Hi, I'm omski32 and this is my page about "Final Chaos", a sci-fi-story i am currently writing. Make yourself at home. :)
This is a cthaladanian Stargate. This larger one is used by the military forces and engineers traveling to colonies.
But there are also smaller ones in facilities similar to the earth's railway stations. Each Gate Center has dozens of portals leading to places around the planet and to interstellar colonies. Just like on earth the cthaladanians buy tickets to travel through a gate, but they arrive immediately where they want to go.