If you want to try top down, you could, instead of flags, try just the 2(or 3) letter codes on the wings. How about a view from the side/front, like this:
I'm gonna have to pass on both ideas. The flags are paramount in recognizing the connections between shuttles & landing sites. Also the side/front view could look cool, if I had the space to do it...
You said the shuttles look "iconish", but let's remember that, all artistic preferences aside, they must be able to function as legend icons and army circles...
What about the spaceship two design by Virgin?
By Virgin?? Virgin is the operating airline, but AFAIK it was designed by Scaled Composites.
Anyway, the SS2 is a commercial design, built for "space tourism". It doesn't really have space travel capacities, you couldn't fly to the moon with one of those... The SS2 can get just far enough into space that the tourists can experience zero G...
The main problem is, that we have no way of knowing for sure what a next generation spaceship - one built for lunar missions even - would look like. Like I said in an earlier post I believe it will follow a blended wing body design, which is aerodynamically efficient. I also believe it will use dual engines - chemical rockets for atmospheric flight and ion thrusters for spaceflight. But who knows whether my predictions will be right. Anyway, if this site is still up 50 years from now, I can always update the map if I happen to be wrong
![Wink ;)](./images/smilies/icon_e_wink.gif)