Tongren: city in Guizhou, 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 Tongren, China on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Tongren as of 2014, the overall level of street-network sprawl is 3.6, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 3.16, 2.4, 3.96 and 8.19. The disconnectivity of new streets constructed in Tongren fell, then rose. In 1976-1990, new street layouts were the most connected.
Quantity of street network construction: The street network in Tongren spans a total of 106 kilometers. The period with the greatest volume of street construction was 1991-2000. These roads have an SNDi of 3.96, which is highly disconnected.
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 3.16, 3.09, 3.54 and 3.6. The SNDi of the aggregate street network in fell at first, but Tongren has worsened in disconnectivity since 1990.
Tongren and Guizhou do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Tongren was at its lowest in 1976-1990, while the SNDi of street constructions in Guizhou peaked in 1991-2000.
How do development practices in Tongren fare in comparison to others in Guizhou? Most recently in 2001-2014, street construction in Tongren was the 2nd-most disconnected out of the 42 cities in Guizhou. Its position in the ranks since 1975 has risen; relative to other cities in Guizhou, street construction in Tongren has become more disconnected. Tongren ranked 7th in 1975, 15th in 1976-1990, 5th in 1991-2000 and 2nd in 2001-2014.
Tongren and China do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Tongren was at its lowest in 1976-1990, while the SNDi of street constructions in China followed a zig-zag trend with an overall decrease.
How do development practices in Tongren fare in comparison to others in China? Most recently in 2001-2014, street construction in Tongren was the 16th-most disconnected out of the 1651 cities in China. Its position in the ranks since 1975 has risen; relative to other cities in China, street construction in Tongren has become more disconnected. Tongren ranked 214th in 1975, 489th in 1976-1990, 123rd in 1991-2000 and 16th in 2001-2014.
Tongren and Guizhou do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Tongren was at its lowest in 1976-1990, while the SNDi of street constructions in Guizhou peaked in 1991-2000.
To date, Tongren is the 9th-most disconnected out of the 42 cities in Guizhou. Its position in the ranks since 1975 has fallen; relative to other cities in Guizhou, the street network in Tongren has become more connected. Tongren ranked 7th in 1975, 9th in 1976-1990, 8th in 1991-2000 and 9th in 2001-2014.
Tongren and China do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Tongren was at its lowest in 1976-1990, while the SNDi of street constructions in China peaked in 1976-1990.
To date, Tongren is the 154th-most disconnected out of the 1651 cities in China. Its position in the ranks since 1975 has risen; relative to other cities in China, the street network in Tongren has become more disconnected. Tongren ranked 214th in 1975, 259th in 1976-1990, 147th in 1991-2000 and 154th in 2001-2014.
As of 2015, Tongren had a built-up area of 7.17 square kilometers, and a population of 163648 people.
These are some other cities with approximately the same population: