scheme of things. Does anyone know how to do this?