All maps and data on this page are in the public domain. You may use them any way you like, including modifying the content, reproduction, and selling for profit. Consider these items as yours.
By downloading and using the maps and data contained herein, you agree that the author (Tom Patterson) is not legally responsible for any errors that they may contain. You are solely responsible for all problems that may arise from reuse of the maps and data, and their redistribution to third parties. Tom Patterson does not endorse the individuals or organizations using maps downloaded from this page, nor does he endorse their positions on various issues.
Please do not contact me asking permission to use or publish the maps. You have my blanket permission to do so right here.
If you do something cool with my maps and data, feel free to drop me a line. I'd enjoy seeing your work.