Galle in context: Street-network sprawl trends

Galle in context

4567<19751976–19901991–20052006–2020SNDi of street additions
4567<19751976–19901991–20052006–2020SNDi of entire street network
GalleSri Lanka (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Galle plotted against Sri Lanka. Both Galle and Sri Lanka follow the same trend. Most recently, Galle's incremental SNDi rose from 5.6 to 6.95 between 1991-2005 and 2006-2020. In terms of the aggregate network, Galle ranked 16th out of 21 in Sri Lanka as of 2020.

New Street Additions (2006–2020)

SNDi value
6.95
Rank in Sri Lanka
16th of 21

Entire Network (Aggregate)

SNDi value
5.72
Rank in Sri Lanka
16th of 21

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

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
GalleNovo HamburgoMalanje

In new street additions, Galle and Novo Hamburgo both built increasingly disconnected streets over time, while Malanje built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Galle and Novo Hamburgo both became progressively more disconnected, while Malanje grew more disconnected from 1975 through 1991-2005, then improved. Galle and Novo Hamburgo have been growing further apart in their street-network character since 1975.