Ilocos Norte: 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 Ilocos Norte, Philippines on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Ilocos Norte as of 2014, the overall level of street-network sprawl is 2.0, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 0.81, 1.83, 4.59 and 8.03. In each period, new street development in Ilocos Norte steadily grows more disconnected than in the last.
Quantity of street network construction: The street network in Ilocos Norte spans a total of 2135 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 1.83, 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 0.81, 1.38, 1.6 and 2.0. Overall, the SNDi of the aggregate street network has risen: the street network in Ilocos Norte has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.57 points, but between 1991-2000 and 2001-2014, it rose by just 0.4.
The level of street-network sprawl in new development in Ilocos Norte rose steadily. To get a sense of how street development has changed in Ilocos Norte, we can consider one of its most populous cities: Laoag. Disconnectivity in the most populous cities in Ilocos Norte follow the same region trend.
How do development practices in Ilocos Norte fare in comparison to others in Philippines? Most recently in 2001-2014, street construction in Ilocos Norte was the 4th-most disconnected out of the 51 regions in Philippines. Its position in the ranks since 1975 has risen; relative to other regions in Philippines, street construction in Ilocos Norte has become more disconnected. Ilocos Norte ranked 51st in 1975, 50th in 1976-1990, 42nd in 1991-2000 and 4th in 2001-2014.
As of 2014, the city with the most disconnected street network in Ilocos Norte is Laoag with an SNDi of -0.06, which is very well-connected. Conversely, the most connected city is Laoag with an SNDi of -0.06, which is very well-connected. See trends for these cities: Laoag, Laoag
The level of street-network sprawl in the aggregate network in Ilocos Norte rose steadily. To get a sense of how the aggregate street network has changed in Ilocos Norte, we can consider one of its most populous cities: Laoag. Disconnectivity in the most populous cities in Ilocos Norte follow the same region trend.
To date, Ilocos Norte is the 51st-most disconnected out of the 51 regions in Philippines. Its position in the ranks since 1975 has not changed. Ilocos Norte ranked 51st in 1975, 51st in 1976-1990, 51st in 1991-2000 and 51st in 2001-2014.