Improve presentation of flights arounds airports (arriving, departing, on ground)

[marvk]

Currently, flights on the ground are either displayed or not displayed. If they aren't displayed, the information that there are flights at an airports isn't available on the map.

One option to improve this condition would be to add indicators similar to VAT-Spy (#67).

[matthboers]

The arriving/departing arrows in VatSpy are a great option and definitely worth considering.

The current system of displaying all ground traffic is also used by Volanta and SimAware. However, the biggest plus of both programs mentioned it that they also show details about the airport. Details like taxiways, terminal buildings and runways. I'm unsure what the complexity of implementing this feature is, but I can image it being quite the challenge. It is also worth mentioning that both these programs only show labels on mouseover, which signifiantly reduces visual clutter. To combat this visual clutter, it could be an option to add a "minimum zoom level" to show ground traffic labels.

I can image a mix of the two features being the best. Up to certain zoom level it would show the Dep/Arr arrows, and zooming in far enough would show the ground traffic. With both features being toggleable, for good measure.

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Another idea to separate the ground traffic from the air traffic, would be to add alternative colour settings to ground traffic. Where their label and outline are coloured differently from airborne traffic. Possibly with a toggle to hide labels of ground traffic.