Building: Barn/machinery shed
Other
Building: City hall
Government and Institutional
Building: Dome
Building: Electric power station
Building: Fire station
Building: Grain elevator
Resource and Industrial
Building: Religious building
Parabolic antenna: Radar
Parabolic antenna: Radio telescope
Ruins: Generic/unknown
Culture
Silo: Generic/unknown
Tower: Clearance
Tower: Communication
Tower: Control
Tower: Lookout
Building: Other