The distant ancient civilization was indeed rather advanced. They could make good use of the energy resources of the permanent star and modify the planets completely.
As a result of the planetary modification, the Stargate Base had three famous canyons on the crust of the planet, looking like three scars as well as three flower petals.
The New Era Institute and Shou'er City were located near one of the canyons, which was also the only passage leading to the underground lab.
There was a canyon south of the equator, where the number of residents was lower and there were fewer cities. Most departments of the planetary fleets were stationed there.
The large ship docks for mooring battleships and the maintenance of the ships were located on the second level below the crust, which was called the Special Second District.