Salka: city in Niger, 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 Salka, Nigeria on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Salka as of 2014, the overall level of street-network sprawl is 0.73, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 0.71, 1.57, 0.72 and 0.5. Street construction in Salka increased in disconnectivity initially but has since improved. The streets constructed in 1976-1990 were the most disconnected.
Quantity of street network construction: The street network in Salka spans a total of 71 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 0.5, 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 0.71, 1.03, 0.89 and 0.73. The aggregate street network in Salka increased in disconnectivity initially,but the trend has turned around after 1990.
Salka and Niger do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Salka peaked in 1976-1990, while the SNDi of street constructions in Niger rose steadily.
How do development practices in Salka fare in comparison to others in Niger? Most recently in 2001-2014, street construction in Salka was the 12th-most disconnected out of the 13 cities in Niger. Its position in the ranks since 1975 has fallen; relative to other cities in Niger, street construction in Salka has become more connected. Salka ranked 7th in 1975, 8th in 1976-1990, 9th in 1991-2000 and 12th in 2001-2014.
Salka and Nigeria do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Salka peaked in 1976-1990, while the SNDi of street constructions in Nigeria peaked in 1991-2000.
How do development practices in Salka fare in comparison to others in Nigeria? Most recently in 2001-2014, street construction in Salka was the 320th-most disconnected out of the 411 cities in Nigeria. Its position in the ranks since 1975 has fallen; relative to other cities in Nigeria, street construction in Salka has become more connected. Salka ranked 161st in 1975, 191st in 1976-1990, 211th in 1991-2000 and 320th in 2001-2014.
Salka and Niger do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Salka peaked in 1976-1990, while the SNDi of street constructions in Niger rose steadily.
To date, Salka is the 11th-most disconnected out of the 13 cities in Niger. Its position in the ranks since 1975 has fallen; relative to other cities in Niger, the street network in Salka has become more connected. Salka ranked 7th in 1975, 8th in 1976-1990, 10th in 1991-2000 and 11th in 2001-2014.
Salka and Nigeria do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Salka peaked in 1976-1990, while the SNDi of street constructions in Nigeria rose steadily.
To date, Salka is the 297th-most disconnected out of the 411 cities in Nigeria. Its position in the ranks since 1975 has fallen; relative to other cities in Nigeria, the street network in Salka has become more connected. Salka ranked 161st in 1975, 223rd in 1976-1990, 246th in 1991-2000 and 297th in 2001-2014.
As of 2015, Salka had a built-up area of 1.08 square kilometers, and a population of 56157 people.
These are some other cities with approximately the same population: