there are image mapping online and download tools you use to do the image mapping outside of Moodle then just bring in the code - search for image mapping tools
- Add your image to moodle
- use the tool to load your image and follow instructions to add hotspots and destination links etc - copy the code produced
- Go back to Moodle and toggle into HTML - find the <img='your image name' line where your image was added
- copy the code from step 2
- replace the src="filelocation" bit in the step 4 code with the src=filelocation" bit from the original image you added in step 2
- toggle Edit HTML off - you should have your original image followed by the version with hotspot navigation - give a test and delete the original image with no hotspots when all working OK
Hope it helps