Basilan: region in Philippines
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 Basilan, Philippines on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Basilan as of 2014, the overall level of street-network sprawl is 6.51, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 6.7, 5.74, 8.96 and 4.81. Disconnectivity in street construction in Basilan follows a zig-zag trend. In 2001-2014, street construction was most disconnected, while construction was most connected in 1991-2000.
Quantity of street network construction: The street network in Basilan spans a total of 736 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 5.74, 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 6.7, 6.32, 6.52 and 6.51. Disconnectivity in Basilan's street network follows a zig-zag trend. In 1976-1990, the region was most disconnected; while it was most connected in 1975.
The level of street-network sprawl in new development in Basilan followed a zig-zag trend with an overall decrease. To get a sense of how street development has changed in Basilan, we can consider one of its most populous cities: Isabela City. Disconnectivity in the most populous cities in Basilan follow the same region trend.
How do development practices in Basilan fare in comparison to others in Philippines? Most recently in 2001-2014, street construction in Basilan was the 45th-most disconnected out of the 51 regions in Philippines. Its position in the ranks since 1975 has fallen; relative to other regions in Philippines, street construction in Basilan has become more connected. Basilan ranked 3rd in 1975, 10th in 1976-1990, 2nd in 1991-2000 and 45th in 2001-2014.
As of 2014, the city with the most disconnected street network in Basilan is Isabela City with an SNDi of 6.06, which is highly disconnected. Conversely, the most connected city is Isabela City with an SNDi of 6.06, which is highly disconnected. See trends for these cities: Isabela City, Isabela City
The level of street-network sprawl in the aggregate network in Basilan followed a zig-zag trend with an overall decrease. To get a sense of how the aggregate street network has changed in Basilan, we can consider one of its most populous cities: Isabela City. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Isabela City rose steadily.
To date, Basilan is the 5th-most disconnected out of the 51 regions in Philippines. Its position in the ranks since 1975 has fallen; relative to other regions in Philippines, the street network in Basilan has become more connected. Basilan ranked 3rd in 1975, 4th in 1976-1990, 4th in 1991-2000 and 5th in 2001-2014.