This has got to be one of the most interesting things I've seen in a while. Fun idea, what could hackers do if we had such a map? Just imagine the new tools we could make.
The newest Microsoft Flight Simulator is using data like this to populate the entire planet. That's a major improvement over the previous version (2006), which procedurally generated anything outside a major city. It's so good that it's being touted as a potential fix to the pilot shortage.
We already have. At least Microsoft did for the newest MFS