6/21/2017 | @hydrooffice 1
Choropleths are a common approach to visualizing data on geographic maps. But choropleths — by design or necessity — aggregate individual data points into a single geographic region (like a country or census tract), which is all shaded a single colour. This can introduce interpretability issues (are we seeing changes in the variable of interest, or just population density?) and can fail to express the richness of the underlying data.