Qin'an in context: Street-network sprawl trends

Qin'an in context

3456<19751976–19901991–20052006–2020SNDi of street additions
3456<19751976–19901991–20052006–2020SNDi of entire street network
Qin'anGansu (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Qin'an plotted against Gansu and China. While Gansu and China both followed a zig-zag trend with an overall increase, Qin'an's new street additions followed a zig-zag trend with an overall increase. Most recently, Qin'an's incremental SNDi rose from 4.85 to 6.47 between 1991-2005 and 2006-2020. In terms of the aggregate network, Qin'an ranked 24th out of 29 cities in Gansu and 1762nd out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
6.47
Rank in China
1764th of 1843
Rank in Gansu
28th of 29

Entire Network (Aggregate)

SNDi value
5.41
Rank in China
1762nd of 1843
Rank in Gansu
24th of 29

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
Qin'anSievierodonetskElland

In new street additions, Qin'an fluctuated in its street-construction patterns, while Sievierodonetsk built increasingly disconnected streets over time and Elland built increasingly disconnected streets from 1975 through 1991-2005, then improved. Looking at the full network, Sievierodonetsk and Elland both became progressively more disconnected, while Qin'an fluctuated in connectivity. Qin'an and Elland have been growing further apart in their street-network character since 1975.