Saint-Denis: region in France
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 Saint-Denis, France on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Saint-Denis as of 2014, the overall level of street-network sprawl is 5.28, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 5.21, nan, nan and 7.58. Data was not available in 1976-1990 and 1991-2000.
Quantity of street network construction: The street network in Saint-Denis spans a total of 1384 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 5.21, 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 5.21, 5.21, 5.21 and 5.28. Overall, the SNDi of the aggregate street network has risen: the street network in Saint-Denis has become more disconnected.
The level of street-network sprawl in new development in Saint-Denis followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Saint-Denis, we can consider two of its most populous cities: Saint-Denis and Le Port. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Saint-Denis followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Le Port followed a zig-zag trend with an overall increase.
How do development practices in Saint-Denis fare in comparison to others in France? Most recently in 2001-2014, street construction in Saint-Denis was the 4th-most disconnected out of the 20 regions in France. Saint-Denis ranked 3rd in 1975 and 4th in 2001-2014. There was no ranking in 1976-1990 and 1991-2000 due to unavailable data.
As of 2014, the city with the most disconnected street network in Saint-Denis is Saint-Denis with an SNDi of 4.73, which is highly disconnected. Conversely, the most connected city is Le Port with an SNDi of 3.74, which is highly disconnected. See trends for these cities: Le Port, Saint-Denis
The level of street-network sprawl in the aggregate network in Saint-Denis rose steadily. To get a sense of how the aggregate street network has changed in Saint-Denis, we can consider two of its most populous cities: Saint-Denis and Le Port. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Saint-Denis rose steadily. The level of street-network sprawl in the aggregate network in Le Port rose steadily.
To date, Saint-Denis is the 6th-most disconnected out of the 20 regions in France. Its position in the ranks since 1975 has fallen; relative to other regions in France, the street network in Saint-Denis has become more connected. Saint-Denis ranked 3rd in 1975, 4th in 1976-1990, 6th in 1991-2000 and 6th in 2001-2014.