Kattumannarkoil 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 Kattumannarkoil plotted against Tamil Nadu and India. The SNDi of new construction in Kattumannarkoil was at its lowest in 1991-2005, compared to Tamil Nadu which rose steadily and India which followed a zig-zag trend with an overall increase. Most recently, Kattumannarkoil's incremental SNDi rose from 4.02 to 5.88 between 1991-2005 and 2006-2020. In terms of the aggregate network, Kattumannarkoil ranked 103rd out of 121 cities in Tamil Nadu and 1334th out of 1868 in India as of 2020.

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

What about similarly populated cities?

• Oyama, Japan
• Qingtian, China
• Qingan, China
• Effon Alaiye, Nigeria
• Dingbian, China
• Songzi, China

While Oyama and Effon Alaiye both fluctuated in its street-construction patterns, Kattumannarkoil built increasingly connected streets from 1975 through 1991-2005, then shifted to more disconnected patterns in new street additions. For the full network, Kattumannarkoil became more connected from 1975 through 1991-2005, then grew more sprawly from 1991-2005 onwards, while Oyama became progressively more disconnected and Effon Alaiye fluctuated in connectivity. Kattumannarkoil and Effon Alaiye have been converging in their street-network character since 1975.