Nariño: region in Colombia
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 Nariño, Colombia on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Nariño as of 2014, the overall level of street-network sprawl is 3.96, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 3.89, nan, 6.47 and 4.43. Data was not available in 1976-1990.
Quantity of street network construction: The street network in Nariño spans a total of 4404 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 3.89, 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 3.89, 3.89, 3.97 and 3.96. Disconnectivity in Nariño's street network follows a zig-zag trend. In 1975, the region was most disconnected; while it was most connected in 1991-2000.
The level of street-network sprawl in new development in Nariño followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Nariño, we can consider three of its most populous cities: Pasto, Tumaco and Ipiales. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Pasto followed a zig-zag trend. The level of street-network sprawl in new development in Tumaco followed a zig-zag trend. The level of street-network sprawl in new development in Ipiales followed a zig-zag trend with an overall increase.
How do development practices in Nariño fare in comparison to others in Colombia? Most recently in 2001-2014, street construction in Nariño was the 15th-most disconnected out of the 28 regions in Colombia. Its position in the ranks since 1975 has fallen; relative to other regions in Colombia, street construction in Nariño has become more connected. Nariño ranked 6th in 1975, 3rd in 1991-2000 and 15th in 2001-2014. There was no ranking in 1976-1990 due to unavailable data.
As of 2014, the city with the most disconnected street network in Nariño is Pasto with an SNDi of 1.99, which is relatively well-connected. Conversely, the most connected city is Ipiales with an SNDi of 0.7, which is relatively well-connected. See trends for these cities: Ipiales, Pasto
The level of street-network sprawl in the aggregate network in Nariño followed a zig-zag trend with an overall increase. To get a sense of how the aggregate street network has changed in Nariño, we can consider three of its most populous cities: Pasto, Tumaco and Ipiales. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Pasto rose steadily. The level of street-network sprawl in the aggregate network in Tumaco rose steadily. The level of street-network sprawl in the aggregate network in Ipiales rose steadily.
To date, Nariño is the 7th-most disconnected out of the 28 regions in Colombia. Its position in the ranks since 1975 has fallen; relative to other regions in Colombia, the street network in Nariño has become more connected. Nariño ranked 6th in 1975, 6th in 1976-1990, 6th in 1991-2000 and 7th in 2001-2014.