Pitt Street, Sydney

Sydney-based designer Dan Hill has been looking at the pavement. He is interested in capturing everyday examples of how the city assesses invisible or hidden characteristics of its infrastructure and he writes about this in his blog post Sensing the immaterial-material city. You can see Dan’s photos here. They include shots of people who appear to be sensing the city and he calls these people – with their traffic cones and their fluorescent work jackets – sensors.

Frederick Street, Petersham

Along with their various probes and surveying instruments, an essential item of equipment for these people is the spray can.