Bulacan: 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 Bulacan, Philippines on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Bulacan as of 2014, the overall level of street-network sprawl is 5.39, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 5.02, 5.49, 5.44 and 5.79. Disconnectivity in street construction in Bulacan follows a zig-zag trend. In 1975, street construction was most disconnected, while construction was most connected in 2001-2014.
Quantity of street network construction: The street network in Bulacan spans a total of 6416 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 5.49, 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 5.02, 5.35, 5.35 and 5.39. Disconnectivity in Bulacan's street network follows a zig-zag trend. In 1975, the region was most disconnected; while it was most connected in 2001-2014.
The level of street-network sprawl in new development in Bulacan followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Bulacan, we can consider two of its most populous cities: Hagonoy and Calumpit. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Hagonoy followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Calumpit rose steadily.
How do development practices in Bulacan fare in comparison to others in Philippines? Most recently in 2001-2014, street construction in Bulacan was the 29th-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 Bulacan has become more connected. Bulacan ranked 11th in 1975, 14th in 1976-1990, 27th in 1991-2000 and 29th in 2001-2014.
As of 2014, the city with the most disconnected street network in Bulacan is Calumpit with an SNDi of 4.9, which is highly disconnected. Conversely, the most connected city is Hagonoy with an SNDi of 4.54, which is highly disconnected. See trends for these cities: Hagonoy, Calumpit
The level of street-network sprawl in the aggregate network in Bulacan followed a zig-zag trend with an overall increase. To get a sense of how the aggregate street network has changed in Bulacan, we can consider two of its most populous cities: Hagonoy and Calumpit. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Hagonoy rose steadily. The level of street-network sprawl in the aggregate network in Calumpit rose steadily.
To date, Bulacan is the 13th-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 Bulacan has become more connected. Bulacan ranked 11th in 1975, 10th in 1976-1990, 11th in 1991-2000 and 13th in 2001-2014.