Zhengyang: city in Henan, 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 Zhengyang, China on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Zhengyang as of 2014, the overall level of street-network sprawl is 1.96, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are nan, 1.63, 3.6 and 1.49. Data was not available in 1975.
Quantity of street network construction: The street network in Zhengyang spans a total of 100 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of nan, 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 nan, 1.63, 2.23 and 1.96. Data was not available in 1975.
Zhengyang and Henan do not follow the same trend in the disconnectivity of their street network constructions. There was not enough data from the city, while the SNDi of street constructions in Henan peaked in 1991-2000.
How do development practices in Zhengyang fare in comparison to others in Henan? Most recently in 2001-2014, street construction in Zhengyang was the 34th-most disconnected out of the 118 cities in Henan. Its position in the ranks since 1975 has fallen; relative to other cities in Henan, street construction in Zhengyang has become more connected. Zhengyang ranked 29th in 1976-1990, 8th in 1991-2000 and 34th in 2001-2014. There was no ranking in 1975 due to unavailable data.
Zhengyang and China do not follow the same trend in the disconnectivity of their street network constructions. There was not enough data from the city, while the SNDi of street constructions in China followed a zig-zag trend with an overall decrease.
How do development practices in Zhengyang fare in comparison to others in China? Most recently in 2001-2014, street construction in Zhengyang was the 863rd-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 Zhengyang has become more connected. Zhengyang ranked 814th in 1976-1990, 158th in 1991-2000 and 863rd in 2001-2014. There was no ranking in 1975 due to unavailable data.
Zhengyang and Henan do not follow the same trend in the disconnectivity of their aggregate street networks. There was not enough data from the city, while the SNDi of street constructions in Henan peaked in 1976-1990.
To date, Zhengyang is the 17th-most disconnected out of the 118 cities in Henan. Its position in the ranks since 1975 has risen; relative to other cities in Henan, the street network in Zhengyang has become more disconnected. Zhengyang ranked 26th in 1976-1990, 13th in 1991-2000 and 17th in 2001-2014. There was no ranking in 1975 due to unavailable data.
Zhengyang and China do not follow the same trend in the disconnectivity of their aggregate street networks. There was not enough data from the city, while the SNDi of street constructions in China peaked in 1976-1990.
To date, Zhengyang is the 719th-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 Zhengyang has become more disconnected. Zhengyang ranked 821st in 1976-1990, 558th in 1991-2000 and 719th in 2001-2014. There was no ranking in 1975 due to unavailable data.
As of 2015, Zhengyang had a built-up area of 8.93 square kilometers, and a population of 82856 people.
These are some other cities with approximately the same population: