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I plan an app which will plot aircraft, maybe on an OSM Leaflet map, maybe on Google maps. I may implement it in Flutter/Dart AngularJs, or even plain old JS.

I don't have a strong preference, and can code any/all of those, so will use whatever fits in with any good recommendation that I get here.

Is there any gratis library which will let me overlay a classic green & black radar display over a map on which I have placed icons. E.g 'plane icons on a map of the airspace around Frankfurt airport.

A bonus would be if the user can zoom the map.

Also nice, if there is a "sweep hand" rotating every few seconds.

enter image description here


[Update] I never did find a library, but I managed it by adapting the code found at

 https://tkardi.ee/writeup/post/2019/04/27/building-a-totally-useless-map/
 https://tkardi.ee/writeup/post/2019/04/30/building-a-totally-useless-map-ii/

enter image description here

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