Street-network Sprawl in Kangan Seaport, Iran

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.

Kangan Seaport: city in Bushehr, Iran

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 Kangan Seaport, Iran on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Kangan Seaport as of 2014, the overall level of street-network sprawl is 1.58, which is relatively well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 0.88, 1.31, nan and 2.56. Data was not available in 1991-2000.

Quantity of street network construction: The street network in Kangan Seaport spans a total of 147 kilometers. The period with the greatest volume of street construction was 1976-1990. These roads have an SNDi of 1.31, 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 0.88, 1.09, 1.09 and 1.58. Overall, the SNDi of the aggregate street network has risen: the street network in Kangan Seaport has become more disconnected.

Kangan Seaport and Bushehr 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 Bushehr was at its lowest in 1976-1990.

How do development practices in Kangan Seaport fare in comparison to others in Bushehr? Most recently in 2001-2014, street construction in Kangan Seaport was the 1st-most disconnected out of the 5 cities in Bushehr. Its position in the ranks since 1975 has not changed. Kangan Seaport ranked 2nd in 1975, 2nd in 1976-1990 and 1st in 2001-2014. There was no ranking in 1991-2000 due to unavailable data.

Kangan Seaport and Iran 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 Iran was at its lowest in 1976-1990.

How do development practices in Kangan Seaport fare in comparison to others in Iran? Most recently in 2001-2014, street construction in Kangan Seaport was the 104th-most disconnected out of the 181 cities in Iran. Its position in the ranks since 1975 has risen; relative to other cities in Iran, street construction in Kangan Seaport has become more disconnected. Kangan Seaport ranked 116th in 1975, 111th in 1976-1990 and 104th in 2001-2014. There was no ranking in 1991-2000 due to unavailable data.

Kangan Seaport and Bushehr do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Kangan Seaport rose steadily, while the SNDi of street constructions in Bushehr was at its lowest in 1976-1990.

To date, Kangan Seaport is the 2nd-most disconnected out of the 5 cities in Bushehr. Its position in the ranks since 1975 has not changed. Kangan Seaport ranked 2nd in 1975, 2nd in 1976-1990, 2nd in 1991-2000 and 2nd in 2001-2014.

Kangan Seaport and Iran do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Kangan Seaport rose steadily, while the SNDi of street constructions in Iran was at its lowest in 1976-1990.

To date, Kangan Seaport is the 131st-most disconnected out of the 181 cities in Iran. Its position in the ranks since 1975 has fallen; relative to other cities in Iran, the street network in Kangan Seaport has become more connected. Kangan Seaport ranked 116th in 1975, 127th in 1976-1990, 143rd in 1991-2000 and 131st in 2001-2014.

As of 2015, Kangan Seaport had a built-up area of 4.74 square kilometers, and a population of 62238 people.

These are some other cities with approximately the same population: