Street-network Sprawl in Bambamarca, Peru

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.

Bambamarca: city in Cajamarca, Peru

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 Bambamarca, Peru on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Bambamarca as of 2014, the overall level of street-network sprawl is 0.14, which is very well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 0.18, nan, nan and nan. Data was not available in 1976-1990, 1991-2000 and 2001-2014.

Quantity of street network construction: The street network in Bambamarca spans a total of 22 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 0.18, which is very well-connected.

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 0.18, 0.18, 0.18 and 0.14. Overall, the SNDi of the aggregate street network has fallen: the street network in Bambamarca has become more connected. This decrease has quickened: between 1975 and 1976-1990, SNDi fell by 0.0 points, but between 1991-2000 and 2001-2014, it fell by just 0.04.

Bambamarca and Cajamarca do not follow the same trend in the disconnectivity of their street network constructions. There was not enough data from the city, as well as the Cajamarca's street network construction.

How do development practices in Bambamarca fare in comparison to others in Cajamarca? out of the 4 cities in Cajamarca. Bambamarca ranked 4th in 1975. There was no ranking in 1976-1990, 1991-2000, and 2001-2014 due to unavailable data.

Bambamarca and Peru 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 Peru followed a zig-zag trend with an overall increase.

How do development practices in Bambamarca fare in comparison to others in Peru? out of the 49 cities in Peru. Bambamarca ranked 43rd in 1975. There was no ranking in 1976-1990, 1991-2000, and 2001-2014 due to unavailable data.

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

To date, Bambamarca is the 4th-most disconnected out of the 4 cities in Cajamarca. Its position in the ranks since 1975 has not changed. Bambamarca ranked 4th in 1975, 4th in 1976-1990, 4th in 1991-2000 and 4th in 2001-2014.

Bambamarca and Peru do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Bambamarca fell steadily, while the SNDi of street constructions in Peru was at its lowest in 1976-1990.

To date, Bambamarca is the 48th-most disconnected out of the 49 cities in Peru. Its position in the ranks since 1975 has fallen; relative to other cities in Peru, the street network in Bambamarca has become more connected. Bambamarca ranked 43rd in 1975, 44th in 1976-1990, 46th in 1991-2000 and 48th in 2001-2014.

As of 2015, Bambamarca had a built-up area of 0.24 square kilometers, and a population of 73085 people.

These are some other cities with approximately the same population: