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Continuous Area Cartograms of the British Population.
Illustrations of the results of applying different constraints.
Basemap of
Counties and
Major Cities
Cartogram
Preserving
Coastline
Cartogram
Minimising
Internal
Boundaries
Approximate
Pseudo-
Cartogram
Figure 3.1 Top left is the basemap and next to that is a continuous area pop-
ulation cartogram preserving the physical coastline. Notice how the mass of
northern English conurbations are squeezed, like toothpaste, up through the neck
of Scotland. The bottom left is Tobler's pseudo-cartogram, where the marginal
distributions, in this case of latitude and longitude, are equalised.
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