Street-network Sprawl in Pattallassang, Indonesia

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.

Pattallassang: city in Sulawesi Selatan, Indonesia

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 Pattallassang, Indonesia on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Pattallassang as of 2014, the overall level of street-network sprawl is 2.82, 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 4.35, 2.02, 4.26 and 3.0. Disconnectivity in street construction in Pattallassang follows a zig-zag trend. In 1976-1990, street construction was most disconnected, while construction was most connected in 1975.

Quantity of street network construction: The street network in Pattallassang spans a total of 76 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 2.02, which is relatively 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 4.35, 2.19, 2.73 and 2.82. The SNDi of the aggregate street network in fell at first, but Pattallassang has worsened in disconnectivity since 1990.

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

How do development practices in Pattallassang fare in comparison to others in Sulawesi Selatan? Most recently in 2001-2014, street construction in Pattallassang was the 13th-most disconnected out of the 16 cities in Sulawesi Selatan. Its position in the ranks since 1975 has fallen; relative to other cities in Sulawesi Selatan, street construction in Pattallassang has become more connected. Pattallassang ranked 6th in 1975, 14th in 1976-1990, 8th in 1991-2000 and 13th in 2001-2014.

Pattallassang and Indonesia 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 decrease.

How do development practices in Pattallassang fare in comparison to others in Indonesia? Most recently in 2001-2014, street construction in Pattallassang was the 219th-most disconnected out of the 363 cities in Indonesia. Its position in the ranks since 1975 has fallen; relative to other cities in Indonesia, street construction in Pattallassang has become more connected. Pattallassang ranked 67th in 1975, 182nd in 1976-1990, 125th in 1991-2000 and 219th in 2001-2014.

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

To date, Pattallassang is the 13th-most disconnected out of the 16 cities in Sulawesi Selatan. Its position in the ranks since 1975 has fallen; relative to other cities in Sulawesi Selatan, the street network in Pattallassang has become more connected. Pattallassang ranked 6th in 1975, 14th in 1976-1990, 13th in 1991-2000 and 13th in 2001-2014.

Pattallassang and Indonesia follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these was at its lowest in 1976-1990.

To date, Pattallassang is the 232nd-most disconnected out of the 363 cities in Indonesia. Its position in the ranks since 1975 has fallen; relative to other cities in Indonesia, the street network in Pattallassang has become more connected. Pattallassang ranked 67th in 1975, 253rd in 1976-1990, 218th in 1991-2000 and 232nd in 2001-2014.

As of 2015, Pattallassang had a built-up area of 2.23 square kilometers, and a population of 61017 people.

These are some other cities with approximately the same population: