Katsina: 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 Katsina, Nigeria on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Katsina as of 2014, the overall level of street-network sprawl is 1.53, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 0.62, 1.39, 1.98 and 1.78. Street construction in Katsina 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 Katsina spans a total of 13290 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 1.78, 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 0.62, 1.14, 1.28 and 1.53. Overall, the SNDi of the aggregate street network has risen: the street network in Katsina has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.51 points, but between 1991-2000 and 2001-2014, it rose by just 0.25.
The level of street-network sprawl in new development in Katsina peaked in 1991-2000. To get a sense of how street development has changed in Katsina, we can consider three of its most populous cities: Katsina, Daura and Funtua. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Katsina peaked in 1976-1990. The level of street-network sprawl in new development in Daura was at its lowest in 1991-2000. The level of street-network sprawl in new development in Funtua rose steadily.
How do development practices in Katsina fare in comparison to others in Nigeria? Most recently in 2001-2014, street construction in Katsina was the 35th-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 Katsina has become more disconnected. Katsina ranked 36th in 1975, 34th in 1976-1990, 35th in 1991-2000 and 35th in 2001-2014.
As of 2014, the city with the most disconnected street network in Katsina is Zango with an SNDi of 3.85, which is highly disconnected. Conversely, the most connected city is Kuwatau with an SNDi of -1.79, which is very well-connected. See trends for these cities: Kuwatau, Zango
The level of street-network sprawl in the aggregate network in Katsina rose steadily. To get a sense of how the aggregate street network has changed in Katsina, we can consider three of its most populous cities: Katsina, Daura and Funtua. Out of the three cities, Daura does not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Daura was at its lowest in 1991-2000.
To date, Katsina is the 35th-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 Katsina has become more disconnected. Katsina ranked 36th in 1975, 36th in 1976-1990, 36th in 1991-2000 and 35th in 2001-2014.