View all US Airports on Google Earth via KML

I finally took the time to write the script to take the raw National Flight Data Center APT.TXT file and write it straight to a Google Earth and Maps-compliant KML file. It's pretty basic XML, with a little math to convert the FAA's all-seconds format into decimal coordinates.

A word of warning: DO NOT USE FOR NAVIGATION. This is unverified data from the FAA, and my math is often accurate to about a factor of ten. Also, there are 13,569 airports, which means there are 13,569 points in this file. It's enough to max out the processor running Google Earth on your computer. However, when you zoom in to a single state, it will speed up because most points are off-screen. I filtered out non-airport landing facilities: BALLOONPORT, SEAPLANE BASE, GLIDERPORT, HELIPORT, STOLPORT, ULTRALIGHT, so you will find none of those in this file. (The FAA likes things in ALL CAPS.)

The pop-up description of each data point includes the airport code, airport name, UNICOM frequencies, CTAF, and pulic or private. Download the US Airports KML file here.

Here's a screenshot of Google Earth with the KML loaded: