[tombh]

Hey Marc!

I'm afraid I don't have a good answer. I'm sure with future runs will get closer to you and udeuschle.de

I thought of you when we saw Colombia appear so high up in the list, I remembered that's something you'd found too.

[neom]

Is this a hobby lots of people have or something? And if so, what is it called? Cartography? I'm surprised to see folks debating this.

[mrb]

I suppose our hobby is related to the hobby of ground-to-ground long-distance observation. Except we don't perform the actual observation, just the math of where it is theoretically feasible :-) In my case, years ago, I did exactly the same as Tom and Ryan: I algorithmically searched for the longest sightline. It was a weekend project just to satisfy my curiosity. Then last year, Tom and I kinda connected informally over this hobby.

[neom]

Fascinating, I'd never even thought of the longest sightline till now! Well cheers to you and Tom and Ryan, a thoughtful and smart bunch!! :)