Iwakuni: city in Yamaguchi, 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 Iwakuni, Japan on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Iwakuni as of 2014, the overall level of street-network sprawl is 1.89, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 1.78, 6.31, 8.61 and nan. Data was not available in 2001-2014.
Quantity of street network construction: The street network in Iwakuni spans a total of 384 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 1.78, 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 1.78, 1.86, 1.89 and 1.89. Overall, the SNDi of the aggregate street network has risen: the street network in Iwakuni has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.07 points, but between 1991-2000 and 2001-2014, it rose by just 0.0.
Iwakuni and Yamaguchi do not follow the same trend in the disconnectivity of their street network constructions. There was not enough data from the city, while the SNDi of street constructions in Yamaguchi followed a zig-zag trend with an overall increase.
How do development practices in Iwakuni fare in comparison to others in Yamaguchi? out of the 4 cities in Yamaguchi. Its position in the ranks since 1975 has risen; relative to other cities in Yamaguchi, street construction in Iwakuni has become more disconnected. Iwakuni ranked 3rd in 1975, 1st in 1976-1990 and 1st in 1991-2000. There was no ranking in 2001-2014 due to unavailable data.
Iwakuni and Japan do not follow the same trend in the disconnectivity of their street network constructions. There was not enough data from the city, while the SNDi of street constructions in Japan peaked in 1991-2000.
How do development practices in Iwakuni fare in comparison to others in Japan? 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 Iwakuni has become more disconnected. Iwakuni ranked 36th in 1975, 2nd in 1976-1990 and 2nd in 1991-2000. There was no ranking in 2001-2014 due to unavailable data.
Iwakuni and Yamaguchi follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Iwakuni is the 3rd-most disconnected out of the 4 cities in Yamaguchi. Its position in the ranks since 1975 has not changed. Iwakuni ranked 3rd in 1975, 3rd in 1976-1990, 3rd in 1991-2000 and 3rd in 2001-2014.
Iwakuni and Japan follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Iwakuni is the 34th-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 Iwakuni has become more disconnected. Iwakuni ranked 36th in 1975, 37th in 1976-1990, 35th in 1991-2000 and 34th in 2001-2014.
As of 2015, Iwakuni had a built-up area of 25.84 square kilometers, and a population of 99433 people.
These are some other cities with approximately the same population: