Oita: region in 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 Oita, Japan on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Oita as of 2014, the overall level of street-network sprawl is 2.42, which is in the 40th to 60th percentile of disconnectedness.
Trends in street network construction: The SNDis of street construction for the respective time periods are 2.09, 2.85, 3.46 and 3.52. In each period, new street development in Oita steadily grows more disconnected than in the last. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.76 points, but between 1991-2000 and 2001-2014, it rose by just 0.07.
Quantity of street network construction: The street network in Oita spans a total of 13431 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 2.09, 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 2.09, 2.28, 2.37 and 2.42. Overall, the SNDi of the aggregate street network has risen: the street network in Oita has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.19 points, but between 1991-2000 and 2001-2014, it rose by just 0.04.
The level of street-network sprawl in new development in Oita rose steadily. To get a sense of how street development has changed in Oita, we can consider two of its most populous cities: Ōita and Beppu. Out of the two cities, Beppu does not follow the same trend as the region. The level of street-network sprawl in new development in Beppu followed a zig-zag trend with an overall increase.
How do development practices in Oita fare in comparison to others in Japan? Most recently in 2001-2014, street construction in Oita was the 13th-most disconnected out of the 44 regions in Japan. Its position in the ranks since 1975 has fallen; relative to other regions in Japan, street construction in Oita has become more connected. Oita ranked 6th in 1975, 10th in 1976-1990, 11th in 1991-2000 and 13th in 2001-2014.
As of 2014, the city with the most disconnected street network in Oita is Beppu with an SNDi of 2.29, which is in the 40th to 60th percentile of disconnectedness. Conversely, the most connected city is Ōita with an SNDi of 1.96, which is relatively well-connected. See trends for these cities: Ōita, Beppu
The level of street-network sprawl in the aggregate network in Oita rose steadily. To get a sense of how the aggregate street network has changed in Oita, we can consider two of its most populous cities: Ōita and Beppu. Out of the two cities, Beppu does not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Beppu followed a zig-zag trend with an overall increase.
To date, Oita is the 4th-most disconnected out of the 44 regions in Japan. Its position in the ranks since 1975 has risen; relative to other regions in Japan, the street network in Oita has become more disconnected. Oita ranked 6th in 1975, 4th in 1976-1990, 4th in 1991-2000 and 4th in 2001-2014.