Hi,
I am expert ASP.NET and have very good hands on google map integration. As I am worked with GPS tracking system and in that I have shown routes from lat long also google address search and show location between two points, etc. Also worked with custom marker and tooltip.
I can show the demo right away and make sure it's the same as you are looking for.
I am sure, once you will work with me, you will hire me for your all future project because of my quality work.
Please let me know if you need any further information from me.
Thanks.
Regards,
Nagajan