A handout from Philip Greenspun; revised January 2017
The Web sites that you saw today are all linked from http://philip.greenspun.com/teaching/aeronautical-charts/slides
Airspace around Lincoln, VFR (visual flight rules)
The same area, but for flying in the clouds (IFR)
Juneau Alaska (note 6,000' mountains nearby)
Boston Helicopter Chart section
Philip Greenspun has more than 4500 hours of total flying time accumulated since 2001. He has Airline Transport Pilot and Flight Instructor certificates for both airplanes and helicopters. He has worked as a regional jet pilot for Delta Airlines and now teaches helicopter and airplane students at East Coast Aero Club.
Greenspun has a Ph.D. in Electrical Engineering and Computer Science from the Massachusetts Institute of Technology. His web site is philip.greenspun.com.