Quanzhou: city in Fujian, China
What exactly constitutes the spatial extent of the city? For these aggregations, we used the Global Human Settlement Layer Urban Center Database (GHS-UCDB) to define the boundaries of the city. These cities -- or urban centers -- cover areas that are densely populated and built-up, and so may extend beyond the spatial borders of these cities that we may be familiar with. The GHS area is shaded in blue.
View Quanzhou, China on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Quanzhou as of 2014, the overall level of street-network sprawl is 2.21, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 1.91, 2.13, 2.84 and 2.7. Street construction in Quanzhou increased in disconnectivity initially but has since improved. The streets constructed in 1991-2000 were the most disconnected.
Quantity of street network construction: The street network in Quanzhou spans a total of 3395 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 2.13, which is relatively well-connected.
Effect on the aggregate network: New construction in each period adds to the total stock of streets, but does not change streets that have already been built. Therefore, it has a limited effect on the street network as a whole. The SNDis of the aggregate street network in the respective time periods are 1.91, 2.11, 2.15 and 2.21. Overall, the SNDi of the aggregate street network has risen: the street network in Quanzhou has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.2 points, but between 1991-2000 and 2001-2014, it rose by just 0.07.
Quanzhou and Fujian follow the same trend in the disconnectivity of their street network constructions. The SNDi for both of these peaked in 1991-2000.
How do development practices in Quanzhou fare in comparison to others in Fujian? Most recently in 2001-2014, street construction in Quanzhou was the 19th-most disconnected out of the 55 cities in Fujian. Its position in the ranks since 1975 has risen; relative to other cities in Fujian, street construction in Quanzhou has become more disconnected. Quanzhou ranked 23rd in 1975, 29th in 1976-1990, 10th in 1991-2000 and 19th in 2001-2014.
Quanzhou and China do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Quanzhou peaked in 1991-2000, while the SNDi of street constructions in China followed a zig-zag trend with an overall decrease.
Quanzhou and Fujian follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Quanzhou is the 29th-most disconnected out of the 55 cities in Fujian. Its position in the ranks since 1975 has fallen; relative to other cities in Fujian, the street network in Quanzhou has become more connected. Quanzhou ranked 23rd in 1975, 30th in 1976-1990, 30th in 1991-2000 and 29th in 2001-2014.
Quanzhou and China do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Quanzhou rose steadily, while the SNDi of street constructions in China peaked in 1976-1990.
As of 2015, Quanzhou had a built-up area of 446.82 square kilometers, and a population of 4009699 people.
These are some other cities with approximately the same population: