Miyazaki: 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 Miyazaki, Japan on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Miyazaki as of 2014, the overall level of street-network sprawl is 1.62, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 1.3, 1.96, 2.8 and 2.55. Street construction in Miyazaki 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 Miyazaki spans a total of 15869 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 1.3, 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 1.3, 1.4, 1.52 and 1.62. Overall, the SNDi of the aggregate street network has risen: the street network in Miyazaki has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.1 points, but between 1991-2000 and 2001-2014, it rose by just 0.09.
The level of street-network sprawl in new development in Miyazaki peaked in 1991-2000. To get a sense of how street development has changed in Miyazaki, we can consider three of its most populous cities: Miyazaki, Nobeoka and Miyakonojo. Out of the three cities, Miyazaki and Nobeoka do not follow the same trend as the region. The level of street-network sprawl in new development in Miyazaki peaked in 1976-1990. The level of street-network sprawl in new development in Nobeoka followed a zig-zag trend with an overall increase.
How do development practices in Miyazaki fare in comparison to others in Japan? Most recently in 2001-2014, street construction in Miyazaki was the 28th-most disconnected out of the 44 regions in Japan. Its position in the ranks since 1975 has risen; relative to other regions in Japan, street construction in Miyazaki has become more disconnected. Miyazaki ranked 29th in 1975, 26th in 1976-1990, 23rd in 1991-2000 and 28th in 2001-2014.
As of 2014, the city with the most disconnected street network in Miyazaki is Nobeoka with an SNDi of 2.08, which is relatively well-connected. Conversely, the most connected city is Miyakonojo with an SNDi of 0.1, which is very well-connected. See trends for these cities: Miyakonojo, Nobeoka
The level of street-network sprawl in the aggregate network in Miyazaki rose steadily. To get a sense of how the aggregate street network has changed in Miyazaki, we can consider three of its most populous cities: Miyazaki, Nobeoka and Miyakonojo. Out of the three cities, Nobeoka and Miyakonojo do not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Nobeoka rose steadily. The level of street-network sprawl in the aggregate network in Miyakonojo peaked in 1991-2000.
To date, Miyazaki is the 23rd-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 Miyazaki has become more disconnected. Miyazaki ranked 29th in 1975, 29th in 1976-1990, 26th in 1991-2000 and 23rd in 2001-2014.