Walking the line. Watch artist Simon Faithfull travel both built and unbuilt environments along “the exact longitude of the Greenwich Meridian,” using a GPS device in his documentary project “0˚00 Navigation.”  Above is an excerpt through London, but you can also watch the whole thing here. (h/t Polis.)

At the city gates. In this short article at the Sustainable Cities Collective, Chuck Wolfe muses over what a “city gate” would be in a modern city, contending that Google streetview is one form of a modern gate incarnation. Is a physical gate just an ornament of memories, or do we need the architectural drama only a physical threshold can provide?

Art heals blight. As Elizabeth Currid-Halkett notes in the NY Times, art as a revitalization tool works, but not always. It takes more than just cheap rent and abandoned factory lofts to cultivate the next Soho. Take the case of Red Hook’s art scene from the Brooklyn Daily Eagle: art, given its mercurial nature, may be best left alone, like the somewhat-isolated Brooklyn neighborhood.

A map for Captain Planet. SkyTruth, a nonprofit environmental monitoring group, recently launched a real-time, interactive alert system that digitally maps domestic pollution events, such as toxic spills and air & water pollution. More at the LA Times blog.