I'm not sure what version of Tableau this is in... but check out the impressive work by Richard Leeke here:
Good luck! This has been a challenge to me, as well
Thank you. It is interesting. I've learned some stuffs but that is not exactly what I am looking for and it is a too old version.
In fact, I've samples of what interests me but version 8.2 or before or 9.3 and newest.
I can't open 9.3 version because I've got a licence at my job and I can't upgrade.
Older version are helpful, but it has changed a lot between 8.2 and 9.1, for exemple to edit relationsships and also the mapping has enhanced.
So that is why I would like to watch a distance calculation on a map in version 9.1...