Street-network Sprawl in ঈদগাঁও-Idgaon, Bangladesh

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.

ঈদগাঁও-Idgaon: city in Chittagong, Bangladesh

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 ঈদগাঁও-Idgaon, Bangladesh on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in ঈদগাঁও-Idgaon as of 2014, the overall level of street-network sprawl is 5.2, which is highly disconnected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 5.8, 2.48, 5.7 and nan. Data was not available in 2001-2014.

Quantity of street network construction: The street network in ঈদগাঁও-Idgaon spans a total of 29 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 5.8, 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 5.8, 5.25, 5.27 and 5.2. Disconnectivity in ঈদগাঁও-Idgaon's street network follows a zig-zag trend. In 2001-2014, the city was most disconnected; while it was most connected in 1975.

ঈদগাঁও-Idgaon and Chittagong 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 Chittagong peaked in 1991-2000.

How do development practices in ঈদগাঁও-Idgaon fare in comparison to others in Chittagong? out of the 21 cities in Chittagong. Its position in the ranks since 1975 has fallen; relative to other cities in Chittagong, street construction in ঈদগাঁও-Idgaon has become more connected. ঈদগাঁও-Idgaon ranked 4th in 1975, 13th in 1976-1990 and 6th in 1991-2000. There was no ranking in 2001-2014 due to unavailable data.

ঈদগাঁও-Idgaon and Bangladesh 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 Bangladesh rose steadily.

How do development practices in ঈদগাঁও-Idgaon fare in comparison to others in Bangladesh? out of the 157 cities in Bangladesh. Its position in the ranks since 1975 has fallen; relative to other cities in Bangladesh, street construction in ঈদগাঁও-Idgaon has become more connected. ঈদগাঁও-Idgaon ranked 11th in 1975, 65th in 1976-1990 and 21st in 1991-2000. There was no ranking in 2001-2014 due to unavailable data.

ঈদগাঁও-Idgaon and Chittagong do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in ঈদগাঁও-Idgaon followed a zig-zag trend with an overall decrease, while the SNDi of street constructions in Chittagong peaked in 1976-1990.

To date, ঈদগাঁও-Idgaon is the 11th-most disconnected out of the 21 cities in Chittagong. Its position in the ranks since 1975 has fallen; relative to other cities in Chittagong, the street network in ঈদগাঁও-Idgaon has become more connected. ঈদগাঁও-Idgaon ranked 4th in 1975, 10th in 1976-1990, 10th in 1991-2000 and 11th in 2001-2014.

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

To date, ঈদগাঁও-Idgaon is the 34th-most disconnected out of the 157 cities in Bangladesh. Its position in the ranks since 1975 has fallen; relative to other cities in Bangladesh, the street network in ঈদগাঁও-Idgaon has become more connected. ঈদগাঁও-Idgaon ranked 11th in 1975, 20th in 1976-1990, 24th in 1991-2000 and 34th in 2001-2014.

As of 2015, ঈদগাঁও-Idgaon had a built-up area of 1.23 square kilometers, and a population of 74050 people.

These are some other cities with approximately the same population: