Street-network Sprawl in Catandica, Mozambique

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.

Catandica: city in Manica, Mozambique

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 Catandica, Mozambique on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Catandica as of 2014, the overall level of street-network sprawl is 2.03, which is relatively well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are -0.74, 2.17, 1.67 and 2.47. Disconnectivity in street construction in Catandica follows a zig-zag trend. In 1975, street construction was most disconnected, while construction was most connected in 2001-2014.

Quantity of street network construction: The street network in Catandica spans a total of 79 kilometers. The period with the greatest volume of street construction was 2001-2014. These roads have an SNDi of 2.47, 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 -0.74, 1.89, 1.75 and 2.03. Disconnectivity in Catandica's street network follows a zig-zag trend. In 1975, the city was most disconnected; while it was most connected in 2001-2014.

Catandica and Manica follow the same trend in the disconnectivity of their street network constructions. The SNDi for both of these followed a zig-zag trend with an overall increase.

How do development practices in Catandica fare in comparison to others in Manica? Most recently in 2001-2014, street construction in Catandica was the 1st-most disconnected out of the 3 cities in Manica. Its position in the ranks since 1975 has risen; relative to other cities in Manica, street construction in Catandica has become more disconnected. Catandica ranked 2nd in 1975, 1st in 1976-1990, 2nd in 1991-2000 and 1st in 2001-2014.

Catandica and Mozambique do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Catandica followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Mozambique was at its lowest in 1976-1990.

How do development practices in Catandica fare in comparison to others in Mozambique? Most recently in 2001-2014, street construction in Catandica was the 17th-most disconnected out of the 57 cities in Mozambique. Its position in the ranks since 1975 has risen; relative to other cities in Mozambique, street construction in Catandica has become more disconnected. Catandica ranked 35th in 1975, 20th in 1976-1990, 25th in 1991-2000 and 17th in 2001-2014.

Catandica and Manica follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these followed a zig-zag trend with an overall increase.

To date, Catandica is the 1st-most disconnected out of the 3 cities in Manica. Its position in the ranks since 1975 has risen; relative to other cities in Manica, the street network in Catandica has become more disconnected. Catandica ranked 2nd in 1975, 1st in 1976-1990, 2nd in 1991-2000 and 1st in 2001-2014.

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

To date, Catandica is the 21st-most disconnected out of the 57 cities in Mozambique. Its position in the ranks since 1975 has risen; relative to other cities in Mozambique, the street network in Catandica has become more disconnected. Catandica ranked 35th in 1975, 18th in 1976-1990, 25th in 1991-2000 and 21st in 2001-2014.

As of 2015, Catandica had a built-up area of 1.26 square kilometers, and a population of 116094 people.

These are some other cities with approximately the same population: