Street-network Sprawl in Dagon Seikkan, Myanmar

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.

Dagon Seikkan: city in Yangon, Myanmar

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 Dagon Seikkan, Myanmar on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Dagon Seikkan as of 2014, the overall level of street-network sprawl is 0.57, which is relatively well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are nan, 0.4, 0.65 and 0.5. Data was not available in 1975.

Quantity of street network construction: The street network in Dagon Seikkan spans a total of 189 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of nan, 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 nan, 0.4, 0.61 and 0.57. Data was not available in 1975.

Dagon Seikkan and Yangon 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 Yangon was at its lowest in 1991-2000.

How do development practices in Dagon Seikkan fare in comparison to others in Yangon? Most recently in 2001-2014, street construction in Dagon Seikkan was the 4th-most disconnected out of the 7 cities in Yangon. Its position in the ranks since 1975 has risen; relative to other cities in Yangon, street construction in Dagon Seikkan has become more disconnected. Dagon Seikkan ranked 6th in 1976-1990, 4th in 1991-2000 and 4th in 2001-2014. There was no ranking in 1975 due to unavailable data.

Dagon Seikkan and Myanmar 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 Myanmar was at its lowest in 1991-2000.

How do development practices in Dagon Seikkan fare in comparison to others in Myanmar? Most recently in 2001-2014, street construction in Dagon Seikkan was the 75th-most disconnected out of the 107 cities in Myanmar. Its position in the ranks since 1975 has risen; relative to other cities in Myanmar, street construction in Dagon Seikkan has become more disconnected. Dagon Seikkan ranked 81st in 1976-1990, 63rd in 1991-2000 and 75th in 2001-2014. There was no ranking in 1975 due to unavailable data.

Dagon Seikkan and Yangon 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 Yangon was at its lowest in 1991-2000.

To date, Dagon Seikkan is the 7th-most disconnected out of the 7 cities in Yangon. Its position in the ranks since 1975 has not changed. Dagon Seikkan ranked 7th in 1976-1990, 7th in 1991-2000 and 7th in 2001-2014. There was no ranking in 1975 due to unavailable data.

Dagon Seikkan and Myanmar 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 Myanmar was at its lowest in 1991-2000.

To date, Dagon Seikkan is the 102nd-most disconnected out of the 107 cities in Myanmar. Its position in the ranks since 1975 has fallen; relative to other cities in Myanmar, the street network in Dagon Seikkan has become more connected. Dagon Seikkan ranked 93rd in 1976-1990, 95th in 1991-2000 and 102nd in 2001-2014. There was no ranking in 1975 due to unavailable data.

As of 2015, Dagon Seikkan had a built-up area of 2.36 square kilometers, and a population of 129529 people.

These are some other cities with approximately the same population: