Southern: region in Zambia
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 Southern, Zambia on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Southern as of 2014, the overall level of street-network sprawl is 3.57, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 3.2, 2.46, 4.27 and 3.91. Disconnectivity in street construction in Southern follows a zig-zag trend. In 1976-1990, street construction was most disconnected, while construction was most connected in 1991-2000.
Quantity of street network construction: The street network in Southern spans a total of 4638 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 3.91, 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 3.2, 2.63, 3.21 and 3.57. The SNDi of the aggregate street network in fell at first, but Southern has worsened in disconnectivity since 1990.
The level of street-network sprawl in new development in Southern followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Southern, we can consider three of its most populous cities: Livingstone, Choma and Monze. Out of the three cities, Livingstone and Monze do not follow the same trend as the region. The level of street-network sprawl in new development in Livingstone rose steadily. The level of street-network sprawl in new development in Monze was at its lowest in 1976-1990.
How do development practices in Southern fare in comparison to others in Zambia? Most recently in 2001-2014, street construction in Southern was the 5th-most disconnected out of the 10 regions in Zambia. Its position in the ranks since 1975 has fallen; relative to other regions in Zambia, street construction in Southern has become more connected. Southern ranked 1st in 1975, 7th in 1976-1990, 3rd in 1991-2000 and 5th in 2001-2014.
As of 2014, the city with the most disconnected street network in Southern is Itezhi-Tezhi with an SNDi of 6.02, which is highly disconnected. Conversely, the most connected city is Monze with an SNDi of 1.24, which is relatively well-connected. See trends for these cities: Monze, Itezhi-Tezhi
The level of street-network sprawl in the aggregate network in Southern was at its lowest in 1976-1990. To get a sense of how the aggregate street network has changed in Southern, we can consider three of its most populous cities: Livingstone, Choma and Monze. Out of the three cities, Livingstone does not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Livingstone rose steadily.
To date, Southern is the 2nd-most disconnected out of the 10 regions in Zambia. Its position in the ranks since 1975 has fallen; relative to other regions in Zambia, the street network in Southern has become more connected. Southern ranked 1st in 1975, 4th in 1976-1990, 3rd in 1991-2000 and 2nd in 2001-2014.