Modifiable Areal Unit Problem (Openshaw, 1984)
Scale and delineation mismatch between:
In some cases, it can seriously mislead analysis on aggregated data (e.g. Flint, MI!!!)
Always keep MAUP in mind when exploring aggregated data!!!
Align with your purpose
Different classification schemes can produce widely different maps as a result of:
Best advice is to explore different ones and combine choropleths with other graphical devices like histograms or density plots
“Data maps where the variable is encoded, not by a color gradient, but by distorting the shape/size of the geographical objects”
Geographic Data Science’18 by Dani Arribas-Bel is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.