I have been working on soemthing similar and have got to the point I want to try and build a custom map visual but don't know where to start.
In summary what I am trying to do is create a distance based circle from my data to show coverage from a centoid (chosen suburb). My data has a radius stored as Kilometers and I was hoping to use the size and buble visual, but it does not scale properly. It would be great if there was a switch to do this and take in to consideration the scale to size the circle on the map.
Are you able to add another layer to these maps? My end goal is to have the UK postcode districts (which I have already created) and then to have certain points on this map (by longitude and latitude)? Any help or advice would be much appreciated.