Zamboanga del Sur: 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 Zamboanga del Sur, Philippines on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Zamboanga del Sur as of 2014, the overall level of street-network sprawl is 7.19, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 7.59, 5.79, 7.71 and 7.79. The disconnectivity of new streets constructed in Zamboanga del Sur fell, then rose. In 1976-1990, new street layouts were the most connected.
Quantity of street network construction: The street network in Zamboanga del Sur spans a total of 5255 kilometers. The period with the greatest volume of street construction was 1975. These roads have an SNDi of 7.59, 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 7.59, 7.25, 7.29 and 7.19. Disconnectivity in Zamboanga del Sur's street network follows a zig-zag trend. In 2001-2014, the region was most disconnected; while it was most connected in 1975.
The level of street-network sprawl in new development in Zamboanga del Sur was at its lowest in 1976-1990. To get a sense of how street development has changed in Zamboanga del Sur, we can consider three of its most populous cities: Zamboanga City, Pagadian and Cawit. Out of the three cities, Zamboanga City and Pagadian do not follow the same trend as the region. The level of street-network sprawl in new development in Zamboanga City followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Pagadian rose steadily.
How do development practices in Zamboanga del Sur fare in comparison to others in Philippines? Most recently in 2001-2014, street construction in Zamboanga del Sur was the 6th-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 Zamboanga del Sur has become more connected. Zamboanga del Sur ranked 1st in 1975, 7th in 1976-1990, 4th in 1991-2000 and 6th in 2001-2014.
As of 2014, the city with the most disconnected street network in Zamboanga del Sur is Zamboanga City with an SNDi of 6.61, which is highly disconnected. Conversely, the most connected city is Pagadian with an SNDi of 5.16, which is highly disconnected. See trends for these cities: Pagadian, Zamboanga City
The level of street-network sprawl in the aggregate network in Zamboanga del Sur followed a zig-zag trend with an overall decrease. To get a sense of how the aggregate street network has changed in Zamboanga del Sur, we can consider three of its most populous cities: Zamboanga City, Pagadian and Cawit. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Zamboanga City rose steadily. The level of street-network sprawl in the aggregate network in Pagadian rose steadily. The level of street-network sprawl in the aggregate network in Cawit was at its lowest in 1976-1990.
To date, Zamboanga del Sur is the 2nd-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 Zamboanga del Sur has become more connected. Zamboanga del Sur ranked 1st in 1975, 2nd in 1976-1990, 2nd in 1991-2000 and 2nd in 2001-2014.