the.com/choropleth
a map that lies to you with color instead of words.
means a map where regions are shaded or patterned according to a statistical value, like population density or election results.
from from greek choros (place/region) plus plethos (multitude), coined in the 1930s by geographer john k. wright to describe area-based statistical mapping.
area biasbig empty regions visually dominate over small dense ones
binning matterssame data, different color breaks, opposite story
cartogram cousincartograms fix size distortion by warping area itself
for instance
us election maps — red-blue counties make rural land outvote dense cities visually
covid dashboards 2020 — johns hopkins used choropleths to track county infection rates
census bureau maps — shades income and population by tract since the 1900s