Street-network Sprawl in Dera Ghazi Khan, Pakistan

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.

Dera Ghazi Khan: city in Punjab, Pakistan

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 Dera Ghazi Khan, Pakistan on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Dera Ghazi Khan as of 2014, the overall level of street-network sprawl is 1.47, which is relatively well-connected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 1.03, 0.79, nan and 1.7. Data was not available in 1991-2000.

Quantity of street network construction: The street network in Dera Ghazi Khan spans a total of 128 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 1.7, 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 1.03, 0.94, 1.02 and 1.47. The SNDi of the aggregate street network in fell at first, but Dera Ghazi Khan has worsened in disconnectivity since 1990.

Dera Ghazi Khan and Punjab 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 Punjab peaked in 1991-2000.

How do development practices in Dera Ghazi Khan fare in comparison to others in Punjab? Most recently in 2001-2014, street construction in Dera Ghazi Khan was the 55th-most disconnected out of the 99 cities in Punjab. Its position in the ranks since 1975 has fallen; relative to other cities in Punjab, street construction in Dera Ghazi Khan has become more connected. Dera Ghazi Khan ranked 49th in 1975, 66th in 1976-1990 and 55th in 2001-2014. There was no ranking in 1991-2000 due to unavailable data.

Dera Ghazi Khan and Pakistan 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 Pakistan peaked in 1991-2000.

How do development practices in Dera Ghazi Khan fare in comparison to others in Pakistan? Most recently in 2001-2014, street construction in Dera Ghazi Khan was the 100th-most disconnected out of the 198 cities in Pakistan. Its position in the ranks since 1975 has fallen; relative to other cities in Pakistan, street construction in Dera Ghazi Khan has become more connected. Dera Ghazi Khan ranked 104th in 1975, 134th in 1976-1990 and 100th in 2001-2014. There was no ranking in 1991-2000 due to unavailable data.

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

To date, Dera Ghazi Khan is the 72nd-most disconnected out of the 99 cities in Punjab. Its position in the ranks since 1975 has fallen; relative to other cities in Punjab, the street network in Dera Ghazi Khan has become more connected. Dera Ghazi Khan ranked 49th in 1975, 70th in 1976-1990, 74th in 1991-2000 and 72nd in 2001-2014.

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

To date, Dera Ghazi Khan is the 148th-most disconnected out of the 198 cities in Pakistan. Its position in the ranks since 1975 has fallen; relative to other cities in Pakistan, the street network in Dera Ghazi Khan has become more connected. Dera Ghazi Khan ranked 104th in 1975, 148th in 1976-1990, 156th in 1991-2000 and 148th in 2001-2014.

As of 2015, Dera Ghazi Khan had a built-up area of 2.94 square kilometers, and a population of 386995 people.

These are some other cities with approximately the same population: