Tarapacá: region in Chile
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 Tarapacá, Chile on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Tarapacá as of 2014, the overall level of street-network sprawl is 1.58, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 1.84, 1.06, 1.78 and 1.74. Disconnectivity in street construction in Tarapacá follows a zig-zag trend. In 1976-1990, street construction was most disconnected, while construction was most connected in 1975.
Quantity of street network construction: The street network in Tarapacá spans a total of 2747 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 1.84, which is relatively well-connected.
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 1.84, 1.46, 1.55 and 1.58. The SNDi of the aggregate street network in fell at first, but Tarapacá has worsened in disconnectivity since 1990.
The level of street-network sprawl in new development in Tarapacá followed a zig-zag trend with an overall decrease. To get a sense of how street development has changed in Tarapacá, we can consider one of its most populous cities: Iquique. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Iquique peaked in 1991-2000.
How do development practices in Tarapacá fare in comparison to others in Chile? Most recently in 2001-2014, street construction in Tarapacá was the 14th-most disconnected out of the 16 regions in Chile. Its position in the ranks since 1975 has fallen; relative to other regions in Chile, street construction in Tarapacá has become more connected. Tarapacá ranked 12th in 1975, 15th in 1976-1990, 15th in 1991-2000 and 14th in 2001-2014.
As of 2014, the city with the most disconnected street network in Tarapacá is Iquique with an SNDi of 0.52, which is relatively well-connected. Conversely, the most connected city is Iquique with an SNDi of 0.52, which is relatively well-connected. See trends for these cities: Iquique, Iquique
The level of street-network sprawl in the aggregate network in Tarapacá was at its lowest in 1976-1990. To get a sense of how the aggregate street network has changed in Tarapacá, we can consider one of its most populous cities: Iquique. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Iquique rose steadily.
To date, Tarapacá is the 16th-most disconnected out of the 16 regions in Chile. Its position in the ranks since 1975 has fallen; relative to other regions in Chile, the street network in Tarapacá has become more connected. Tarapacá ranked 12th in 1975, 16th in 1976-1990, 16th in 1991-2000 and 16th in 2001-2014.