[thelist] Zip/Postal Code Radius
Joshua Olson
joshua at waetech.com
Thu Dec 19 14:32:00 CST 2002
----- Original Message -----
From: "Howard Cheng" <howcheng at ix.netcom.com>
Sent: Thursday, December 19, 2002 3:18 PM
> The Great Circle method isn't that hard. Here's the formula (this is in C#
> but it can be easily ported to any other language):
While not REALLY being hard (like you explained), I can't imagine that the
query you provided runs very quickly due to all the math involved in the
conditional. :-) But, you have done a great service by actually providing
the query and the equation... thank you. What sort of speed results did you
get with it?
-joshua
More information about the thelist
mailing list