Live World map with arcs + markers = plugin or handlers ?

[Mecanik]

Hi, I am trying to re-create the following:

• https://threatmap.checkpoint.com/ThreatPortal/livemap.html
• https://www.fireeye.com/cyber-map/threat-map.html

However I cannot understand how these guys do the following:

• Add marker at the start of the arc and
• Draw arc very smooth with shadow
• Add marker at the end of the mark
• Fade out the arc+ marker

Now, I have searched... a lot, and there is no "tutorial" on how to achieve such behaviour. I did get to a point where I can add markers at start + end of the arc and then draw the arc, but the behaviour is ugly and not even close to the above links.

My question is, is there any plugin or even handler/callback that I am not aware of ? Because the guys that created the above maps certainly found a way.

I am not looking in re-creating the style or anything, just the map itself and the nice markers+arcs behaviour.

Please advise... thank you.

[Mecanik]

Really anyone ?