Some researchers believe a city could create a municipal Wi-Fi system by piggybacking on the many residential and business hotspots already dotting most cities. However, it must be determined just how large and dense the existing Wi-Fi clouds are. Paul Torrens, associate professor of geography recently completed the first maps of Wi-Fi coverage on a citywide scale. “I was using Wi-Fi myself and noticing the phenomenon unfolding before my eyes,” he says. “I thought there must be a geography to it.” Editor's Note: Links are included for informational purposes only. Due to varying editorial policies, news publications may remove or change a link for archival purposes at any time without notice.