Wow. What an awesome map. You can even see major highways in the western US.

I recently moved from the western US to the east. The public/opens lands are what I miss the most. I don't think many people out east even realize what public land is, how much there is, and how great it is. But this map really displays it.

Side note: What's up with Alberta? Same with northwestern North Dakota? I'm guess this is mining and/or oil operations?