Puttalam: region in Sri Lanka
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 Puttalam, Sri Lanka on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Puttalam as of 2014, the overall level of street-network sprawl is 4.39, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 2.32, 4.99, 3.44 and 4.7. Disconnectivity in street construction in Puttalam follows a zig-zag trend. In 1975, street construction was most disconnected, while construction was most connected in 1976-1990.
Quantity of street network construction: The street network in Puttalam spans a total of 2286 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 4.7, 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 2.32, 4.63, 4.3 and 4.39. Disconnectivity in Puttalam's street network follows a zig-zag trend. In 1975, the region was most disconnected; while it was most connected in 1976-1990.
The level of street-network sprawl in new development in Puttalam followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Puttalam, we can consider one of its most populous cities: Wennappuwa. Disconnectivity in the most populous cities in Puttalam follow the same region trend.
How do development practices in Puttalam fare in comparison to others in Sri Lanka? Most recently in 2001-2014, street construction in Puttalam was the 10th-most disconnected out of the 13 regions in Sri Lanka. Its position in the ranks since 1975 has not changed. Puttalam ranked 10th in 1975, 5th in 1976-1990, 12th in 1991-2000 and 10th in 2001-2014.
As of 2014, the city with the most disconnected street network in Puttalam is Wennappuwa with an SNDi of 4.63, which is highly disconnected. Conversely, the most connected city is Wennappuwa with an SNDi of 4.63, which is highly disconnected. See trends for these cities: Wennappuwa, Wennappuwa
The level of street-network sprawl in the aggregate network in Puttalam followed a zig-zag trend with an overall increase. To get a sense of how the aggregate street network has changed in Puttalam, we can consider one of its most populous cities: Wennappuwa. Disconnectivity in the most populous cities in Puttalam follow the same region trend.
To date, Puttalam is the 8th-most disconnected out of the 13 regions in Sri Lanka. Its position in the ranks since 1975 has risen; relative to other regions in Sri Lanka, the street network in Puttalam has become more disconnected. Puttalam ranked 10th in 1975, 7th in 1976-1990, 8th in 1991-2000 and 8th in 2001-2014.