| AG_EQUIP |                             string
 |                                         Agricultural Equipment |         
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                            | ANTENNA |                             string
 |                                         Antenna. |         
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                            | ARCH |                             string
 |                                         Arch. |         
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                            | BRIDGE |                             string
 |                                         Bridge. |         
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                            | BUILDING |                             string
 |                                         Building. |         
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                            | CABLE_CAR |                             string
 |                                         Cable car. |         
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                            | CATENARY |                             string
 |                                         Catenary (wire). |         
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                            | COMPRESSED_AIR_SYSTEM |                             string
 |                                         AirMAT: The components of a compressed air system. |         
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                            | CONTROL_MONITORING_SYSTEM |                             string
 |                                         AirMAT: The components of an electronic monitoring and control system (EMCS) including cables, devices, and so on. |         
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                            | CONTROL_TOWER |                             string
 |                                         Control tower. |         
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                            | COOLING_TOWER |                             string
 |                                         Cooling tower. |         
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                            | CRANE |                             string
 |                                         Crane. |         
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                            | DAM |                             string
 |                                         Dam. |         
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                            | DOME |                             string
 |                                         Dome. |         
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                            | ELECTRICAL_EXIT_LIGHT |                             string
 |                                         AirMAT: The components of an electrical exterior lighting system including cables, switches, devices, transformers, and so on.  Does not include field, navaid, or approach lighting |         
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                            | ELECTRICAL_SYSTEM |                             string
 |                                         AirMAT: The components of an electrical distribution system including cables, switches, devices, motors, transformers, and so on. |         
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                            | ELEVATOR |                             string
 |                                         Elevator. |         
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                            | FENCE |                             string
 |                                         Fence. |         
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                            | FUEL_SYSTEM |                             string
 |                                         AirMAT: The components of a fuel distribution system consisting of pipes, fittings, fixtures, pumps, tanks, and so on |         
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                            | GATE |                             string
 |                                         Area of a fence which may be opened for passage through the fence or closed to prevent passage through the fence. |         
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                            | GENERAL_UTILITY |                             string
 |                                         AirMAT: The components of  utility system which are universal in use and purpose and do not belong to a specific utility |         
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                            | GRAIN_ELEVATOR |                             string
 |                                         Grain elevator. |         
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                            | HEAT_COOL_SYSTEM |                             string
 |                                         AirMAT: The components of a heating and cooling distribution system consisting of pipes, fittings, fixtures, and so on. |         
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                            | INDUSTRIAL_SYSTEM |                             string
 |                                         AirMAT: The components of an industrial waste collection system including pipes, fittings, fixtures, tanks, lagoons, and so on. |         
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                            | LIGHTHOUSE |                             string
 |                                         Lighthouse. |         
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                            | MONUMENT |                             string
 |                                         Monument. |         
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                            | NATURAL_GAS_SYSTEM |                             string
 |                                         AirMAT: The components of a natural gas distribution system consisting of pipes, fittings, fixtures, and so on. |         
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                            | NATURAL_HIGHPOINT |                             string
 |                                         Natural high point. |         
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                            | NAVAID |                             string
 |                                         Navaid (navigation aid) |         
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                            | NUCLEAR_REACTOR |                             string
 |                                         Nuclear reactor. |         
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                            | POLE |                             string
 |                                         Pole. |         
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                            | POWER_PLANT |                             string
 |                                         Power plant. |         
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                            | REFINERY |                             string
 |                                         Refinery. |         
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                            | RIG |                             string
 |                                         Rig (oil rig). |         
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                            | SALTWATER_SYSTEM |                             string
 |                                         AirMAT: The components of a salt water collection system. |         
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                            | SIGN |                             string
 |                                         Sign. |         
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                            | SPIRE |                             string
 |                                         Spire (steeple). |         
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                            | STACK |                             string
 |                                         Stack (smoke, industrial). |         
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                            | STADIUM |                             string
 |                                         Stadium. |         
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                            | STORM_SYSTEM |                             string
 |                                         AirMAT: The components of a storm drainage collection system including pipes, fittings, fixtures, and so on). |         
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                            | TANK |                             string
 |                                         tank. |         
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                            | TETHERED_BALLOON |                             string
 |                                         Tethered balloon. |         
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                            | TOWER |                             string
 |                                         Tower. |         
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                            | TRAMWAY |                             string
 |                                         Tramway. |         
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                            | TRANSMISSION_LINE |                             string
 |                                         Transmission Line. |         
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                            | TREE |                             string
 |                                         Tree. |         
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                            | URBAN |                             string
 |                                         Urban Area |         
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                            | VEGETATION |                             string
 |                                         Vegetation. |         
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                            | WALL |                             string
 |                                         Wall. |         
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                            | WASTEWATER_SYSTEM |                             string
 |                                         AirMAT: The components of a wastewater collection system including pipes, fittings, fixtures, treatment plants, collection locations, and so forth. |         
                              | 
                            
        
                            | WATER_SYSTEM |                             string
 |                                         AirMAT: The components of a water system including pipes, fittings, fixtures, treatment plants, and so on. |         
                              | 
                            
        
                            | WATER_TOWER |                             string
 |                                         Water tower. |         
                              | 
                            
        
                            | WINDMILL |                             string
 |                                         Windmill. |         
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                            | WINDMILL_FARMS |                             string
 |                                         Windmill Farm. |         
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                            | OTHER |                             string
 |                                         Other |         
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