I want to add automatic area highlighting to image maps on my webpage. I\'ve found the mapper.js library to be very useful in achieving this, however creating the x,y plots arou
Gimp offers a plugin/filter called Gimp image map that has a nice interface to help create an image map. I think it will provide the functionality that you are looking for. Select Filters -> Web -> Image Map... to bring up the dialog

Once you have the Image Map dialog open you can create polygon areas to your heart's delight:

You are able to create and customize areas as you like modifying the link, alt text, frames, the polygon itself or even setup javascript events.

After you are done, save it and you'll be able to use the fragment that you just saved in your html