Parliamentary Constituencies - annotated base map shaded by unemployment rate.

Continuously shaded for 633 areas from the 1981 census figures on an equal land area map with annotation applied automatically - software by author on an Archimedes computer.

These units have the most equal levels of population of any set in Britain. Each has a single elected member of parliament. They are rarely used in mapping as no administrative role is given to them. Their apparently varying importance makes this type of map inappropriate for depicting election results.

Ninth print from a series of ten.