21 2Urbanization models and the regions
Figure 8.3Four alternative urbanization models applied to the Mexico City Region:
(a) Concentric rings; (b) satellite cities; (c) transportation corridors; and (d) dispersed
sites. Scattered dots = urbanization in first time stage; shading = second stage; dense
dots = third stage. See Figure 8.2, Color Figure 22, and text.urbanization models, so Chicago is only briefly included in this section. To the
north and northwest, the Chicago Region (Color Figure 13 )isconstrained by
theregion of nearby Milwaukee and by the State of Wisconsin. Only for the
concentric-zones model will the three time stages logically fit within Chicago’s
urban region. For the satellite-city model and transportation-corridors model the
first stage fits fine, but the second stage (2 times the initial metro area) only fits
with ‘‘gerrymandering” (drawing a bizarre-shaped area so something fits in), and
thethird stage (3 times) with extreme gerrymandering. For the dispersed-sites
model, the first stage fits fine, but the second and third stagescannotfitatall
(stage two requires an area 4 times and stage three 5 times the initial metro
area). Relative to the metropolitan area extent, the urban region is simply too
small.