Have you checked out this excellent resource on Dual-Axis Mapping? There are a number of ideas there by Sarah Battersby which may resolve your particular situation: Dual Axis Mapping - Many Ways Hope it helps! Thx, Don
When I have done this in the past, I go to Mapbox and put all the hospitals on the map with custom icons (hospitals). I then use that map as my base and still have both axes to work with in Tableau. This may give you more flexibility to build your heat map and not have to worry about the hospital points.
Thanks a lot, Don. Sarah's post is brilliant! It should work for us.
Thanks for the hint. Do I need a separate account with Mapbox? How it's integrated with Tableau?