Sometimes people who work on films do forget the names of places where they filmed. Although, if this guy writes a book, he should have done the research and got everything right . I've seen directors bungle the location names of shooting locations, even getting the name of the suburb wrong. I assume the company that produces the film (Paramount, in the case of GF) scouts the location. Maybe the director will go along. The details, address, things like that, are probably only kept as record by the production company. All the people working on the film just remember the locations and addresses long enough to know where to show up.