I have yet to actually use Tableau but I just attend a work shop learning about the product. One take away was that there is no way to interface with current Esri products outside of shapefiles and personal geodatabases. I would like to see Tableau go to the next level and develop a way to leverage more of Esri technologies, more specifically web services. I would like pull web content into tableau and access the data and maps giving me the ability to apply filters to the custom geography and symbology. The big take away is to save the time and effort potentially duplicating work that has been already created.
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