dktc is wrong.
Full world == every airport in-game, everywhere.
Large world = all airports with GREATER THEN but NOT EQUAL TO 100 gates. there's one or two others. all the scales of (large, small, medium... etc) are based on gate numbers. the smaller the world size, the more gates are required for an airport to make it into the world.
continent names == all airports in continent,
country == all airports within country.
what qualifies a country as in the loop for automatic world generate? 60+ airports.
[Eventually] what qualifies a country for a private world? 50+ airports.
WHAT if an airport is added after a world starts? Simple. it's automatically put into the game at the next hour (provided it is "supposed" to be in that world map).
