Umuahia: city in Abia, 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 Umuahia, Nigeria on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Umuahia as of 2014, the overall level of street-network sprawl is 3.24, 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 0.6, 3.2, 2.94 and 3.91. Disconnectivity in street construction in Umuahia follows a zig-zag trend. In 1975, street construction was most disconnected, while construction was most connected in 2001-2014.
Quantity of street network construction: The street network in Umuahia spans a total of 317 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 3.2, which is in the 40th to 60th percentile of disconnectedness.
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 0.6, 2.97, 2.97 and 3.24. Disconnectivity in Umuahia's street network follows a zig-zag trend. In 1975, the city was most disconnected; while it was most connected in 2001-2014.
Umuahia and Abia do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Umuahia followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Abia rose steadily.
How do development practices in Umuahia fare in comparison to others in Abia? Most recently in 2001-2014, street construction in Umuahia was the 7th-most disconnected out of the 13 cities in Abia. Its position in the ranks since 1975 has fallen; relative to other cities in Abia, street construction in Umuahia has become more connected. Umuahia ranked 4th in 1975, 8th in 1976-1990, 6th in 1991-2000 and 7th in 2001-2014.
Umuahia and Nigeria do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Umuahia followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Nigeria peaked in 1991-2000.
How do development practices in Umuahia fare in comparison to others in Nigeria? Most recently in 2001-2014, street construction in Umuahia was the 129th-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 Umuahia has become more disconnected. Umuahia ranked 171st in 1975, 94th in 1976-1990, 130th in 1991-2000 and 129th in 2001-2014.
Umuahia and Abia do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Umuahia followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Abia rose steadily.
To date, Umuahia is the 8th-most disconnected out of the 13 cities in Abia. Its position in the ranks since 1975 has fallen; relative to other cities in Abia, the street network in Umuahia has become more connected. Umuahia ranked 4th in 1975, 8th in 1976-1990, 8th in 1991-2000 and 8th in 2001-2014.
Umuahia and Nigeria do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Umuahia followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Nigeria rose steadily.
To date, Umuahia is the 114th-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 Umuahia has become more disconnected. Umuahia ranked 171st in 1975, 83rd in 1976-1990, 93rd in 1991-2000 and 114th in 2001-2014.
As of 2015, Umuahia had a built-up area of 6.66 square kilometers, and a population of 206686 people.
These are some other cities with approximately the same population: