Quảng Nam: region in Vietnam
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 Quảng Nam, Vietnam on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Quảng Nam as of 2014, the overall level of street-network sprawl is 3.7, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 2.39, 3.08, 4.38 and 4.19. Street construction in Quảng Nam 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 Quảng Nam spans a total of 5955 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 4.19, 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 2.39, 2.86, 3.45 and 3.7. Overall, the SNDi of the aggregate street network has risen: the street network in Quảng Nam has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.47 points, but between 1991-2000 and 2001-2014, it rose by just 0.25.
The level of street-network sprawl in new development in Quảng Nam peaked in 1991-2000. To get a sense of how street development has changed in Quảng Nam, we can consider two of its most populous cities: Tam Kỳ and Hoi An. Out of the two cities, Tam Kỳ does not follow the same trend as the region. The level of street-network sprawl in new development in Tam Kỳ followed a zig-zag trend with an overall increase.
How do development practices in Quảng Nam fare in comparison to others in Vietnam? Most recently in 2001-2014, street construction in Quảng Nam was the 20th-most disconnected out of the 59 regions in Vietnam. Its position in the ranks since 1975 has risen; relative to other regions in Vietnam, street construction in Quảng Nam has become more disconnected. Quảng Nam ranked 29th in 1975, 26th in 1976-1990, 12th in 1991-2000 and 20th in 2001-2014.
As of 2014, the city with the most disconnected street network in Quảng Nam is Tam Kỳ with an SNDi of 2.78, which is in the 40th to 60th percentile of disconnectedness. Conversely, the most connected city is Hoi An with an SNDi of 2.4, which is in the 40th to 60th percentile of disconnectedness. See trends for these cities: Hoi An, Tam Kỳ
The level of street-network sprawl in the aggregate network in Quảng Nam rose steadily. To get a sense of how the aggregate street network has changed in Quảng Nam, we can consider two of its most populous cities: Tam Kỳ and Hoi An. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Tam Kỳ followed a zig-zag trend with an overall increase. The level of street-network sprawl in the aggregate network in Hoi An peaked in 1991-2000.
To date, Quảng Nam is the 21st-most disconnected out of the 59 regions in Vietnam. Its position in the ranks since 1975 has risen; relative to other regions in Vietnam, the street network in Quảng Nam has become more disconnected. Quảng Nam ranked 29th in 1975, 25th in 1976-1990, 21st in 1991-2000 and 21st in 2001-2014.