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The distribution of population by county in 1981 (Colour).

The 64 counties are shown as spheres, the volumes of which are in proportion to their populations, coloured to match the colours in the map and projected on an equal land area map, viewed from the south software written by the author and Clares micro-supplies on an Archimedes computer.

Three-dimensional views can be misleading. Here, Devon appears larger than Strathclyde because it is drawn in the foreground, while the size of London causes it to overlap with its neighbours. The picture is pleasing, and looks sophisticated, but it is not a sound basis for visualization.