VFR chart legend - explained

Say what you will about governmental agencies in general, when it comes to the FAA I'm impressed. Not only is the FAA putting out a ton of free information and tools for its constituency, but the quality of the materials is fantastic. Here is a VFR chart legend I just ran across. This document doesn't just provide the legend itself (which is printed on every chart anyway), but goes into some detailed explanations of the legend elements.

Click here to view the PDF document or visit the FAA Charting Office web site.