WPF line, polyline fast rendering

Question

Hi,

I have a problem and found something about it here: http://stackoverflow.com/questions/1150060/how-to-draw-line-of-ten-thousands-of-points-with-wpf-within-0-5-second

We need something like this, but a little more. We have to draw a route from gps coordinates (around 20.000 coordintes) on a map. (The map rendering is fast. Basically its an image on a canvas.)

The problem is: a tooltip have to be shown with details (timestamp, coordinates, speed...etc), lines have click events...etc. The map can be zoomed and scrolled. And many more objects are on the map (POI, selections...)

Any idea?

Thanks, Mart