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I am able to trick Tableau into plotting the Continental US in a Lambert Conformal Conic projection (because Mercator is terrible), but I cannot get the polygon centroids to plot so that I can create pie charts within each state. Is Tableau a one-trick pony that can only do this if in a Mercator projection? If so, would I be able to create said map in Mapbox and bring it over to Tableau? If so, how? Note: I tried creating a point shapefile using the same method as the polygon shapefile. No joy.

1 answer
  1. Feb 16, 2022, 11:52 PM

    Hi,

    You might want to check out Sarah Battersby's blogs (below) on re-projecting and there might be some pointers in one of those blog posts. I think you're probably going to need to use QGIS (free open source GIS software) to project those centroid points into proper projection (see blog post #2 below the disclaimer, when using QGIS) to align with whatever work you've already done for the U.S. map layer. Best, Don

     

    https://community.tableau.com/s/news/a0A4T000001v7TEUAY/working-with-projected-data-in-tableau-part-i-map-projection-basics

     

    https://community.tableau.com/s/news/a0A4T000001v7SpUAI/working-with-projected-data-in-tableau-part-ii-data-manipulation

     

    https://community.tableau.com/s/news/a0A4T000001v7PrUAI/working-with-projected-data-in-tableau-part-iii-even-more-data-manipulation

     

    https://community.tableau.com/s/news/a0A4T000001v7SuUAI/working-with-projected-data-in-tableau-part-iv-base-map-tiles-polar-data

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