Alesa: city in Rivers, 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 Alesa, Nigeria on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Alesa as of 2014, the overall level of street-network sprawl is 2.81, 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 0.18, 2.21, 4.46 and 3.53. Street construction in Alesa 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 Alesa spans a total of 64 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 2.21, 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 0.18, 2.2, 2.62 and 2.81. Overall, the SNDi of the aggregate street network has risen: the street network in Alesa has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 2.02 points, but between 1991-2000 and 2001-2014, it rose by just 0.19.
Alesa and Rivers do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Alesa peaked in 1991-2000, while the SNDi of street constructions in Rivers rose steadily.
How do development practices in Alesa fare in comparison to others in Rivers? Most recently in 2001-2014, street construction in Alesa was the 10th-most disconnected out of the 15 cities in Rivers. Its position in the ranks since 1975 has risen; relative to other cities in Rivers, street construction in Alesa has become more disconnected. Alesa ranked 13th in 1975, 11th in 1976-1990, 8th in 1991-2000 and 10th in 2001-2014.
Alesa and Nigeria follow the same trend in the disconnectivity of their street network constructions. The SNDi for both of these peaked in 1991-2000.
How do development practices in Alesa fare in comparison to others in Nigeria? Most recently in 2001-2014, street construction in Alesa was the 146th-most disconnected out of the 411 cities in Nigeria. Its position in the ranks since 1975 has risen; relative to other cities in Nigeria, street construction in Alesa has become more disconnected. Alesa ranked 198th in 1975, 155th in 1976-1990, 68th in 1991-2000 and 146th in 2001-2014.
Alesa and Rivers follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Alesa is the 10th-most disconnected out of the 15 cities in Rivers. Its position in the ranks since 1975 has risen; relative to other cities in Rivers, the street network in Alesa has become more disconnected. Alesa ranked 13th in 1975, 11th in 1976-1990, 11th in 1991-2000 and 10th in 2001-2014.
Alesa and Nigeria follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Alesa is the 140th-most disconnected out of the 411 cities in Nigeria. Its position in the ranks since 1975 has risen; relative to other cities in Nigeria, the street network in Alesa has become more disconnected. Alesa ranked 198th in 1975, 139th in 1976-1990, 119th in 1991-2000 and 140th in 2001-2014.
As of 2015, Alesa had a built-up area of 0.52 square kilometers, and a population of 112851 people.
These are some other cities with approximately the same population: