Zhangye: city in Gansu, 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 Zhangye, China on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Zhangye as of 2014, the overall level of street-network sprawl is 2.4, which is in the 40th to 60th percentile of disconnectedness.
Trends in street network construction: The SNDis of street construction for the respective time periods are nan, 1.98, 3.37 and 2.88. Data was not available in 1975.
Quantity of street network construction: The street network in Zhangye spans a total of 52 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 1.98, 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 nan, 1.96, 2.21 and 2.4. Data was not available in 1975.
Zhangye and Gansu 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 Gansu was at its lowest in 1991-2000.
How do development practices in Zhangye fare in comparison to others in Gansu? Most recently in 2001-2014, street construction in Zhangye was the 13th-most disconnected out of the 34 cities in Gansu. Its position in the ranks since 1975 has risen; relative to other cities in Gansu, street construction in Zhangye has become more disconnected. Zhangye ranked 21st in 1976-1990, 4th in 1991-2000 and 13th in 2001-2014. There was no ranking in 1975 due to unavailable data.
Zhangye 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 Zhangye fare in comparison to others in China? Most recently in 2001-2014, street construction in Zhangye was the 406th-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 Zhangye has become more disconnected. Zhangye ranked 669th in 1976-1990, 186th in 1991-2000 and 406th in 2001-2014. There was no ranking in 1975 due to unavailable data.
Zhangye and Gansu 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 Gansu fell steadily.
To date, Zhangye is the 18th-most disconnected out of the 34 cities in Gansu. Its position in the ranks since 1975 has risen; relative to other cities in Gansu, the street network in Zhangye has become more disconnected. Zhangye ranked 23rd in 1976-1990, 20th in 1991-2000 and 18th in 2001-2014. There was no ranking in 1975 due to unavailable data.
Zhangye 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, Zhangye is the 531st-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 Zhangye has become more disconnected. Zhangye ranked 669th in 1976-1990, 565th in 1991-2000 and 531st in 2001-2014. There was no ranking in 1975 due to unavailable data.
As of 2015, Zhangye had a built-up area of 19.92 square kilometers, and a population of 217932 people.
These are some other cities with approximately the same population: