盐官古城 in context: Street-network sprawl trends

Yan Guan Gu Cheng in context

34567<19751976–19901991–20052006–2020SNDi of street additions
34567<19751976–19901991–20052006–2020SNDi of entire street network
Yan Guan Gu Cheng Zhejiang (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with 盐官古城 plotted against Zhejiang and China. The SNDi of new construction in 盐官古城 fell steadily, compared to Zhejiang which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, 盐官古城's incremental SNDi fell from 3.44 to 3.0 between 1991-2005 and 2006-2020. In terms of the aggregate network, 盐官古城 ranked 82nd out of 116 cities in Zhejiang and 1376th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.0
Rank in China
883rd of 1843
Rank in Zhejiang
62nd of 116

Entire Network (Aggregate)

SNDi value
3.51
Rank in China
1376th of 1843
Rank in Zhejiang
82nd of 116

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

What about similarly populated cities?

46810<19751976–19901991–20052006–2020SNDi of street additions
46810<19751976–19901991–20052006–2020SNDi of entire street network
Yan Guan Gu Cheng Paonta SahibJakhim

In new street additions, 盐官古城 built increasingly connected streets over time, while Paonta Sahib built increasingly disconnected streets over time and Jakhim fluctuated in its street-construction patterns. For the full network, 盐官古城 became progressively more connected, while Paonta Sahib became progressively more disconnected and Jakhim became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Notably, 盐官古城 had a more sprawly network than Paonta Sahib in 1975 but the two have since reversed their relative ranking.