Cairo Ill. to Cape Girardeau Mo.

Cairo Ill. To Cape Girardeau Mo.: 1 to 25 miles above Cairo Ill.
Cairo Ill. to Cape Girardeau Mo.: 41 to 61 miles above Cairo Ill.
Cairo Ill. to Cape Girardeau Mo.: 25 to 41 miles above Cairo Ill.

I'm often asked if these are connected to my NASA Human Factors work, if they are some data visualization, or if there is some other explanation for the three pieces. The answer is that I just wanted to make them. They are based on maps of a place that I have a connection to.

Sometimes we just make things that we feel look nice.