Ongjin in context: Street-network sprawl trends

Ongjin in context

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
OngjinHwanghae-namdo (Region)North Korea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Ongjin plotted against Hwanghae-namdo and North Korea. While Hwanghae-namdo and North Korea both peaked in 1976-1990, Ongjin's new street additions peaked in 1976-1990. Most recently, Ongjin's incremental SNDi fell from 3.75 to 2.4 between 1991-2005 and 2006-2020. In terms of the aggregate network, Ongjin ranked 5th out of 15 cities in Hwanghae-namdo and 8th out of 92 in North Korea as of 2020.

New Street Additions (2006–2020)

SNDi value
2.4
Rank in North Korea
8th of 92
Rank in Hwanghae-namdo
2nd of 15

Entire Network (Aggregate)

SNDi value
3.58
Rank in North Korea
8th of 92
Rank in Hwanghae-namdo
5th of 15

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

What about similarly populated cities?

1.62.43.24<19751976–19901991–20052006–2020SNDi of street additions
1.62.43.24<19751976–19901991–20052006–2020SNDi of entire street network
OngjinNawnghkioAnzhou

In new street additions, Ongjin built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Nawnghkio fluctuated in its street-construction patterns and Anzhou built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Ongjin grew more disconnected from 1975 through 1991-2005, then improved, while Nawnghkio fluctuated in connectivity and Anzhou became progressively more disconnected. Ongjin and Nawnghkio have been converging in their street-network character since 1975.