[Tagging] Feature proposal - RFC - Aviation obstacle light

[Warin]

On 07-Mar-18 04:00 AM, NKA mapper wrote:
> This is a request for comments on a new feature for /aviation obstacle 
> lights <https://en.wikipedia.org/wiki/Aircraft_warning_lights>/:
> https://wiki.openstreetmap.org/wiki/Proposed_features/Aviation_Obstacle_Light 
> <https://wiki.openstreetmap.org/wiki/Proposed_features/Aviation_Obstacle_Light>
>
> I am planning an import of mobile/cell towers in Norway. The dataset 
> is based on a public database for obstacles to aircrafts, containing 
> all vertical structures above a certain height. The dataset also 
> contains information on warning lights on those structures, such as 
> "flashing red light" or "low intensity ICAO type A light". There are 
> similar datasets available in the US and elsewhere. I was unable to 
> find a way to tag the lights and therefore I am proposing the new 
> feature /*airmark=obstacle_light*/.
>
The obstacle is not the light, but the light is used to mark it.
Perhaps air_obstacle=tower/line (thinking of power and communication 
lines as well as towers)
If you want to identify air obstacles, if you only want to identify 
those obstacles that have identifiers then

Some of these have lights, some have no lights. Some lines have soccer 
ball things in bright colours.
For that maybe airmark:light=yes/flashing_red/* airmark:ball=red/*


> I did consider the proposed /light_source=*/ feature, however it was 
> not possible to tag dual day/night warning lights, such as "high 
> intensity flashing white light at daytime/low intensity flashing red 
> light at nighttime". Also, for high light masts (at for example 
> stadiums), bridges, certain towers etc there was anyway a need to tag 
> the main light on the structure and the warning light separately.

conditional tagging could be used ..
light_source:conditional=high intensity flashing white 
light at sunrise-sunset:low intensity flashing red light at sunset-sunrise
https://wiki.openstreetmap.org/wiki/Conditional_restrictions
>
> The proposal is based on how obstacle lights are coded by ICAO, FAA 
> and other national aviation regulators. The tagging structure is built 
> on concepts from the /seamark:light/ tags and it is kept as general as 
> possible in order to be reusable for other kinds of aviation lights 
> such as aerodrome beacons 
> <https://en.wikipedia.org/wiki/Aerodrome_beacon>.
>
> I have no experience with flight simulators, which could be one of the 
> use cases for this tag, so I am particularly interested in comments 
> from the flight simulator and aviation communities.

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