First of all, congratulations on a great map engine!
We are currently trying to "draw" images (ellipse, line, polygons etc) "on" the map canvas. Now this is easy enough using the mapmarkers, but what we ideally require is to have the drawing shape at runtime as the mouse is being dragged.
(Please have a look at this sample
http://www.timfanelli.com/item/177, should explain it better)
We are making use of the WPF platform in this instance.
Has this been done?
I have toyed with the idea of having a transparent canvas overlayed on the gmap canvas, which will catch and handle the relevant mouse events - but introducing transparency brings together a new set of issues altogether.
Any ideas or guidelines in this will be greatly appreciated!