Sanya: city in Hainan, 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 Sanya, China on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Sanya as of 2014, the overall level of street-network sprawl is 3.76, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 3.06, nan, 3.66 and 5.05. Data was not available in 1976-1990.
Quantity of street network construction: The street network in Sanya spans a total of 581 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 5.05, 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 3.06, 3.06, 3.12 and 3.76. Overall, the SNDi of the aggregate street network has risen: the street network in Sanya has become more disconnected.
Sanya and Hainan 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 Hainan followed a zig-zag trend with an overall decrease.
How do development practices in Sanya fare in comparison to others in Hainan? Most recently in 2001-2014, street construction in Sanya was the 1st-most disconnected out of the 16 cities in Hainan. Its position in the ranks since 1975 has risen; relative to other cities in Hainan, street construction in Sanya has become more disconnected. Sanya ranked 7th in 1975, 4th in 1991-2000 and 1st in 2001-2014. There was no ranking in 1976-1990 due to unavailable data.
Sanya 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 Sanya fare in comparison to others in China? Most recently in 2001-2014, street construction in Sanya was the 99th-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 Sanya has become more disconnected. Sanya ranked 233rd in 1975, 154th in 1991-2000 and 99th in 2001-2014. There was no ranking in 1976-1990 due to unavailable data.
Sanya and Hainan do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Sanya rose steadily, while the SNDi of street constructions in Hainan peaked in 1976-1990.
To date, Sanya is the 4th-most disconnected out of the 16 cities in Hainan. Its position in the ranks since 1975 has risen; relative to other cities in Hainan, the street network in Sanya has become more disconnected. Sanya ranked 7th in 1975, 8th in 1976-1990, 7th in 1991-2000 and 4th in 2001-2014.
Sanya and China do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Sanya rose steadily, while the SNDi of street constructions in China peaked in 1976-1990.
To date, Sanya is the 134th-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 Sanya has become more disconnected. Sanya ranked 233rd in 1975, 271st in 1976-1990, 234th in 1991-2000 and 134th in 2001-2014.
As of 2015, Sanya had a built-up area of 40.19 square kilometers, and a population of 452525 people.
These are some other cities with approximately the same population: