Gerth's original note said the display "has the usual problems of choropleth maps (no weighting for population density), but when things are this bad, it hardly matters." When I wrote back ...

The term “choropleth” refers to maps that ... The term “dasymetric” refers to a map that accounts for population density in a given area. Instead of filling an entire state or county ...

In the map above, for example, population hotspots can be seen in cities such as London, Birmingham, Glasgow and Edinburgh. Choropleth maps do, however, have limitations. For example, they may ...

Introduction: Review the Warm-Up by discussing thematic maps that can show everything from population density to bushels ... types of thematic maps such as choropleth maps and cartograms.