Chahar Mahall and Bakhtiari: region in Iran
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 Chahar Mahall and Bakhtiari, Iran on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Chahar Mahall and Bakhtiari as of 2014, the overall level of street-network sprawl is 2.22, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 4.88, 1.31, 2.49 and 3.49. The disconnectivity of new streets constructed in Chahar Mahall and Bakhtiari fell, then rose. In 1976-1990, new street layouts were the most connected.
Quantity of street network construction: The street network in Chahar Mahall and Bakhtiari spans a total of 5189 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 3.49, 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 4.88, 1.5, 1.64 and 2.22. The SNDi of the aggregate street network in fell at first, but Chahar Mahall and Bakhtiari has worsened in disconnectivity since 1990.
The level of street-network sprawl in new development in Chahar Mahall and Bakhtiari was at its lowest in 1976-1990. To get a sense of how street development has changed in Chahar Mahall and Bakhtiari, we can consider two of its most populous cities: Shahr-e Kord and Lordegan. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Shahr-e Kord peaked in 1991-2000. The level of street-network sprawl in new development in Lordegan followed a zig-zag trend.
How do development practices in Chahar Mahall and Bakhtiari fare in comparison to others in Iran? Most recently in 2001-2014, street construction in Chahar Mahall and Bakhtiari was the 19th-most disconnected out of the 31 regions in Iran. Its position in the ranks since 1975 has fallen; relative to other regions in Iran, street construction in Chahar Mahall and Bakhtiari has become more connected. Chahar Mahall and Bakhtiari ranked 6th in 1975, 30th in 1976-1990, 25th in 1991-2000 and 19th in 2001-2014.
As of 2014, the city with the most disconnected street network in Chahar Mahall and Bakhtiari is Lordegan with an SNDi of 1.91, which is relatively well-connected. Conversely, the most connected city is Shahr-e Kord with an SNDi of 0.9, which is relatively well-connected. See trends for these cities: Shahr-e Kord, Lordegan
The level of street-network sprawl in the aggregate network in Chahar Mahall and Bakhtiari was at its lowest in 1976-1990. To get a sense of how the aggregate street network has changed in Chahar Mahall and Bakhtiari, we can consider two of its most populous cities: Shahr-e Kord and Lordegan. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Shahr-e Kord rose steadily. The level of street-network sprawl in the aggregate network in Lordegan followed a zig-zag trend.
To date, Chahar Mahall and Bakhtiari is the 30th-most disconnected out of the 31 regions in Iran. Its position in the ranks since 1975 has fallen; relative to other regions in Iran, the street network in Chahar Mahall and Bakhtiari has become more connected. Chahar Mahall and Bakhtiari ranked 6th in 1975, 30th in 1976-1990, 30th in 1991-2000 and 30th in 2001-2014.