Diyarbakir: 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 Diyarbakir, Turkey on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Diyarbakir as of 2014, the overall level of street-network sprawl is 2.8, 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 1.8, 3.37, 3.04 and 3.49. Disconnectivity in street construction in Diyarbakir follows a zig-zag trend. In 1975, street construction was most disconnected, while construction was most connected in 2001-2014.
Quantity of street network construction: The street network in Diyarbakir spans a total of 6226 kilometers. The period with the greatest volume of street construction was 1976-1990. These roads have an SNDi of 3.37, 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 1.8, 2.58, 2.66 and 2.8. Overall, the SNDi of the aggregate street network has risen: the street network in Diyarbakir has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.79 points, but between 1991-2000 and 2001-2014, it rose by just 0.14.
The level of street-network sprawl in new development in Diyarbakir followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Diyarbakir, we can consider three of its most populous cities: Diyarbakir, Geyiktepe and Ergani. Out of the three cities, Diyarbakir and Geyiktepe do not follow the same trend as the region. The level of street-network sprawl in new development in Diyarbakir peaked in 1976-1990. The level of street-network sprawl in new development in Geyiktepe followed a zig-zag trend.
How do development practices in Diyarbakir fare in comparison to others in Turkey? Most recently in 2001-2014, street construction in Diyarbakir was the 33rd-most disconnected out of the 71 regions in Turkey. Its position in the ranks since 1975 has risen; relative to other regions in Turkey, street construction in Diyarbakir has become more disconnected. Diyarbakir ranked 46th in 1975, 13th in 1976-1990, 29th in 1991-2000 and 33rd in 2001-2014.
As of 2014, the city with the most disconnected street network in Diyarbakir is Geyiktepe with an SNDi of 4.73, which is highly disconnected. Conversely, the most connected city is Ergani with an SNDi of 1.07, which is relatively well-connected. See trends for these cities: Ergani, Geyiktepe
The level of street-network sprawl in the aggregate network in Diyarbakir rose steadily. To get a sense of how the aggregate street network has changed in Diyarbakir, we can consider three of its most populous cities: Diyarbakir, Geyiktepe and Ergani. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Diyarbakir peaked in 1991-2000. The level of street-network sprawl in the aggregate network in Geyiktepe followed a zig-zag trend. The level of street-network sprawl in the aggregate network in Ergani followed a zig-zag trend with an overall increase.
To date, Diyarbakir is the 25th-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 Diyarbakir has become more disconnected. Diyarbakir ranked 46th in 1975, 23rd in 1976-1990, 24th in 1991-2000 and 25th in 2001-2014.