Gejiu in context: Street-network sprawl trends

Gejiu in context

46810<19751976–19901991–20052006–2020SNDi of street additions
46810<19751976–19901991–20052006–2020SNDi of entire street network
GejiuYunnan (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Gejiu plotted against Yunnan and China. The SNDi of new construction in Gejiu rose steadily, compared to Yunnan which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Gejiu's incremental SNDi rose from 7.31 to 10.98 between 1991-2005 and 2006-2020. In terms of the aggregate network, Gejiu ranked 72nd out of 78 cities in Yunnan and 1745th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
10.98
Rank in China
1832nd of 1843
Rank in Yunnan
77th of 78

Entire Network (Aggregate)

SNDi value
5.26
Rank in China
1745th of 1843
Rank in Yunnan
72nd of 78

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

What about similarly populated cities?

36912<19751976–19901991–20052006–2020SNDi of street additions
36912<19751976–19901991–20052006–2020SNDi of entire street network
GejiuBoluoAs Sayh

In new street additions, Gejiu built increasingly disconnected streets over time, while Boluo fluctuated in its street-construction patterns and As Sayh built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full street network, though, all three cities follow the same trend. Gejiu and Boluo have been growing further apart in their street-network character since 1975.