Boumerdès: region in Algeria
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 Boumerdès, Algeria on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Boumerdès as of 2014, the overall level of street-network sprawl is 4.31, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 4.21, 3.98, 4.4 and 4.98. The disconnectivity of new streets constructed in Boumerdès fell, then rose. In 1976-1990, new street layouts were the most connected.
Quantity of street network construction: The street network in Boumerdès spans a total of 3440 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 3.98, 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 4.21, 3.98, 4.05 and 4.31. The SNDi of the aggregate street network in fell at first, but Boumerdès has worsened in disconnectivity since 1990.
The level of street-network sprawl in new development in Boumerdès was at its lowest in 1976-1990. To get a sense of how street development has changed in Boumerdès, we can consider two of its most populous cities: Khemis El Khechna and Bordj Menaiel. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Khemis El Khechna followed a zig-zag trend. The level of street-network sprawl in new development in Bordj Menaiel followed a zig-zag trend.
How do development practices in Boumerdès fare in comparison to others in Algeria? Most recently in 2001-2014, street construction in Boumerdès was the 6th-most disconnected out of the 46 regions in Algeria. Its position in the ranks since 1975 has risen; relative to other regions in Algeria, street construction in Boumerdès has become more disconnected. Boumerdès ranked 9th in 1975, 4th in 1976-1990, 9th in 1991-2000 and 6th in 2001-2014.
As of 2014, the city with the most disconnected street network in Boumerdès is Khemis El Khechna with an SNDi of 4.33, which is highly disconnected. Conversely, the most connected city is Bordj Menaiel with an SNDi of 2.93, which is in the 40th to 60th percentile of disconnectedness. See trends for these cities: Bordj Menaiel, Khemis El Khechna
The level of street-network sprawl in the aggregate network in Boumerdès was at its lowest in 1976-1990. To get a sense of how the aggregate street network has changed in Boumerdès, we can consider two of its most populous cities: Khemis El Khechna and Bordj Menaiel. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Khemis El Khechna followed a zig-zag trend. The level of street-network sprawl in the aggregate network in Bordj Menaiel followed a zig-zag trend.
To date, Boumerdès is the 4th-most disconnected out of the 46 regions in Algeria. Its position in the ranks since 1975 has risen; relative to other regions in Algeria, the street network in Boumerdès has become more disconnected. Boumerdès ranked 9th in 1975, 5th in 1976-1990, 4th in 1991-2000 and 4th in 2001-2014.