Antsiranana: 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 Antsiranana, Madagascar on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Antsiranana as of 2014, the overall level of street-network sprawl is 4.72, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 4.69, 4.23, 7.0 and 5.91. Disconnectivity in street construction in Antsiranana follows a zig-zag trend. In 1976-1990, street construction was most disconnected, while construction was most connected in 1991-2000.
Quantity of street network construction: The street network in Antsiranana spans a total of 2142 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 4.69, 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 4.69, 4.52, 4.6 and 4.72. The SNDi of the aggregate street network in fell at first, but Antsiranana has worsened in disconnectivity since 1990.
The level of street-network sprawl in new development in Antsiranana followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Antsiranana, we can consider one of its most populous cities: Andoany. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Andoany followed a zig-zag trend.
How do development practices in Antsiranana fare in comparison to others in Madagascar? Most recently in 2001-2014, street construction in Antsiranana was the 5th-most disconnected out of the 6 regions in Madagascar. Its position in the ranks since 1975 has fallen; relative to other regions in Madagascar, street construction in Antsiranana has become more connected. Antsiranana ranked 4th in 1975, 6th in 1976-1990, 3rd in 1991-2000 and 5th in 2001-2014.
As of 2014, the city with the most disconnected street network in Antsiranana is Andoany with an SNDi of 1.38, which is relatively well-connected. Conversely, the most connected city is Andoany with an SNDi of 1.38, which is relatively well-connected. See trends for these cities: Andoany, Andoany
The level of street-network sprawl in the aggregate network in Antsiranana was at its lowest in 1976-1990. To get a sense of how the aggregate street network has changed in Antsiranana, we can consider one of its most populous cities: Andoany. Disconnectivity in the most populous cities in Antsiranana follow the same region trend.
To date, Antsiranana is the 6th-most disconnected out of the 6 regions in Madagascar. Its position in the ranks since 1975 has fallen; relative to other regions in Madagascar, the street network in Antsiranana has become more connected. Antsiranana ranked 4th in 1975, 6th in 1976-1990, 5th in 1991-2000 and 6th in 2001-2014.