Ten percent of LA billboards lack permits, KCET finds

After the city Department of Building and Safety quietly posted the location and permit status of every billboard structure in the city, KCET mapped the data and drew some conclusions about billboards in Los Angeles. "An early analysis shows that nearly 10 percent have no permit on file," says the station. "In addition, roughly a third of the 5,874 billboard structures in Los Angeles were reported by the city's own inspectors to have possible code violations."

KCET has put together an interactive map so you can see where billboards are located, who the owners are, and the permit status.