Currently we can plot custom regions in Tableau using polygon/line marks but this requires data preparation and that too in a specific format - i.e. a list of vertices.
It would be very helpful if Tableau could read shape files natively (e.g. ESRI .SHP files or MapInfo .MIF files) and recognize these spatial objects as first class data elements. It would then plot the data natively as a polygon/line/point depending on the type of spatial object in the shape file.
This would increase performance & make custom-maps a lot easier.