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In Tableau, filled maps can be used to visually represent one measure and a symbol map can be used to visually represent, upto 2 measures. Combining both a filled map and a symbol map in a single view can help in representing 3 measures and provides more insights into the available data.
Tableau is designed to make the most of geographical data, so you can get to the “where” as well as the “why.” With built-in Tableau integration, using maps couldn't be easier! Occasionally, however, we want to get creative and display more information within the map. Now, this is obviously just for visual flavor, as the end user would see in multiple other areas the selected metric, but the technique is a nifty trick with many different applications.
Tableau automatically assigns geographic roles to fields with common geographical names, such as Country, State/Province, City, etc. Fields with a geographic role will automatically generate longitude and latitude coordinates on a map view. Geographic roles can also be manually assigned to fields that are not automatically recognized. Fields with assigned geographic roles will have a globe icon next to them.