Street-network Sprawl in Amer, India

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.

Amer: city in Rajasthan, India

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 Amer, India on the sprawlmap

Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Amer as of 2014, the overall level of street-network sprawl is 4.98, which is highly disconnected.

Trends in street network construction: The SNDis of street construction for the respective time periods are 4.47, 6.47, 7.63 and 4.88. Street construction in Amer increased in disconnectivity initially but has since improved. The streets constructed in 1991-2000 were the most disconnected.

Quantity of street network construction: The street network in Amer spans a total of 60 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 4.88, which is highly disconnected.

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 4.47, 4.57, 5.14 and 4.98. The aggregate street network in Amer increased in disconnectivity initially,but the trend has turned around after 2000.

Amer and Rajasthan do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Amer peaked in 1991-2000, while the SNDi of street constructions in Rajasthan rose steadily.

How do development practices in Amer fare in comparison to others in Rajasthan? Most recently in 2001-2014, street construction in Amer was the 7th-most disconnected out of the 135 cities in Rajasthan. Its position in the ranks since 1975 has risen; relative to other cities in Rajasthan, street construction in Amer has become more disconnected. Amer ranked 8th in 1975, 3rd in 1976-1990, 1st in 1991-2000 and 7th in 2001-2014.

Amer and India do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Amer peaked in 1991-2000, while the SNDi of street constructions in India rose steadily.

How do development practices in Amer fare in comparison to others in India? Most recently in 2001-2014, street construction in Amer was the 260th-most disconnected out of the 1716 cities in India. Its position in the ranks since 1975 has fallen; relative to other cities in India, street construction in Amer has become more connected. Amer ranked 124th in 1975, 29th in 1976-1990, 30th in 1991-2000 and 260th in 2001-2014.

Amer and Rajasthan do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Amer peaked in 1991-2000, while the SNDi of street constructions in Rajasthan rose steadily.

To date, Amer is the 2nd-most disconnected out of the 135 cities in Rajasthan. Its position in the ranks since 1975 has risen; relative to other cities in Rajasthan, the street network in Amer has become more disconnected. Amer ranked 8th in 1975, 5th in 1976-1990, 4th in 1991-2000 and 2nd in 2001-2014.

Amer and India do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Amer peaked in 1991-2000, while the SNDi of street constructions in India rose steadily.

To date, Amer is the 123rd-most disconnected out of the 1716 cities in India. Its position in the ranks since 1975 has risen; relative to other cities in India, the street network in Amer has become more disconnected. Amer ranked 124th in 1975, 128th in 1976-1990, 87th in 1991-2000 and 123rd in 2001-2014.

As of 2015, Amer had a built-up area of 1.33 square kilometers, and a population of 77262 people.

These are some other cities with approximately the same population: