Georgetown in context: Street-network sprawl trends

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Georgetown plotted against Demerara-Mahaica and Guyana. The SNDi of new construction in Georgetown was at its lowest in 1976-1990, compared to Demerara-Mahaica which followed a zig-zag trend with an overall decrease and Guyana which was at its lowest in 1991-2005. Most recently, Georgetown's incremental SNDi rose from 3.03 to 3.74 between 1991-2005 and 2006-2020. In terms of the aggregate network, Georgetown ranked 1st out of 2 cities in Demerara-Mahaica and 1st out of 2 in Guyana as of 2020.

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

What about similarly populated cities?

• Nabha, India
• Gallarate, Italy
• Khanakul, India
• Osorno, Chile
• Dongliang, China
• Amassoma, Nigeria

In new street additions, Georgetown built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns, while Nabha built increasingly disconnected streets over time and Osorno built increasingly disconnected streets from 1975 through 1991-2005, then improved. For the full network, Georgetown became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards, while Nabha became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Osorno became progressively more disconnected. Georgetown and Nabha have been converging in their street-network character since 1975.