Ogun: region in Nigeria
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 Ogun, Nigeria on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Ogun as of 2014, the overall level of street-network sprawl is 4.49, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 2.67, 4.12, 4.57 and 4.98. In each period, new street development in Ogun steadily grows more disconnected than in the last. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 1.46 points, but between 1991-2000 and 2001-2014, it rose by just 0.42.
Quantity of street network construction: The street network in Ogun spans a total of 19167 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 4.98, which is highly disconnected.
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 2.67, 3.73, 4.06 and 4.49. Overall, the SNDi of the aggregate street network has risen: the street network in Ogun has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 1.06 points, but between 1991-2000 and 2001-2014, it rose by just 0.43.
The level of street-network sprawl in new development in Ogun rose steadily. To get a sense of how street development has changed in Ogun, we can consider three of its most populous cities: Abeokuta, Ijebu-Ode and Ogunrun-Ori. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Abeokuta was at its lowest in 1991-2000. The level of street-network sprawl in new development in Ijebu-Ode peaked in 1991-2000. The level of street-network sprawl in new development in Ogunrun-Ori followed a zig-zag trend.
How do development practices in Ogun fare in comparison to others in Nigeria? Most recently in 2001-2014, street construction in Ogun was the 9th-most disconnected out of the 37 regions in Nigeria. Its position in the ranks since 1975 has risen; relative to other regions in Nigeria, street construction in Ogun has become more disconnected. Ogun ranked 16th in 1975, 10th in 1976-1990, 12th in 1991-2000 and 9th in 2001-2014.
As of 2014, the city with the most disconnected street network in Ogun is Ogunrun-Ori with an SNDi of 5.52, which is highly disconnected. Conversely, the most connected city is Meko with an SNDi of 0.68, which is relatively well-connected. See trends for these cities: Meko, Ogunrun-Ori
The level of street-network sprawl in the aggregate network in Ogun rose steadily. To get a sense of how the aggregate street network has changed in Ogun, we can consider three of its most populous cities: Abeokuta, Ijebu-Ode and Ogunrun-Ori. Out of the three cities, Abeokuta and Ogunrun-Ori do not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Abeokuta was at its lowest in 1991-2000. The level of street-network sprawl in the aggregate network in Ogunrun-Ori followed a zig-zag trend.
To date, Ogun is the 9th-most disconnected out of the 37 regions in Nigeria. Its position in the ranks since 1975 has risen; relative to other regions in Nigeria, the street network in Ogun has become more disconnected. Ogun ranked 16th in 1975, 11th in 1976-1990, 9th in 1991-2000 and 9th in 2001-2014.