best way to determine proximity to location with a list of latlng with Google Map API <p>I'm under a 2-day crunch deadline (my own undoing, I know), and I need to implement a function in Wordpress that searches through a bunch of posts with custom content containing locations in a known field in wp_postmeta, (NOT geocoded) and shows a list of them based on proximity (i.e., within 20 miles) to a specific geocode. </p> <p>I have no problem with the WP query - I'm just a little new to Google Map API, and the docs aren't terribly straightforward with regards to geocoding, which I ASSUME I have to do to determine proximity. </p> <p>Additionally, I assume I'll just have to iterate through the list of each post and determine one at a time if they meet the proximity requirement. </p> <p>I'm not asking for someone to do this for me, unless you w3ant to be paid to do it for me - I just need to be pointed in the right direction quickly. I can;t find ANYONE who knows how to do this - and I have some budget for it...</p>