Guinea
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 Guinea on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Guinea as of 2014, the overall level of street-network sprawl is 4.42, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 2.89, 3.98, 4.43 and 5.71. In each period, new street development in Guinea steadily grows more disconnected than in the last.
Quantity of street network construction: The street network in Guinea spans a total of 42141 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 5.71, 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 2.89, 3.49, 3.81 and 4.42. Overall, the SNDi of the aggregate street network has risen: the street network in Guinea has become more disconnected.
The level of street-network sprawl in new development in Guinea rose steadily. To get a sense of how street development has changed in Guinea, we can consider three of its most populous regions: Conakry, Kankan and Nzérékoré. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Conakry followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Kankan followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Nzérékoré followed a zig-zag trend with an overall increase.
How do development practices in Guinea fare in comparison to others in the world? Most recently in 2001-2014, street construction in Guinea was the 39th-most disconnected out of the 155 countries in the world. Its position in the ranks since 1975 has risen; relative to other countries in the world, street construction in Guinea has become more disconnected. Guinea ranked 73rd in 1975, 48th in 1976-1990, 65th in 1991-2000 and 39th in 2001-2014.
The largest city in Guinea is Conakry, with a population of 2469800 people. Taking into account the entire (i.e. aggregate) street network in Conakry as of 2014, the overall level of street-network sprawl is 3.18, which is in the 40th to 60th percentile of disconnectedness. The level of street-network sprawl in new development in Conakry followed a zig-zag trend with an overall increase.
As of 2014, the city with the most disconnected street network in Guinea is Kindia with an SNDi of 4.14, which is highly disconnected. Conversely, the most connected city is Dinguiraye with an SNDi of -0.63, which is very well-connected. See trends for these cities: Dinguiraye, Kindia
The level of street-network sprawl in the aggregate network in Guinea rose steadily. To get a sense of how the aggregate street network has changed in Guinea, we can consider three of its most populous regions: Conakry, Kankan and Nzérékoré. Disconnectivity in the most populous cities in Guinea follow the same country trend.
To date, Guinea is the 42nd-most disconnected out of the 155 countries in the world. Its position in the ranks since 1975 has risen; relative to other countries in the world, the street network in Guinea has become more disconnected. Guinea ranked 73rd in 1975, 61st in 1976-1990, 54th in 1991-2000 and 42nd in 2001-2014.
The largest city in Guinea is Conakry, with a population of 2469800 people. Taking into account the entire (i.e. aggregate) street network in Conakry as of 2014, the overall level of street-network sprawl is 3.18, which is in the 40th to 60th percentile of disconnectedness. The level of street-network sprawl in the aggregate network in Conakry rose steadily.