Boulogne-sur-Mer: city in Hauts-de-France, 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 Boulogne-sur-Mer, France on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Boulogne-sur-Mer as of 2014, the overall level of street-network sprawl is 2.0, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 1.94, 3.16, 4.02 and 3.97. Street construction in Boulogne-sur-Mer increased in disconnectivity initially but has since improved. The streets constructed in 1991-2000 were the most disconnected.
Quantity of street network construction: The street network in Boulogne-sur-Mer spans a total of 255 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 1.94, which is relatively well-connected.
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 1.94, 1.96, 1.99 and 2.0. Overall, the SNDi of the aggregate street network has risen: the street network in Boulogne-sur-Mer has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.02 points, but between 1991-2000 and 2001-2014, it rose by just 0.01.
Boulogne-sur-Mer and Hauts-de-France do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Boulogne-sur-Mer peaked in 1991-2000, while the SNDi of street constructions in Hauts-de-France rose steadily.
How do development practices in Boulogne-sur-Mer fare in comparison to others in Hauts-de-France? Most recently in 2001-2014, street construction in Boulogne-sur-Mer was the 5th-most disconnected out of the 10 cities in Hauts-de-France. Its position in the ranks since 1975 has risen; relative to other cities in Hauts-de-France, street construction in Boulogne-sur-Mer has become more disconnected. Boulogne-sur-Mer ranked 6th in 1975, 6th in 1976-1990, 3rd in 1991-2000 and 5th in 2001-2014.
Boulogne-sur-Mer and France do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Boulogne-sur-Mer peaked in 1991-2000, while the SNDi of street constructions in France rose steadily.
How do development practices in Boulogne-sur-Mer fare in comparison to others in France? Most recently in 2001-2014, street construction in Boulogne-sur-Mer was the 29th-most disconnected out of the 76 cities in France. Its position in the ranks since 1975 has risen; relative to other cities in France, street construction in Boulogne-sur-Mer has become more disconnected. Boulogne-sur-Mer ranked 41st in 1975, 40th in 1976-1990, 17th in 1991-2000 and 29th in 2001-2014.
Boulogne-sur-Mer and Hauts-de-France follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Boulogne-sur-Mer is the 6th-most disconnected out of the 10 cities in Hauts-de-France. Its position in the ranks since 1975 has not changed. Boulogne-sur-Mer ranked 6th in 1975, 6th in 1976-1990, 6th in 1991-2000 and 6th in 2001-2014.
Boulogne-sur-Mer and France follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Boulogne-sur-Mer is the 50th-most disconnected out of the 76 cities in France. Its position in the ranks since 1975 has fallen; relative to other cities in France, the street network in Boulogne-sur-Mer has become more connected. Boulogne-sur-Mer ranked 41st in 1975, 50th in 1976-1990, 50th in 1991-2000 and 50th in 2001-2014.
As of 2015, Boulogne-sur-Mer had a built-up area of 12.46 square kilometers, and a population of 75659 people.
These are some other cities with approximately the same population: