Yizhang: city in Hunan, 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 Yizhang, China on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Yizhang as of 2014, the overall level of street-network sprawl is 3.56, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are nan, 2.1, 6.21 and 3.89. Data was not available in 1975.
Quantity of street network construction: The street network in Yizhang spans a total of 104 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, 2.38, 4.08 and 3.56. Data was not available in 1975.
Yizhang and Hunan 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 Hunan followed a zig-zag trend with an overall decrease.
How do development practices in Yizhang fare in comparison to others in Hunan? Most recently in 2001-2014, street construction in Yizhang was the 15th-most disconnected out of the 95 cities in Hunan. Its position in the ranks since 1975 has risen; relative to other cities in Hunan, street construction in Yizhang has become more disconnected. Yizhang ranked 40th in 1976-1990, 2nd in 1991-2000 and 15th in 2001-2014. There was no ranking in 1975 due to unavailable data.
Yizhang 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 Yizhang fare in comparison to others in China? Most recently in 2001-2014, street construction in Yizhang was the 209th-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 Yizhang has become more disconnected. Yizhang ranked 616th in 1976-1990, 29th in 1991-2000 and 209th in 2001-2014. There was no ranking in 1975 due to unavailable data.
Yizhang and Hunan 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 Hunan peaked in 1976-1990.
To date, Yizhang is the 10th-most disconnected out of the 95 cities in Hunan. Its position in the ranks since 1975 has risen; relative to other cities in Hunan, the street network in Yizhang has become more disconnected. Yizhang ranked 36th in 1976-1990, 7th in 1991-2000 and 10th in 2001-2014. There was no ranking in 1975 due to unavailable data.
Yizhang 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, Yizhang is the 161st-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 Yizhang has become more disconnected. Yizhang ranked 492nd in 1976-1990, 87th in 1991-2000 and 161st in 2001-2014. There was no ranking in 1975 due to unavailable data.
As of 2015, Yizhang had a built-up area of 3.65 square kilometers, and a population of 65590 people.
These are some other cities with approximately the same population: