INSPIRE directive Annex 1, chapter 7, paragraph 7.4 "Air transport network"

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Data sets in AIXM 5.1 format:
•    Aerodromes;
•    En-Routes;
•    Airspace;
•    Navaid Equipment;
•    Standard Instrumental Arrival;
•    Runways and Take-Off Areas;
•    Instrument Approach Procedure;
•    Standard Instrument Departure;