About Zipdy
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Zipdy is a program for calculating the distance between two zip
codes and finding all the records in a RDBMS with a zip code
with x miles of another zip code. Currently, RDBMS support
exists for postgreSQL. Additional future support for other
databases will be added in future releases of zipdy.
Zipdy is public domain software. Zipdy was written in C but is
also available in PHP and perl. It runs with data from the US
Census Gazetteer program. The data is from the 2000 census.
The distance calculations are made by doing a great circle
calculation on longitude and latitude points provided by
the census data. The result is returned in standard miles.
Full information about the installation of Zipdy can be
found in the INSTALL file in this directory.
Files
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zipdy-x.x.x Zipdy Distribution Archive
AUTHORS Contributors to the Zipdy Project
BUGS Known Bugs and problems with Zipdy
COPYING Statement of Public Domain Status
NEWS News
README This file
TODO Work to be done on Zipdy
INSTALL Instructions on how to install Zipdy
doc/ Additional Documentation
faq.html Frequently Asked Questions
cgi/
zipdy.c C version of Zipdy CGI Script
zipdy.php PHP version of Zipdy CGI Script
zipdy.pl Perl version of Zipdy CGI Script
optional/
gdbm_create.c Program to convert Census Data
file To GDBM database
zipdy_force.c Program to generate data files
from GDBM database
zipdy_test.c Program to test GIS calcs on your
system
proximity/
convert_to_sql.pl Perl script to convert data
files to sql script
zipdy.sql Zipdy db schema
Patches
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I ask that you surrender copyright on your patches to Zipdy
over to the maintainer. If you do not surrender copyright,
please state so explicitly in your submission email. I will
most likely attempt to reimplement your patch if you do not
surrender your copyright.