John D. Coryat - President of USNaviguide LLC.
John Coryat and USNaviguide LLC has been a provider of quality custom software services to customers the world
over for more than 18 years. We provide a broad range of custom programming and design
services from custom and standardized polygon databases to web sites and hosting services.
This page lists some of the significant accomplishments for John Coryat Systems: Significant Accomplishments of John Coryat Systems
USNaviguide LLC currently is specializing in cartographic web site programming, utilizing Perl, SQL and Apache on Linux based platforms.
Our latest product offering:
Mapping programs:
USPS Zip Code Boundary Map
2000 ZCTA Zip Code Boundary Map - Merges Zip Codes into one Boundary
Zip Codes within a Radius
Town/City Boundary Map
County Boundary Map
Zip Code Boundary Maps for States, Counties and Places
All these maps work essentially the same. Either click on a point inside the US or key a zip code and the program will draw the border for the $
Some points will result in no border being drawn due to the point being outside of the polygons in our database.
Tiger/Line 2006FE Based Reverse Geocoder: Translate a latitude and longitude coordinate into $
Geocoder: Translate an address into latitude and longitude coordinates.
NOAA Weather Radar Android Application
Site Links:
Maps.Huge.Info
USNaviguide LLC
Examples Page
Sales Information for our site
Other Interesting and Useful stuff:
PostgreSQL Statements of Interest
Author: John D. Coryat 
Last update: 06/2010
Boundary Maps with Google Maps API
TIZY - Free Multiple Choice Word Game
TIZY PLANES - Free Multiple Choice Aircraft Identification Game
Judy, The Cute Dog (and Friends)
Introduction to Corporations
RoHS and WEEE Compliance
This site can also be reached at: www.coryat.us
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