18 6Built systems, built areas, and whole regions
Bra+ Ber+
Chi+ Kua+ Bar+
Atl•RahPor•• Kag•SamUla•- Te gBam+•
Sdt+Eas•Nan•Abe•Cut• Ott•Sam•
Iqu•Erz•Edm•Sto+Phi+(^2002)
40
60
80
100
120
46 81216
Nai+
Rom+
Buc+
Bei
Seo
Cai
Mex
San
Te h Ban
Sap+
Mos
Lon*
Number of satellite cities in urban region
Average distance from metro area to centers of satellite cities (km)
Figure 7.12Distance from metropolitan area to satellite cities relative to the
number of satellite cities in an urban region. Only satellite cities≥20 km from the
metro-area border are included. The area of a satellite city is almost always
noticeably larger than that for the more numerous towns present (see Color
Figures 2--39). 10 km = 6.2 mi. See Figure 7.2 caption.
their human uses all remain under a degree of degradation threat. Strategically
protecting large greenspaces in key areas, especially in the outer urban-region
ring, in the face of many expanding urban circles, is ahigh priority.
Towns in the urban-region ring
[A13]In urban regions half the towns (excluding those by water bodies) are in
agricultural areas, and a fifth near the boundary between agricultural and natural areas
(Figure7. 13).
Since the urban regions are overwhelmingly dominated by cropland, not sur-
prisingly towns are most common in mainly cropland areas. These towns may