Negros Occidental: 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 Negros Occidental, Philippines on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Negros Occidental as of 2014, the overall level of street-network sprawl is 4.73, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 3.19, 4.91, 5.13 and 5.42. In each period, new street development in Negros Occidental steadily grows more disconnected than in the last. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 1.72 points, but between 1991-2000 and 2001-2014, it rose by just 0.28.
Quantity of street network construction: The street network in Negros Occidental spans a total of 5982 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 5.42, 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 3.19, 4.2, 4.39 and 4.73. Overall, the SNDi of the aggregate street network has risen: the street network in Negros Occidental has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 1.01 points, but between 1991-2000 and 2001-2014, it rose by just 0.34.
The level of street-network sprawl in new development in Negros Occidental rose steadily. To get a sense of how street development has changed in Negros Occidental, we can consider three of its most populous cities: Bacolod, Silay and Cadiz. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Bacolod followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Silay peaked in 1991-2000. The level of street-network sprawl in new development in Cadiz followed a zig-zag trend with an overall increase.
How do development practices in Negros Occidental fare in comparison to others in Philippines? Most recently in 2001-2014, street construction in Negros Occidental was the 36th-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 Negros Occidental has become more connected. Negros Occidental ranked 34th in 1975, 23rd in 1976-1990, 34th in 1991-2000 and 36th in 2001-2014.
As of 2014, the city with the most disconnected street network in Negros Occidental is Bacolod with an SNDi of 4.2, which is highly disconnected. Conversely, the most connected city is Cadiz with an SNDi of 1.87, which is relatively well-connected. See trends for these cities: Cadiz, Bacolod
The level of street-network sprawl in the aggregate network in Negros Occidental rose steadily. To get a sense of how the aggregate street network has changed in Negros Occidental, we can consider three of its most populous cities: Bacolod, Silay and Cadiz. Out of the three cities, Cadiz does not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Cadiz peaked in 1976-1990.
To date, Negros Occidental is the 28th-most disconnected out of the 51 regions in Philippines. Its position in the ranks since 1975 has risen; relative to other regions in Philippines, the street network in Negros Occidental has become more disconnected. Negros Occidental ranked 34th in 1975, 28th in 1976-1990, 30th in 1991-2000 and 28th in 2001-2014.