Information Technology Reference
In-Depth Information
Population Change in Britain by
District, 1961-1991.
The area of each circle represents the total population of a
district. The circle's colour shows how that has changed:
Each colour shows the population change trajectory of a group of
Districts. Low 61/71 growth is coloured blue, 71/81 - yellow
and 81/91 - red. Mixing to make many different shades.
125%
100%
75%
50%
25%
0%
-25%
61/71
71/81
81/91
61/71
71/81
81/91
61/71
71/81
81/91
Colour shows when and where the lowest relative
rates of population growth occurred:
1961/1971
1961/1971 & 1971/1981
1971/1981
1971/1981 & 1981/1991
1981/1991
1981/1991 & 1961/1971
WHITE:
BLACK:
Continuous Growth
No Growth or Decline
The colour is mixed to show
the extent of these changes.
Where there is little deviation
from the average change the
circle appears as grey.
Figure 9.2 This 1981 population cartogram has the 459 districts coloured
according to which population trajectory each most closely matched over a 30
year period. The major conurbations have lost population continuously, while the
Home Counties ring has mostly always gained people. However, there is much
more in the detail. Unfortunately this reproduction cannot match the original
distinct set of many more colours.
Search WWH ::




Custom Search