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Daily commuting flows in population space by occupation, 1981 (Colour).

Lines drawn between 9,289 1981 census wards on an equal population cartogram, coloured according to the mix of occupations at the place of residence software by author on an Archimedes computer.

The cartogram is dominated by the orange and yellow areas of the major cities. Some distinctive blue and green streaks run in, and especially around, the capital. Parallel to some of these flows of people in the best paid jobs are those (red lines) of supervised workers, similarly rushing into this city of extremes.