Dihok: region in Iraq
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 Dihok, Iraq on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Dihok as of 2014, the overall level of street-network sprawl is 2.73, 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 2.46, 1.95, 3.43 and 3.19. Disconnectivity in street construction in Dihok follows a zig-zag trend. In 1976-1990, street construction was most disconnected, while construction was most connected in 1991-2000.
Quantity of street network construction: The street network in Dihok spans a total of 3852 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 3.19, 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 2.46, 2.07, 2.32 and 2.73. The SNDi of the aggregate street network in fell at first, but Dihok has worsened in disconnectivity since 1990.
The level of street-network sprawl in new development in Dihok followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Dihok, we can consider three of its most populous cities: Duhok, Zakho and Zawa. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Duhok rose steadily. The level of street-network sprawl in new development in Zakho was at its lowest in 1976-1990. The level of street-network sprawl in new development in Zawa followed a zig-zag trend.
How do development practices in Dihok fare in comparison to others in Iraq? Most recently in 2001-2014, street construction in Dihok was the 5th-most disconnected out of the 18 regions in Iraq. Its position in the ranks since 1975 has risen; relative to other regions in Iraq, street construction in Dihok has become more disconnected. Dihok ranked 8th in 1975, 8th in 1976-1990, 2nd in 1991-2000 and 5th in 2001-2014.
As of 2014, the city with the most disconnected street network in Dihok is Duhok with an SNDi of 1.9, which is relatively well-connected. Conversely, the most connected city is Zawa with an SNDi of 1.45, which is relatively well-connected. See trends for these cities: Zawa, Duhok
The level of street-network sprawl in the aggregate network in Dihok was at its lowest in 1976-1990. To get a sense of how the aggregate street network has changed in Dihok, we can consider three of its most populous cities: Duhok, Zakho and Zawa. Out of the three cities, Duhok and Zawa do not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Duhok rose steadily. The level of street-network sprawl in the aggregate network in Zawa followed a zig-zag trend.
To date, Dihok is the 3rd-most disconnected out of the 18 regions in Iraq. Its position in the ranks since 1975 has risen; relative to other regions in Iraq, the street network in Dihok has become more disconnected. Dihok ranked 8th in 1975, 7th in 1976-1990, 4th in 1991-2000 and 3rd in 2001-2014.