plotting location points over image file

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VB

Hi there, looking for some good suggestions as to a nice and easy way to present some location data (eg lat and long) over the top of an image file.

Essentially my application receives data (via usb port) from a remote vehicle(aka racing kart), within this data is the lat and long from the GPS in the kart.

I want to be able to show the last few locations (say last 5 locations) as dots (getting progressively smaller from most recent to least recent) over the top of an image file. The image file is a static map (eg race track).

I know I could load the image file as a background to a form (or other control). And I can create a array to hold the set of location points. Just haven't worked out a reasonable way to show those dots over the image file and have it hold the right aspect ratio.

Probably worth saying upfront; The application, when running will not have internet access, so overlaying on google maps (or like) is not an option. This needs to be standalone solution.

So, any useful suggestions and or examples even references to other similar work much appreciated.