La Union: 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 La Union, Philippines on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in La Union as of 2014, the overall level of street-network sprawl is 4.21, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 3.63, 4.41, 6.47 and 5.26. Street construction in La Union increased in disconnectivity initially but has since improved. The streets constructed in 1991-2000 were the most disconnected.
Quantity of street network construction: The street network in La Union spans a total of 1661 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 4.41, 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 3.63, 3.94, 4.17 and 4.21. Overall, the SNDi of the aggregate street network has risen: the street network in La Union has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.31 points, but between 1991-2000 and 2001-2014, it rose by just 0.04.
The level of street-network sprawl in new development in La Union peaked in 1991-2000. To get a sense of how street development has changed in La Union, we can consider one of its most populous cities: San Fernando. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in San Fernando followed a zig-zag trend.
How do development practices in La Union fare in comparison to others in Philippines? Most recently in 2001-2014, street construction in La Union was the 40th-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 La Union has become more connected. La Union ranked 23rd in 1975, 33rd in 1976-1990, 15th in 1991-2000 and 40th in 2001-2014.
As of 2014, the city with the most disconnected street network in La Union is San Fernando with an SNDi of 4.99, which is highly disconnected. Conversely, the most connected city is San Fernando with an SNDi of 4.99, which is highly disconnected. See trends for these cities: San Fernando, San Fernando
The level of street-network sprawl in the aggregate network in La Union rose steadily. To get a sense of how the aggregate street network has changed in La Union, we can consider one of its most populous cities: San Fernando. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in San Fernando peaked in 1991-2000.
To date, La Union is the 37th-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 La Union has become more connected. La Union ranked 23rd in 1975, 31st in 1976-1990, 35th in 1991-2000 and 37th in 2001-2014.