Ankazomborona in context: Street-network sprawl trends

Ankazomborona in context

369<19751976–19901991–20052006–2020SNDi of street additions
369<19751976–19901991–20052006–2020SNDi of entire street network
AnkazomboronaMahajanga (Region)Madagascar (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ankazomborona plotted against Mahajanga and Madagascar. The SNDi of new construction in Ankazomborona followed a zig-zag trend with an overall decrease, compared to Mahajanga which rose steadily and Madagascar which rose steadily. Most recently, Ankazomborona's incremental SNDi fell from 9.31 to 2.97 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ankazomborona ranked 3rd out of 3 cities in Mahajanga and 17th out of 21 in Madagascar as of 2020.

New Street Additions (2006–2020)

SNDi value
2.97
Rank in Madagascar
6th of 21
Rank in Mahajanga
2nd of 3

Entire Network (Aggregate)

SNDi value
6.15
Rank in Madagascar
17th of 21
Rank in Mahajanga
3rd of 3

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

0369<19751976–19901991–20052006–2020SNDi of street additions
0369<19751976–19901991–20052006–2020SNDi of entire street network
AnkazomboronaBuyoAbejukolo

In new street additions, Ankazomborona fluctuated in its street-construction patterns, while Buyo fluctuated in its street-construction patterns and Abejukolo built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns. For the full network, Ankazomborona fluctuated in connectivity, while Buyo fluctuated in connectivity and Abejukolo became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Ankazomborona and Buyo have been converging in their street-network character since 1975.