Missing results due to geo proximity formula (store locator)

Question

OK - I\'ve been wrestling with this for about 3 months on and off and since I\'ve exhausted every geo proximity formula out there that I\'ve come across and I\'m no closer to ge

Answer 1

You can try my class at http://www.phpclasses.org/package/6202-PHP-Generate-points-of-an-Hilbert-curve.html. It uses the harvesine formula and a hilbert curve to compute a quadkey. You can then search the quadkey from left to right. Every position of the key is a point on the monster curve. A better explanation of the curve can be found at Nick's spatial index quadtree hilbert curve blog. It's like using the spatial index extension from mysql but you have more control. You can use a z curve or moore curve or you can change the look.