My cartographic file parser is working the way I want it to now. There are four total files that describe states and counties for all 50 states, and two files for each state that describe cities and two files for each state that describe zip codes. I've parsed all of the state and county data, and have parsed 13 states worth of cities and zip codes. Those 14 states include Minnesota, Wisconsin, Michigan, North Dakota, South Dakota, Iowa, Montana, Idaho, Washington, Illinois, Missouri, Indiana, Ohio, and Nebraska.
Some interesting stats so far:
21,018 unique boundaries have been...