Amazonas: region in Brazil
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 Amazonas, Brazil on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Amazonas as of 2014, the overall level of street-network sprawl is 5.03, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 4.61, nan, 5.8 and 7.17. Data was not available in 1976-1990.
Quantity of street network construction: The street network in Amazonas spans a total of 14089 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 4.61, 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 4.61, 4.61, 4.81 and 5.03. Overall, the SNDi of the aggregate street network has risen: the street network in Amazonas has become more disconnected.
The level of street-network sprawl in new development in Amazonas followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Amazonas, we can consider three of its most populous cities: Manaus, Leticia and Parintins. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Manaus followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Leticia followed a zig-zag trend. The level of street-network sprawl in new development in Parintins followed a zig-zag trend with an overall increase.
How do development practices in Amazonas fare in comparison to others in Brazil? Most recently in 2001-2014, street construction in Amazonas was the 1st-most disconnected out of the 29 regions in Brazil. Its position in the ranks since 1975 has not changed. Amazonas ranked 1st in 1975, 1st in 1991-2000 and 1st 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 Amazonas is Coari with an SNDi of 4.26, which is highly disconnected. Conversely, the most connected city is Parintins with an SNDi of 1.18, which is relatively well-connected. See trends for these cities: Parintins, Coari
The level of street-network sprawl in the aggregate network in Amazonas rose steadily. To get a sense of how the aggregate street network has changed in Amazonas, we can consider three of its most populous cities: Manaus, Leticia and Parintins. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Manaus rose steadily. The level of street-network sprawl in the aggregate network in Leticia fell steadily. The level of street-network sprawl in the aggregate network in Parintins rose steadily.
To date, Amazonas is the 1st-most disconnected out of the 29 regions in Brazil. Its position in the ranks since 1975 has not changed. Amazonas ranked 1st in 1975, 1st in 1976-1990, 1st in 1991-2000 and 1st in 2001-2014.