Density marks were added to Tableau in version 2018.3. These marks add another way of finding patterns in areas where there is a lot of overlapping data or the concentration of data is very high. Density marks find their best use in creating density maps, making it super easy to find trends in spatial data. Density maps work best with custom geocoded files, as they allow for detailed granular data to be added. Granular and precise data in a small range, along with smooth changes in measure values is the ideal use case for using density maps.
For this example, we will be using the 311 calls dataset. In case you have not yet downloaded it, download it here in a .csv format: https://data.nola.gov/City-Administration/311-Calls-Historic-Data-2012-2018-/3iz8-nghx.
Now, if we want to understand the distribution of calls by Zip Code for LA, and decide to plot a...
