Information gets stale - 'today's news is tomorrow's fish-and-chips wrapping' is the way one saying puts it. And a set of photos of a road are of historical interest rather than being immediately useful if they're not refreshed.
So Google has begun an update of its Street View coverage of Australia.
Beginning this month, the Google Street View cars are back on Australian roads, taking fresh pictures in Sydney, Melbourne, Brisbane, Canberra, Adelaide, Perth and parts of Tasmania.
Product manager Andrew Foster said "we'll be doing our best to cover as many of Australia's public roads as we can during this summer."
Not only will the images be newer, they will also be of higher quality. Foster pointed out that this will have the side effect of making Google's automatic face and numberplate blurring more accurate as those objects will be more easily recognised.
The timetable for displaying the new images on Street View is vague: "sometime within the next year," said Foster.
Will we see a fresh round of privacy complaints? Please read on.
There is no indication from Google that requests for image removal will be carried over to the new set of images.
A privacy infringement case involving the Street View cars entering private land reached a US court, and there was evidence of similar events occurring in Australia.
Last month, the company announced that it would not keep any unblurred images - even for internal use - for longer than one year after they are first published on Street View (or after October 7, 2010, whichever is the later).
Google's global privacy counsel Peter Fleisher said that priority would be given to permanently blurring images that people had specifically asked to be removed from Street View.
Other places where Google is currently collecting or refreshing Street View images include Austria, Belgium, Canada, Czech Republic, Denmark, Finland, France, Germany, Ireland, Italy, Luxembourg, Netherlands, New Zealand, Poland, Portugal, Romania, South Africa, Spain, Sweden, Switzerland, Taiwan, and United Kingdom.
Google recently revealed that it had created a human-powered vehicle to collect 'off-street view' images in areas such as pedestrian malls, parks, and sports venues.