Iizuka: city in Fukuoka, Japan
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 Iizuka, Japan on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Iizuka as of 2014, the overall level of street-network sprawl is 1.93, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 1.64, 2.43, 2.39 and 3.43. Disconnectivity in street construction in Iizuka 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 Iizuka spans a total of 603 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 1.64, 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 1.64, 1.91, 1.92 and 1.93. Overall, the SNDi of the aggregate street network has risen: the street network in Iizuka has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.28 points, but between 1991-2000 and 2001-2014, it rose by just 0.02.
Iizuka and Fukuoka do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Iizuka followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Fukuoka rose steadily.
How do development practices in Iizuka fare in comparison to others in Fukuoka? Most recently in 2001-2014, street construction in Iizuka was the 2nd-most disconnected out of the 6 cities in Fukuoka. Its position in the ranks since 1975 has fallen; relative to other cities in Fukuoka, street construction in Iizuka has become more connected. Iizuka ranked 1st in 1975, 2nd in 1976-1990, 3rd in 1991-2000 and 2nd in 2001-2014.
Iizuka and Japan do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Iizuka followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Japan peaked in 1991-2000.
How do development practices in Iizuka fare in comparison to others in Japan? Most recently in 2001-2014, street construction in Iizuka was the 17th-most disconnected out of the 109 cities in Japan. Its position in the ranks since 1975 has risen; relative to other cities in Japan, street construction in Iizuka has become more disconnected. Iizuka ranked 42nd in 1975, 31st in 1976-1990, 51st in 1991-2000 and 17th in 2001-2014.
Iizuka and Fukuoka follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Iizuka is the 1st-most disconnected out of the 6 cities in Fukuoka. Its position in the ranks since 1975 has not changed. Iizuka ranked 1st in 1975, 1st in 1976-1990, 1st in 1991-2000 and 1st in 2001-2014.
Iizuka and Japan follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Iizuka is the 32nd-most disconnected out of the 109 cities in Japan. Its position in the ranks since 1975 has risen; relative to other cities in Japan, the street network in Iizuka has become more disconnected. Iizuka ranked 42nd in 1975, 32nd in 1976-1990, 32nd in 1991-2000 and 32nd in 2001-2014.
As of 2015, Iizuka had a built-up area of 23.55 square kilometers, and a population of 75890 people.
These are some other cities with approximately the same population: