PittsburghUnited States |
GuangzhouChina |
312 819
(2006) |
312 819
(2006)
13 438 972
(2009) |
13 438 972
(2009) |
151 km2
|
151 km2
7 434 km2
|
7 434 km2
|
2 071.65
/km2 |
2 071.65/km2
1 807.77/km2
|
1 807.77
/km2 |