Qinnan in context: Street-network sprawl trends

Qinnan in context

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
QinnanJiangsu (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Qinnan plotted against Jiangsu and China. While Jiangsu and China both followed a zig-zag trend with an overall increase, Qinnan's new street additions followed a zig-zag trend with an overall increase. Most recently, Qinnan's incremental SNDi rose from 2.38 to 5.64 between 1991-2005 and 2006-2020. In terms of the aggregate network, Qinnan ranked 84th out of 101 cities in Jiangsu and 1423rd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
5.64
Rank in China
1719th of 1843
Rank in Jiangsu
98th of 101

Entire Network (Aggregate)

SNDi value
3.61
Rank in China
1423rd of 1843
Rank in Jiangsu
84th of 101

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

What about similarly populated cities?

234567<19751976–19901991–20052006–2020SNDi of street additions
234567<19751976–19901991–20052006–2020SNDi of entire street network
QinnanSylvaItapema

In new street additions, Qinnan and Сылва both fluctuated in its street-construction patterns, while Itapema built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Qinnan and Сылва both fluctuated in connectivity, while Itapema became progressively more disconnected. Qinnan and Сылва have been growing further apart in their street-network character since 1975.