Hi Arri -
You are on the right track, you may want to take a look at the following links, I think they will help point you in the right direction:
Here's some info--it sounds like you want a Background Image:
I didn't follow up on this three years ago, but for completion and any future viewer's sake, the teeth example worked great for learning to how to map coordinates and fill in shapes on a background image. Thanks Matt!
I'm new to Tableau (coming from SPOTFIRE) and I think I know the concept of background images even though the teeth example link doesn't seem to be working anymore. SPOTFIRE has got the same feature but on top of that you can have a background layer based on data rather than on an image. In that way you can choose from which layer you want to derive numeric information and you can have not just two but numerous layers which you can show/hide individually. Specifically I'm interested in plotting electrical design information on a wafer from a semiconductor manufacturing process as a background layer and then additional layers with various measurement values on top of that.
Is there any way to use something other than an image as and additional (data) layer in Tableau?
Is there any way to use more than one background and one data layer in Tableau?