Zijin in context: Street-network sprawl trends
Zijin in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Zijin plotted against Guangdong and China. The SNDi of new construction in Zijin was at its lowest in 1976-1990, compared to Guangdong which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Zijin's incremental SNDi rose from 3.19 to 3.64 between 1991-2005 and 2006-2020. In terms of the aggregate network, Zijin ranked 70th out of 133 cities in Guangdong and 1239th out of 1843 in China as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 3.64
- Rank in China
- 1222nd of 1843
- Rank in Guangdong
- 61st of 133
Entire Network (Aggregate)
- SNDi value
- 3.29
- Rank in China
- 1239th of 1843
- Rank in Guangdong
- 70th of 133
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
- Marabá, Brazil
- Panchagarh, Bangladesh
- Pacitan, Indonesia
- Cartago, Costa Rica
- Anxi, China
- Newcastle, Australia
In new street additions, Zijin built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Marabá built increasingly disconnected streets from 1975 through 1976-1990, then improved and Cartago built increasingly disconnected streets over time. Looking at the full network, Marabá and Cartago both became progressively more disconnected, while Zijin fluctuated in connectivity. Notably, Zijin had a more sprawly network than Cartago in 1975 but the two have since reversed their relative ranking.