The New Urban Crisis provides a tidy, timely summary of the current urban problem, in all its enormity. >>read more

In the ever-lasting debate over sprawl, the most enduring argument centers on the definition of sprawl itself. The latest entrant is, perhaps, the oldest entrant: density. 

As reported by Richard Florida in his CityLab column this week, NYU doctoral student Thomas Laidley has introduced a new method to measure sprawl. Laidley's "Sprawl Index" uses the following methodology: 

"Laidley uses these aerial images to estimate sprawl at the Census block level, the smallest level available, estimating the share of metro population in those blocks below three key thresholds: 3,500, 8,500, and 20,000 persons per square mile. His index is based on the average of these three values, with higher scores reflecting higher levels of sprawl."