Tableau is installed with an online map connection to a set of custom maps for data display provided to Tableau by a third-party called Pushpin. These maps are not from a Web Map Service (WMS), although they closely resemble WMS maps. Using this default connection, you can display your data on a map if it is already geocoded or if it simply contains countries, states, counties, zip codes, area codes, or core-based statistical areas (CBSAs). These default maps appear when you place the Latitude and Longitude fields on the Rows and Columns shelves, or when you double-click a field that has a globe icon next to it. The online maps require an Internet connection and offer up to 14 zoom levels, depending on the region of the world.
For information about Tableau map data partners, map accuracy and updates, and so on, see About Tableau Maps.