Sonchon in context: Street-network sprawl trends
Sonchon in context
The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Sonchon plotted against P'yŏngan-bukto and North Korea. While P'yŏngan-bukto and North Korea both peaked in 1976-1990, Sonchon's new street additions peaked in 1976-1990. Most recently, Sonchon's incremental SNDi fell from 3.17 to 3.02 between 1991-2005 and 2006-2020. In terms of the aggregate network, Sonchon ranked 1st out of 16 cities in P'yŏngan-bukto and 5th out of 92 in North Korea as of 2020.
New Street Additions (2006–2020)
- SNDi value
- 3.02
- Rank in North Korea
- 13th of 92
- Rank in P'yŏngan-bukto
- 2nd of 16
Entire Network (Aggregate)
- SNDi value
- 3.14
- Rank in North Korea
- 5th of 92
- Rank in P'yŏngan-bukto
- 1st of 16
Rankings go from most connected to most disconnected — rank 1 is the most connected.
What about similarly populated cities?
In new street additions, Sonchon and Kovrov both built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Yuqi fluctuated in its street-construction patterns. For the full network, Sonchon and Kovrov both grew more disconnected from 1975 through 1991-2005, then improved, while Yuqi fluctuated in connectivity. Sonchon and Kovrov have been growing further apart in their street-network character since 1975.