Revision history for Perl extension Geo::PostalCode.

0.06  09/24/2003
	Scott Gifford contribed the following changes
 * query_postal_codes contained some errors:

 + It assumed that the space between single degrees of latitude and
 longitude are the same. This only holds true at the equator;
 otherwise the distance between two degrees longitude is:

 cos($lat*PI/180)*LON_MILEAGE_CONSTANT

 This formula is probably well-known, but I got it from:

 http://www.malaysiagis.com/related_technologies/mapping/basics1b.cfm

 This corrected a bug where the cells searched would often miss
 areas that were a ways away from the site.

 + There were bugs when the search radius crossed the poles, the
 prime meridian, or the -180/180 longitude line. All of these
 are now fixed in various ways (see the code).
 
 + postal_code attribute was sometimes not returned correctly for
 some results.

 * query_postal_codes now searches for ZIP codes whose distances are
 inside or exactly at the search radius, instead of strictly
 inside (<= instead of <).

 * The search algorithm has gotten complex, so I re-implemented
 nearby_postal_codes in terms of query_postal_codes. Benchmarking
 shows that this doesn't introduce much of a performance hit, and
 it makes the code much more maintainable.

 * A bug in test_near when the $cell and $center were on opposite
 sides of the -180/180 longitude line caused a cell to be missed.

 * Modified load.pl to take an optional parameter with a filename to
 build from.

 * Corrected 01_basic.t with new results based on modified code.

 * Added regression test 02_polevault for near poles, prime meridian,
 and 180/-180 latitude line, including test data edgetest.data

0.05  08/19/2002
	- Fix for load.pl on FreeBSD and Mac OS X (Andrew Brosnan)
	- more POD fixes

0.04  07/18/2002
	- POD fixes (Paul Kooros)
	- Error handling for load.pl (Paul Kooros)

0.03  05/17/2002
	- Work around for Perl/Berkeley DB bug in load.pl
	  (Kyle Dawkins)
	- Improved accurancy of PI

0.02  12/23/2001
	- Documentation fixes

0.01  10/27/2001
	- original version; created by h2xs 1.19
