Sirnak: region in Turkey
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 Sirnak, Turkey on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Sirnak as of 2014, the overall level of street-network sprawl is 3.93, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 3.62, 3.31, 3.84 and 4.77. The disconnectivity of new streets constructed in Sirnak fell, then rose. In 1976-1990, new street layouts were the most connected.
Quantity of street network construction: The street network in Sirnak spans a total of 2113 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 4.77, 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 3.62, 3.46, 3.57 and 3.93. The SNDi of the aggregate street network in fell at first, but Sirnak has worsened in disconnectivity since 1990.
The level of street-network sprawl in new development in Sirnak was at its lowest in 1976-1990. To get a sense of how street development has changed in Sirnak, we can consider three of its most populous cities: Silopi, Cizre and Şırnak. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Silopi followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Cizre peaked in 1991-2000. The level of street-network sprawl in new development in Şırnak followed a zig-zag trend.
How do development practices in Sirnak fare in comparison to others in Turkey? Most recently in 2001-2014, street construction in Sirnak was the 16th-most disconnected out of the 71 regions in Turkey. Its position in the ranks since 1975 has fallen; relative to other regions in Turkey, street construction in Sirnak has become more connected. Sirnak ranked 12th in 1975, 14th in 1976-1990, 17th in 1991-2000 and 16th in 2001-2014.
As of 2014, the city with the most disconnected street network in Sirnak is Şırnak with an SNDi of 5.7, which is highly disconnected. Conversely, the most connected city is Silopi with an SNDi of 1.78, which is relatively well-connected. See trends for these cities: Silopi, Şırnak
The level of street-network sprawl in the aggregate network in Sirnak was at its lowest in 1976-1990. To get a sense of how the aggregate street network has changed in Sirnak, we can consider three of its most populous cities: Silopi, Cizre and Şırnak. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Silopi followed a zig-zag trend with an overall increase. The level of street-network sprawl in the aggregate network in Cizre rose steadily. The level of street-network sprawl in the aggregate network in Şırnak followed a zig-zag trend.
To date, Sirnak is the 9th-most disconnected out of the 71 regions in Turkey. Its position in the ranks since 1975 has risen; relative to other regions in Turkey, the street network in Sirnak has become more disconnected. Sirnak ranked 12th in 1975, 10th in 1976-1990, 11th in 1991-2000 and 9th in 2001-2014.