Forum Moderators: Robert Charlton & goodroi
The biggest problem for Google is that an image map can easily create a hidden link by just placing the coordinates off the visible image. Yes, this could be checked automatically, but was a bit of a spammer playground and apparently Google chose not to give credit at the time I tested.
Any recent testing would be interesting to hear about - but I would never suggest an image map today if the links were important, certainly not as the only place those links were on the site.
I know second-hand of a test done for rel=nofollow on image map links. The person who did the test (within the past year) found that even with rel=nofollow, the urls were still followed. Since it wasn't my test and I did not access all the data, I cannot 100% confirm the results, but thought I would share this as a data point.