Al Marqab: region in Libya
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 Al Marqab, Libya on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Al Marqab as of 2014, the overall level of street-network sprawl is 3.48, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 2.96, 3.46, 4.63 and 5.29. In each period, new street development in Al Marqab steadily grows more disconnected than in the last.
Quantity of street network construction: The street network in Al Marqab spans a total of 3273 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 3.46, 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 2.96, 3.23, 3.36 and 3.48. Overall, the SNDi of the aggregate street network has risen: the street network in Al Marqab has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.27 points, but between 1991-2000 and 2001-2014, it rose by just 0.12.
The level of street-network sprawl in new development in Al Marqab rose steadily. To get a sense of how street development has changed in Al Marqab, we can consider three of its most populous cities: Qabilat alturki, Zliten and Khoms. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Qabilat alturki followed a zig-zag trend. The level of street-network sprawl in new development in Zliten followed a zig-zag trend. The level of street-network sprawl in new development in Khoms followed a zig-zag trend.
How do development practices in Al Marqab fare in comparison to others in Libya? Most recently in 2001-2014, street construction in Al Marqab was the 3rd-most disconnected out of the 11 regions in Libya. Its position in the ranks since 1975 has fallen; relative to other regions in Libya, street construction in Al Marqab has become more connected. Al Marqab ranked 2nd in 1975, 3rd in 1976-1990, 2nd in 1991-2000 and 3rd in 2001-2014.
As of 2014, the city with the most disconnected street network in Al Marqab is Qabilat alturki with an SNDi of 4.8, which is highly disconnected. Conversely, the most connected city is Khoms with an SNDi of 1.04, which is relatively well-connected. See trends for these cities: Khoms, Qabilat alturki
The level of street-network sprawl in the aggregate network in Al Marqab rose steadily. To get a sense of how the aggregate street network has changed in Al Marqab, we can consider three of its most populous cities: Qabilat alturki, Zliten and Khoms. Out of the three cities, Qabilat alturki and Zliten do not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Qabilat alturki followed a zig-zag trend with an overall increase. The level of street-network sprawl in the aggregate network in Zliten followed a zig-zag trend with an overall increase.
To date, Al Marqab is the 2nd-most disconnected out of the 11 regions in Libya. Its position in the ranks since 1975 has not changed. Al Marqab ranked 2nd in 1975, 1st in 1976-1990, 1st in 1991-2000 and 2nd in 2001-2014.