Thanks. Just before I pushed it out to my site, I worked out the real values based on commercial flights and was horrified by how far out the altitudes were. I

Thanks. Just before I pushed it out to my site, I worked out the real values based on commercial flights and was horrified by how far out the altitudes were. I tried it with correct values and it just didn't look as good so I'll put it down to creative license :) Great idea for a clock and sunlight map - I'll add those to the list for v2.