Constantine: 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 Constantine, Algeria on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Constantine 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 3.28, 4.13, 3.81 and 3.54. Street construction in Constantine increased in disconnectivity initially but has since improved. The streets constructed in 1976-1990 were the most disconnected.
Quantity of street network construction: The street network in Constantine spans a total of 2925 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 4.13, 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 3.28, 4.03, 4.0 and 3.93. The aggregate street network in Constantine increased in disconnectivity initially,but the trend has turned around after 1990.
The level of street-network sprawl in new development in Constantine peaked in 1976-1990. To get a sense of how street development has changed in Constantine, we can consider three of its most populous cities: Constantine, El Khroub and Ali Mendjeli. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Constantine followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in El Khroub followed a zig-zag trend. The level of street-network sprawl in new development in Ali Mendjeli followed a zig-zag trend.
How do development practices in Constantine fare in comparison to others in Algeria? Most recently in 2001-2014, street construction in Constantine was the 14th-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 Constantine has become more disconnected. Constantine ranked 15th in 1975, 3rd in 1976-1990, 13th in 1991-2000 and 14th in 2001-2014.
As of 2014, the city with the most disconnected street network in Constantine is Constantine with an SNDi of 4.33, which is highly disconnected. Conversely, the most connected city is Ali Mendjeli with an SNDi of 1.92, which is relatively well-connected. See trends for these cities: Ali Mendjeli, Constantine
The level of street-network sprawl in the aggregate network in Constantine peaked in 1976-1990. To get a sense of how the aggregate street network has changed in Constantine, we can consider three of its most populous cities: Constantine, El Khroub and Ali Mendjeli. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Constantine rose steadily. The level of street-network sprawl in the aggregate network in El Khroub followed a zig-zag trend. The level of street-network sprawl in the aggregate network in Ali Mendjeli followed a zig-zag trend.
To date, Constantine is the 9th-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 Constantine has become more disconnected. Constantine ranked 15th in 1975, 4th in 1976-1990, 5th in 1991-2000 and 9th in 2001-2014.