Tongnan: city in Chongqing, 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 Tongnan, China on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Tongnan as of 2014, the overall level of street-network sprawl is 0.87, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 3.08, 1.69, 0.48 and 0.13. In each period, new street development in Tongnan steadily grows more connected than in the last.
Quantity of street network construction: The street network in Tongnan spans a total of 171 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 0.13, which is very 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 3.08, 2.53, 1.18 and 0.87. Overall, the SNDi of the aggregate street network has fallen: the street network in Tongnan has become more connected.
Tongnan and Chongqing do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Tongnan fell steadily, while the SNDi of street constructions in Chongqing followed a zig-zag trend with an overall increase.
How do development practices in Tongnan fare in comparison to others in Chongqing? Most recently in 2001-2014, street construction in Tongnan was the 35th-most disconnected out of the 38 cities in Chongqing. Its position in the ranks since 1975 has fallen; relative to other cities in Chongqing, street construction in Tongnan has become more connected. Tongnan ranked 11th in 1975, 20th in 1976-1990, 30th in 1991-2000 and 35th in 2001-2014.
Tongnan and China do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Tongnan fell steadily, while the SNDi of street constructions in China followed a zig-zag trend with an overall decrease.
How do development practices in Tongnan fare in comparison to others in China? Most recently in 2001-2014, street construction in Tongnan was the 1264th-most disconnected out of the 1651 cities in China. Its position in the ranks since 1975 has fallen; relative to other cities in China, street construction in Tongnan has become more connected. Tongnan ranked 229th in 1975, 786th in 1976-1990, 956th in 1991-2000 and 1264th in 2001-2014.
Tongnan and Chongqing do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Tongnan fell steadily, while the SNDi of street constructions in Chongqing followed a zig-zag trend with an overall increase.
To date, Tongnan is the 36th-most disconnected out of the 38 cities in Chongqing. Its position in the ranks since 1975 has fallen; relative to other cities in Chongqing, the street network in Tongnan has become more connected. Tongnan ranked 11th in 1975, 18th in 1976-1990, 29th in 1991-2000 and 36th in 2001-2014.
Tongnan and China do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Tongnan fell steadily, while the SNDi of street constructions in China peaked in 1976-1990.
To date, Tongnan is the 1290th-most disconnected out of the 1651 cities in China. Its position in the ranks since 1975 has fallen; relative to other cities in China, the street network in Tongnan has become more connected. Tongnan ranked 229th in 1975, 444th in 1976-1990, 1068th in 1991-2000 and 1290th in 2001-2014.
As of 2015, Tongnan had a built-up area of 4.99 square kilometers, and a population of 134803 people.
These are some other cities with approximately the same population: