North Khorasan: 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 North Khorasan, Iran on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in North Khorasan as of 2014, the overall level of street-network sprawl is 2.77, 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 5.51, 1.57, 1.87 and 2.86. The disconnectivity of new streets constructed in North Khorasan fell, then rose. In 1976-1990, new street layouts were the most connected.
Quantity of street network construction: The street network in North Khorasan spans a total of 2028 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 2.86, which is in the 40th to 60th percentile of disconnectedness.
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 5.51, 3.1, 2.77 and 2.77. The SNDi of the aggregate street network in fell at first, but North Khorasan has worsened in disconnectivity since 2000.
The level of street-network sprawl in new development in North Khorasan was at its lowest in 1976-1990. To get a sense of how street development has changed in North Khorasan, we can consider three of its most populous cities: Bojnurd, Shirvan and Esfarayen. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Bojnurd was at its lowest in 1991-2000. The level of street-network sprawl in new development in Shirvan followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Esfarayen followed a zig-zag trend with an overall increase.
How do development practices in North Khorasan fare in comparison to others in Iran? Most recently in 2001-2014, street construction in North Khorasan was the 26th-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 North Khorasan has become more connected. North Khorasan ranked 4th in 1975, 29th in 1976-1990, 31st in 1991-2000 and 26th in 2001-2014.
As of 2014, the city with the most disconnected street network in North Khorasan is Shirvan with an SNDi of 2.28, which is in the 40th to 60th percentile of disconnectedness. Conversely, the most connected city is Bojnurd with an SNDi of 1.63, which is relatively well-connected. See trends for these cities: Bojnurd, Shirvan
The level of street-network sprawl in the aggregate network in North Khorasan was at its lowest in 1991-2000. To get a sense of how the aggregate street network has changed in North Khorasan, we can consider three of its most populous cities: Bojnurd, Shirvan and Esfarayen. Out of the three cities, Shirvan and Esfarayen do not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Shirvan was at its lowest in 1976-1990. The level of street-network sprawl in the aggregate network in Esfarayen peaked in 1976-1990.
To date, North Khorasan is the 25th-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 North Khorasan has become more connected. North Khorasan ranked 4th in 1975, 13th in 1976-1990, 20th in 1991-2000 and 25th in 2001-2014.