Street-network Sprawl in Ceilândia, Brazil

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.

Ceilândia: city in Distrito Federal, Brazil

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 Ceilândia, Brazil on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Ceilândia as of 2014, the overall level of street-network sprawl is 2.88, which is in the 40th to 60th percentile of disconnectedness.

Trends in street network construction: The SNDis of street construction for the respective time periods are 1.48, 2.77, 3.18 and 5.55. In each period, new street development in Ceilândia steadily grows more disconnected than in the last.

Quantity of street network construction: The street network in Ceilândia spans a total of 2640 kilometers. The period with the greatest volume of street construction was 1976-1990. These roads have an SNDi of 2.77, which is in the 40th to 60th percentile of disconnectedness.

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 1.48, 2.33, 2.63 and 2.88. Overall, the SNDi of the aggregate street network has risen: the street network in Ceilândia has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.85 points, but between 1991-2000 and 2001-2014, it rose by just 0.25.

Ceilândia and Distrito Federal do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Ceilândia rose steadily, while the SNDi of street constructions in Distrito Federal followed a zig-zag trend with an overall increase.

How do development practices in Ceilândia fare in comparison to others in Distrito Federal? Most recently in 2001-2014, street construction in Ceilândia was the 3rd-most disconnected out of the 9 cities in Distrito Federal. Its position in the ranks since 1975 has risen; relative to other cities in Distrito Federal, street construction in Ceilândia has become more disconnected. Ceilândia ranked 7th in 1975, 4th in 1976-1990, 2nd in 1991-2000 and 3rd in 2001-2014.

Ceilândia and Brazil follow the same trend in the disconnectivity of their street network constructions. The SNDi for both of these rose steadily.

How do development practices in Ceilândia fare in comparison to others in Brazil? Most recently in 2001-2014, street construction in Ceilândia was the 48th-most disconnected out of the 348 cities in Brazil. Its position in the ranks since 1975 has risen; relative to other cities in Brazil, street construction in Ceilândia has become more disconnected. Ceilândia ranked 123rd in 1975, 71st in 1976-1990, 114th in 1991-2000 and 48th in 2001-2014.

Ceilândia and Distrito Federal do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Ceilândia rose steadily, while the SNDi of street constructions in Distrito Federal followed a zig-zag trend with an overall increase.

To date, Ceilândia is the 3rd-most disconnected out of the 9 cities in Distrito Federal. Its position in the ranks since 1975 has risen; relative to other cities in Distrito Federal, the street network in Ceilândia has become more disconnected. Ceilândia ranked 7th in 1975, 5th in 1976-1990, 4th in 1991-2000 and 3rd in 2001-2014.

Ceilândia and Brazil follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.

To date, Ceilândia is the 52nd-most disconnected out of the 348 cities in Brazil. Its position in the ranks since 1975 has risen; relative to other cities in Brazil, the street network in Ceilândia has become more disconnected. Ceilândia ranked 123rd in 1975, 81st in 1976-1990, 61st in 1991-2000 and 52nd in 2001-2014.

As of 2015, Ceilândia had a built-up area of 90.15 square kilometers, and a population of 1158153 people.

These are some other cities with approximately the same population: