Yes definitely.
Not a custom html page for your main APP’s form.
Just for the image map.
Just like this:
https://anvil.works/build#clone:DDFKXOTPQNNKFRVH=JG2FCCK4GG25CHGJKG6CL2WA
This way you can easily build each map as a custom component and then use it in the visual designer just like any other component.
Now that I think at it, this approach could be generalised a little so to provide a “general” ImageMap component with:
-src: image base64 or url
-maps: a Json with the maps
and the click event returning which map was clicked.
Such component could be much more useful and could be included in Anvil’s StdLib.
Working on it. 
BR