Jena: city in Thüringen, Germany
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 Jena, Germany on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Jena as of 2014, the overall level of street-network sprawl is 1.14, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 1.0, 1.45, 1.4 and 3.69. Disconnectivity in street construction in Jena follows a zig-zag trend. In 1975, street construction was most disconnected, while construction was most connected in 2001-2014.
Quantity of street network construction: The street network in Jena spans a total of 293 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 1.0, 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 1.0, 1.09, 1.09 and 1.14. Overall, the SNDi of the aggregate street network has risen: the street network in Jena has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.09 points, but between 1991-2000 and 2001-2014, it rose by just 0.04.
Jena and Thüringen do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Jena followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Thüringen peaked in 1991-2000.
How do development practices in Jena fare in comparison to others in Thüringen? Most recently in 2001-2014, street construction in Jena was the 2nd-most disconnected out of the 3 cities in Thüringen. Its position in the ranks since 1975 has not changed. Jena ranked 2nd in 1975, 3rd in 1976-1990, 3rd in 1991-2000 and 2nd in 2001-2014.
Jena and Germany do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Jena followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Germany peaked in 1991-2000.
How do development practices in Jena fare in comparison to others in Germany? Most recently in 2001-2014, street construction in Jena was the 11th-most disconnected out of the 87 cities in Germany. Its position in the ranks since 1975 has risen; relative to other cities in Germany, street construction in Jena has become more disconnected. Jena ranked 51st in 1975, 72nd in 1976-1990, 67th in 1991-2000 and 11th in 2001-2014.
Jena and Thüringen follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Jena is the 2nd-most disconnected out of the 3 cities in Thüringen. Its position in the ranks since 1975 has not changed. Jena ranked 2nd in 1975, 2nd in 1976-1990, 2nd in 1991-2000 and 2nd in 2001-2014.
Jena and Germany follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Jena is the 48th-most disconnected out of the 87 cities in Germany. Its position in the ranks since 1975 has risen; relative to other cities in Germany, the street network in Jena has become more disconnected. Jena ranked 51st in 1975, 49th in 1976-1990, 49th in 1991-2000 and 48th in 2001-2014.
As of 2015, Jena had a built-up area of 13.89 square kilometers, and a population of 91660 people.
These are some other cities with approximately the same population: