Street-network Sprawl in Ninh Hòa, Vietnam

What is Street-network sprawl?

Street-network Sprawl is a way to measure urban sprawl, worldwide, through the connectedness of the streets. Less sprawl means more connected, more walkable streets. Well-connected streets – like New York City’s grid – are more walkable and can be served by public transit.

The street network is permanent, and its connectivity affects the livability and environmental footprint of cities for decades and centuries to come. In places with more connected streets, residents drive less and walk more. A well-connected street network is associated with better outcomes for health, the environment, sustainable consumption, social integration, and equity.

We can quantify how connected street networks are with the Street Network Disconnectedness Index (SNDi).

SNDi -- our measure of street-network sprawl (disconnectedness)

The SNDi is a comprehensive measurement of “sprawl”. It captures:

A higher SNDi means less-connected streets – i.e., more sprawl. For the 10137 cities in our dataset, the average SNDi is 2.25, with half of the cities' SNDis falling between 1.08 and 3.25.

More information on the sprawl index can be found in these research papers:

To see the state of street-network sprawl across the globe, visit the sprawlmap.

Ninh Hòa: city in Khánh Hòa, Vietnam

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 Ninh Hòa, Vietnam on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Ninh Hòa as of 2014, the overall level of street-network sprawl is 0.13, which is very well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 0.15, nan, -0.97 and nan. Data was not available in 1976-1990 and 2001-2014.

Quantity of street network construction: The street network in Ninh Hòa spans a total of 66 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 0.15, which is very 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 0.15, 0.15, 0.13 and 0.13. Disconnectivity in Ninh Hòa's street network follows a zig-zag trend. In 1991-2000, the city was most disconnected; while it was most connected in 1975.

Ninh Hòa and Khánh Hòa do not follow the same trend in the disconnectivity of their street network constructions. There was not enough data from the city, as well as the Khánh Hòa's street network construction.

How do development practices in Ninh Hòa fare in comparison to others in Khánh Hòa? out of the 4 cities in Khánh Hòa. Ninh Hòa ranked 4th in 1975 and 3rd in 1991-2000. There was no ranking in 1976-1990 and 2001-2014 due to unavailable data.

Ninh Hòa and Vietnam 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 Vietnam rose steadily.

How do development practices in Ninh Hòa fare in comparison to others in Vietnam? out of the 129 cities in Vietnam. Ninh Hòa ranked 83rd in 1975 and 105th in 1991-2000. There was no ranking in 1976-1990 and 2001-2014 due to unavailable data.

Ninh Hòa and Khánh Hòa do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Ninh Hòa followed a zig-zag trend with an overall decrease, while the SNDi of street constructions in Khánh Hòa was at its lowest in 1976-1990.

To date, Ninh Hòa is the 4th-most disconnected out of the 4 cities in Khánh Hòa. Its position in the ranks since 1975 has not changed. Ninh Hòa ranked 4th in 1975, 4th in 1976-1990, 4th in 1991-2000 and 4th in 2001-2014.

Ninh Hòa and Vietnam do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Ninh Hòa followed a zig-zag trend with an overall decrease, while the SNDi of street constructions in Vietnam rose steadily.

To date, Ninh Hòa is the 122nd-most disconnected out of the 129 cities in Vietnam. Its position in the ranks since 1975 has fallen; relative to other cities in Vietnam, the street network in Ninh Hòa has become more connected. Ninh Hòa ranked 83rd in 1975, 114th in 1976-1990, 120th in 1991-2000 and 122nd in 2001-2014.

As of 2015, Ninh Hòa had a built-up area of 4.25 square kilometers, and a population of 77524 people.

These are some other cities with approximately the same population: