Airports
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About
+Derives from Mile High Club, a detailed GIS compilation of world wide airports that is in the public domain.
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The “location” column is based on the above Airport infrastructure diagram (Source: Wikipedia).
++Location values
+Ordered best to worst
+Terminal – Passenger terminal (not freight, not commercial or private pilot hangers).
+If there is more than one terminal building, the International Terminal, followed by +Terminal 1, or the largest/central building. If multiple terminals are dispersed, the +centroid between them is used (often in a parking lot or round about area). See London +Heathrow for example. The military terminal is not preferred at joint civilian airports.
+Parking – If terminals are spread out, use the centroid between them. Most often a parking lot.
+Ramp – Pavement area outside the passenger terminal area. Used when terminal building is not clear +on airphoto interpretation.
+Runway – Center of the runway. If more than one runway, the centroid. Some of these need +nudging over to the centroid. Can include taxiways if difficult to distinguish between +runway and taxiway on airphoto interpretation.
+Approximate – Could be up to 20 miles away from the actual airport location. +More often it’s within a mile of the actual location. Accuracy is low due to geocoding +based on town name, use of DD.DD° or DD.DDDD° format instead of DD.DDDDDD° for latitude +and longitude values.
+(below) North America.
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