Bahia: 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 Bahia, Brazil on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Bahia as of 2014, the overall level of street-network sprawl is 2.98, which is in the 40th to 60th percentile of disconnectedness.
Trends in street network construction: The SNDis of street construction for the respective time periods are 2.8, 2.14, 3.14 and 4.13. The disconnectivity of new streets constructed in Bahia fell, then rose. In 1976-1990, new street layouts were the most connected.
Quantity of street network construction: The street network in Bahia spans a total of 61872 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 2.8, which is in the 40th to 60th percentile of disconnectedness.
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 2.8, 2.67, 2.75 and 2.98. The SNDi of the aggregate street network in fell at first, but Bahia has worsened in disconnectivity since 1990.
The level of street-network sprawl in new development in Bahia was at its lowest in 1976-1990. To get a sense of how street development has changed in Bahia, we can consider three of its most populous cities: Salvador, Feira de Santana and Vitória da Conquista. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Salvador followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Feira de Santana followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Vitória da Conquista rose steadily.
How do development practices in Bahia fare in comparison to others in Brazil? Most recently in 2001-2014, street construction in Bahia was the 10th-most disconnected out of the 29 regions in Brazil. Its position in the ranks since 1975 has fallen; relative to other regions in Brazil, street construction in Bahia has become more connected. Bahia ranked 8th in 1975, 10th in 1976-1990, 14th in 1991-2000 and 10th in 2001-2014.
As of 2014, the city with the most disconnected street network in Bahia is Salvador with an SNDi of 4.82, which is highly disconnected. Conversely, the most connected city is Guanambi with an SNDi of -0.31, which is very well-connected. See trends for these cities: Guanambi, Salvador
The level of street-network sprawl in the aggregate network in Bahia was at its lowest in 1976-1990. To get a sense of how the aggregate street network has changed in Bahia, we can consider three of its most populous cities: Salvador, Feira de Santana and Vitória da Conquista. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Salvador rose steadily. The level of street-network sprawl in the aggregate network in Feira de Santana rose steadily. The level of street-network sprawl in the aggregate network in Vitória da Conquista rose steadily.
To date, Bahia is the 9th-most disconnected out of the 29 regions in Brazil. Its position in the ranks since 1975 has fallen; relative to other regions in Brazil, the street network in Bahia has become more connected. Bahia ranked 8th in 1975, 9th in 1976-1990, 9th in 1991-2000 and 9th in 2001-2014.