I have postcode data mapped to media markets in the US (DMA's) and Australia and I am looking to use this data to create a map that shows the media market boundaries.
Can you please advise whether this is enough data, what else I need and how to accomplish it?
Within the data source, it is a good idea to also include country and state names. At the bottom of this article it details which geographic values are available within Tableau:
Hope this helps!