Siyang: city in Jiangsu, 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 Siyang, China on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Siyang as of 2014, the overall level of street-network sprawl is 0.43, which is very well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 0.51, -0.73, 0.05 and 0.54. The disconnectivity of new streets constructed in Siyang fell, then rose. In 1976-1990, new street layouts were the most connected.
Quantity of street network construction: The street network in Siyang spans a total of 323 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 0.54, 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 0.51, 0.08, 0.09 and 0.43. The SNDi of the aggregate street network in fell at first, but Siyang has worsened in disconnectivity since 1990.
Siyang and Jiangsu do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Siyang was at its lowest in 1976-1990, while the SNDi of street constructions in Jiangsu followed a zig-zag trend with an overall increase.
How do development practices in Siyang fare in comparison to others in Jiangsu? Most recently in 2001-2014, street construction in Siyang was the 79th-most disconnected out of the 87 cities in Jiangsu. Its position in the ranks since 1975 has fallen; relative to other cities in Jiangsu, street construction in Siyang has become more connected. Siyang ranked 62nd in 1975, 86th in 1976-1990, 74th in 1991-2000 and 79th in 2001-2014.
Siyang and China do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Siyang 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 Siyang fare in comparison to others in China? Most recently in 2001-2014, street construction in Siyang was the 1160th-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 Siyang has become more connected. Siyang ranked 992nd in 1975, 1454th in 1976-1990, 1073rd in 1991-2000 and 1160th in 2001-2014.
Siyang and Jiangsu do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Siyang was at its lowest in 1976-1990, while the SNDi of street constructions in Jiangsu peaked in 1976-1990.
To date, Siyang is the 79th-most disconnected out of the 87 cities in Jiangsu. Its position in the ranks since 1975 has fallen; relative to other cities in Jiangsu, the street network in Siyang has become more connected. Siyang ranked 62nd in 1975, 81st in 1976-1990, 80th in 1991-2000 and 79th in 2001-2014.
Siyang and China do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Siyang was at its lowest in 1976-1990, while the SNDi of street constructions in China peaked in 1976-1990.
To date, Siyang is the 1442nd-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 Siyang has become more connected. Siyang ranked 992nd in 1975, 1449th in 1976-1990, 1494th in 1991-2000 and 1442nd in 2001-2014.
As of 2015, Siyang had a built-up area of 41.44 square kilometers, and a population of 158298 people.
These are some other cities with approximately the same population: