Songnim in context: Street-network sprawl trends

Songnim in context

4.95.66.3<19751976–19901991–20052006–2020SNDi of street additions
4.95.66.3<19751976–19901991–20052006–2020SNDi of entire street network
SongnimHwanghae-bukto (Region)North Korea (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Songnim plotted against Hwanghae-bukto and North Korea. The SNDi of new construction in Songnim followed a zig-zag trend with an overall increase, compared to Hwanghae-bukto which followed a zig-zag trend with an overall increase and North Korea which peaked in 1976-1990. Most recently, Songnim's incremental SNDi rose from 5.77 to 6.71 between 1991-2005 and 2006-2020. In terms of the aggregate network, Songnim ranked 4th out of 6 cities in Hwanghae-bukto and 58th out of 92 in North Korea as of 2020.

New Street Additions (2006–2020)

SNDi value
6.71
Rank in North Korea
69th of 92
Rank in Hwanghae-bukto
6th of 6

Entire Network (Aggregate)

SNDi value
5.46
Rank in North Korea
58th of 92
Rank in Hwanghae-bukto
4th of 6

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

What about similarly populated cities?

234567<19751976–19901991–20052006–2020SNDi of street additions
234567<19751976–19901991–20052006–2020SNDi of entire street network
SongnimParakouPorlamar

In new street additions, Songnim, Parakou, and Porlamar all fluctuated in street-construction patterns. For the full network, Songnim and Parakou both became progressively more disconnected, while Porlamar fluctuated in connectivity. Songnim and Porlamar have been converging in their street-network character since 1975.