Toamasina: region in Madagascar
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 Toamasina, Madagascar on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Toamasina as of 2014, the overall level of street-network sprawl is 4.81, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 4.62, 4.49, 5.14 and 8.17. The disconnectivity of new streets constructed in Toamasina fell, then rose. In 1976-1990, new street layouts were the most connected.
Quantity of street network construction: The street network in Toamasina spans a total of 3435 kilometers. The period with the greatest volume of street construction was 1976-1990. These roads have an SNDi of 4.49, 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 4.62, 4.57, 4.57 and 4.81. The SNDi of the aggregate street network in fell at first, but Toamasina has worsened in disconnectivity since 1990.
The level of street-network sprawl in new development in Toamasina was at its lowest in 1976-1990. To get a sense of how street development has changed in Toamasina, we can consider one of its most populous cities: Maroantsetra. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Maroantsetra followed a zig-zag trend.
How do development practices in Toamasina fare in comparison to others in Madagascar? Most recently in 2001-2014, street construction in Toamasina was the 1st-most disconnected out of the 6 regions in Madagascar. Its position in the ranks since 1975 has risen; relative to other regions in Madagascar, street construction in Toamasina has become more disconnected. Toamasina ranked 5th in 1975, 5th in 1976-1990, 6th in 1991-2000 and 1st in 2001-2014.
As of 2014, the city with the most disconnected street network in Toamasina is Maroantsetra with an SNDi of 2.51, which is in the 40th to 60th percentile of disconnectedness. Conversely, the most connected city is Maroantsetra with an SNDi of 2.51, which is in the 40th to 60th percentile of disconnectedness. See trends for these cities: Maroantsetra, Maroantsetra
The level of street-network sprawl in the aggregate network in Toamasina was at its lowest in 1976-1990. To get a sense of how the aggregate street network has changed in Toamasina, we can consider one of its most populous cities: Maroantsetra. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Maroantsetra fell steadily.
To date, Toamasina is the 5th-most disconnected out of the 6 regions in Madagascar. Its position in the ranks since 1975 has not changed. Toamasina ranked 5th in 1975, 5th in 1976-1990, 6th in 1991-2000 and 5th in 2001-2014.