Street-network Sprawl in Meiganga, Cameroon

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.

Meiganga: city in Adamaoua, Cameroon

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 Meiganga, Cameroon on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Meiganga as of 2014, the overall level of street-network sprawl is 1.78, which is relatively well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 0.59, 2.56, 1.88 and 4.37. Disconnectivity in street construction in Meiganga 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 Meiganga spans a total of 83 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 2.56, 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 0.59, 1.57, 1.6 and 1.78. Overall, the SNDi of the aggregate street network has risen: the street network in Meiganga has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.98 points, but between 1991-2000 and 2001-2014, it rose by just 0.18.

Meiganga and Adamaoua 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 Meiganga fare in comparison to others in Adamaoua? Most recently in 2001-2014, street construction in Meiganga was the 2nd-most disconnected out of the 5 cities in Adamaoua. Its position in the ranks since 1975 has not changed. Meiganga ranked 2nd in 1975, 2nd in 1976-1990, 2nd in 1991-2000 and 2nd in 2001-2014.

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

How do development practices in Meiganga fare in comparison to others in Cameroon? Most recently in 2001-2014, street construction in Meiganga was the 13th-most disconnected out of the 51 cities in Cameroon. Its position in the ranks since 1975 has risen; relative to other cities in Cameroon, street construction in Meiganga has become more disconnected. Meiganga ranked 29th in 1975, 21st in 1976-1990, 32nd in 1991-2000 and 13th in 2001-2014.

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

To date, Meiganga is the 2nd-most disconnected out of the 5 cities in Adamaoua. Its position in the ranks since 1975 has not changed. Meiganga ranked 2nd in 1975, 2nd in 1976-1990, 3rd in 1991-2000 and 2nd in 2001-2014.

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

To date, Meiganga is the 31st-most disconnected out of the 51 cities in Cameroon. Its position in the ranks since 1975 has fallen; relative to other cities in Cameroon, the street network in Meiganga has become more connected. Meiganga ranked 29th in 1975, 31st in 1976-1990, 32nd in 1991-2000 and 31st in 2001-2014.

As of 2015, Meiganga had a built-up area of 4.01 square kilometers, and a population of 100179 people.

These are some other cities with approximately the same population: