Yes it is possible.
Online Maps has a built-in Drawing API, but does not force you to use it.
You can use any way to draw shapes, that is suitable for your purposes.

I Stumbled on this asset when trying to figure out a potential map related problem and hope it will solve said problem.

Basically im currently developing an aviation related training app using Unity and need a map system like the one you have developed on the asset store, but first I want to make sure your asset can fulfil my needs.

I need to recreate a UK aeronautical chart. This would involve drawing shapes probably using Rage spline or Vectrosity on the map to represent certain airspace parameters and data.

Obviously the map would cover quite a large area and need to be tiled.

Can you confirm this is possible?

Kind Regards,
John