Attica: region in Greece
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 Attica, Greece on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Attica as of 2014, the overall level of street-network sprawl is 1.29, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 0.69, 3.14, 4.32 and 4.36. In each period, new street development in Attica steadily grows more disconnected than in the last. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 2.45 points, but between 1991-2000 and 2001-2014, it rose by just 0.05.
Quantity of street network construction: The street network in Attica spans a total of 18520 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 0.69, 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 0.69, 1.15, 1.22 and 1.29. Overall, the SNDi of the aggregate street network has risen: the street network in Attica has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.46 points, but between 1991-2000 and 2001-2014, it rose by just 0.07.
The level of street-network sprawl in new development in Attica rose steadily. To get a sense of how street development has changed in Attica, we can consider one of its most populous cities: Athens. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Athens peaked in 1991-2000.
How do development practices in Attica fare in comparison to others in Greece? Most recently in 2001-2014, street construction in Attica was the 3rd-most disconnected out of the 6 regions in Greece. Its position in the ranks since 1975 has risen; relative to other regions in Greece, street construction in Attica has become more disconnected. Attica ranked 6th in 1975, 3rd in 1976-1990, 3rd in 1991-2000 and 3rd in 2001-2014.
As of 2014, the city with the most disconnected street network in Attica is Athens with an SNDi of 0.05, which is very well-connected. Conversely, the most connected city is Athens with an SNDi of 0.05, which is very well-connected. See trends for these cities: Athens, Athens
The level of street-network sprawl in the aggregate network in Attica rose steadily. To get a sense of how the aggregate street network has changed in Attica, we can consider one of its most populous cities: Athens. Disconnectivity in the most populous cities in Attica follow the same region trend.
To date, Attica is the 6th-most disconnected out of the 6 regions in Greece. Its position in the ranks since 1975 has not changed. Attica ranked 6th in 1975, 6th in 1976-1990, 6th in 1991-2000 and 6th in 2001-2014.