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This is as far as Google Maps Street View will take you in North Oaks, Minn., before it politely takes a right turn.

(Credit: Google)

A small town in Minnesota has told Google that its Street View feature can hit the road.

North Oaks, a private community of 4,500 residents north of St. Paul, isn't too keen on outsiders traipsing through its privately owned streets--even if is only on the Internet. According to the city's Web site, the roads are privately owned, and a no-trespassing sign greets potential visitors to the city.

So city officials were really unhappy when images of their streets and homes appeared on the Google Maps Street View feature, which presents a view of dozens of United States cities from a driver's perspective.

The North Oaks City Council sent the Internet search giant a letter in January demanding that images be removed or risk being cited for trespassing, the Minneapolis Star Tribune reported.

"It's not the hoity-toity folks trying to figure out how to keep the world away," Mayor Thomas Watson told the newspaper. "They really didn't have any authorization to go on private property."

The company removed the images shortly thereafter, a Google representative told the newspaper.

"This is very rare, where an entire town would request to be taken off," Google spokeswoman Elaine Filadelfo told the paper, adding that the company removes images when individuals make the request.

Google is no stranger to complaints about its Street View service. Not long after the feature launched in May 2007, privacy advocates criticized Google for displaying photographs that included people's faces and car license plates. In May, the company announced that it had begun testing face-blurring technology for the service.

In April, a Pittsburgh couple sued Google over photographs of their home that appeared on the company's site, saying Google should honor a private road sign on their street. It claims that Google's "reckless conduct" has "exposed plaintiff's private information to the public."

For those who weren't exactly comfortable with ordinary photos of their property appearing on the Net, get ready to reveal a little more. A couple of weeks ago, Google confirmed that it is gathering 3D data, along with the photographs it takes for its online Street View service.

Google confirmed today it's gathering 3D data along with the photographs it takes for its online Street View service, a potential boon for those of us who fantasize about flying like Superman through urban landscapes, at least virtually.

"The imaging technology includes lasers that collect 3D geometry data," the company said Thursday in a statement. However, for now at least, the 3D information is just experimental, Google said.

Microsoft's Virtual Earth gives a 3D view of thee world.

(Credit: Microsoft)

Savvy observers, looking at Flickr pictures of Google Street View cars gathering images in Milan, had identified the 3D laser scanners in April. At the time, Google didn't comment at the time, but now has confirmed the scanners as well as the expansion of Google Street View to Europe.

Laser scanners can be used to produce detailed 3D models of buildings or other features, and overlaying photographic imagery can give those models a more lifelike appearance.

Microsoft has been working to add more sophisticated 3D models to its Virtual Earth site, also using automated technology. Microsoft's software lets people cruise above Las Vegas and a few other cities with detailed 3D maps.

The move probably makes sense, given that it's more economical to gather the most information possible while driving around various cities. And of course Google has a lot of room to store 3D data and servers to process it into something useful that combines the 3D scan data with the photographed view.

It's not clear if there are privacy implications from the move. It's certainly possible that giving people the ability to fly through an extremely realistic reconstruction of the world could set off those who got the willies from Street View's debut or, for that matter, the satellite imagery that now seems relatively mundane.

But I'd think twice before trying to sneak that new addition onto the side of your house without getting a building permit.

Update 10:40 a.m. PDT: I added comment from Google and its confirmation that it has indeed begun photographing European cities.

Google Street View would raise problems if brought to Europe, an official with the European Union's data protection agency said Thursday.

Google Street View now blurs some faces in Manhattan.

(Credit: Google)

"Making pictures everywhere is certainly going to create some problems," EU Data Protection Supervisor Peter Hustinx said at a news conference to present his annual report, according to a Reuters report.

Hustinx also said he expected Google would be able to comply with laws.

"Apparently there is the capacity to adapt this in different modes," he said.

Indeed, to address privacy concerns, Google this week began blurring faces shown in Street View.

Google Street View cars sporting cameras have been spotted driving around Paris, Milan, and Rome, but so far the service to provide a driver's-eye view of the world only has U.S. cities online.

Google confirmed it's begun photographing European areas to expand Street View, but said the service will be legal.

"We will not launch in Europe until we are confident that Street View complies with local law, including law relating to the display of images of individuals," the company said. "We'll use technology like automated face-blurring and operational controls such as image removal tools so Street View remains useful and in keeping with local laws and norms wherever it is available."

Google Street View now blurs some faces in Manhattan.

(Credit: Google)

BURLINGAME, Calif.--Google has begun testing face-blurring technology for its Street View service, responding to privacy concerns from the search giant's all-seeing digital camera eye.

The technology uses a computer algorithm to scour Google's image database for faces, then blurs them, said John Hanke, director of Google Earth and Google Maps, in an interview at the Where 2.0 conference here.

Google has begun testing the technology in Manhattan, the company announced on its LatLong blog. Ultimately, though, Hanke expects it to be used more broadly.

Dealing with privacy--both legal requirements and social norms--is hard but necessary, Hanke said.

"It's a legitimate issue," he said. He likened the issues some have with Street View to the ones that took place when Google introduced aerial views to Google Maps. It took time for the public, regulators, and Google to get comfortable with the feature, but, "It needs that debate. We see that and try to let it play out."

John Hanke, head of Google Maps and Google Earth, speaks at the Where 2.0 conference in Burlingame, Calif.

(Credit: Stephen Shankland/CNET News.com)

New jurisdictions, new rules
Street View poses other privacy issues besides just faces. Some people aren't eager to have their houses on display, for example. But much of the hubbub seems to have waned since Google launched Street View in May 2007, and indeed other companies such as Blue Dasher are working on similar technology.

Street View presents a view of dozens of United States cities from a driver's perspective (unless a plastic bag is stuck over the Street View camera). It appears Google has begun collecting imagery in Europe as well, along with detailed 3D maps, including Milan, Rome, and Paris.

A Pittsburg couple sued Google for allegedly photographing images on a private drive in April, but it's legal to take photos from public streets in the United States. However, standards vary.

"A just balance needs to be found between what can be publicized, in deference to the principles of freedom of expression and of information, and what has to be safeguarded from excessive public curiosity, so as to avoid infringing the individual's right to privacy and right to his or her picture," the French embassy observes.

Years of research
The face-blurring technology took a year to develop and is based on prior research that took several more years, Hanke said.

Face detection, which humans perform effortlessly with help from some dedicated neurons in the visual cortex, is a decades-old computer science problem. It's finally arriving in basic form in real-world applications, though, including digital cameras that use it to track and properly expose subjects or take a picture only when subjects are smiling.

There are some potential complications for Google Street View, though. False positives that blur billboards or works of art with faces could degrade Street View a bit, but missing some faces that are visible could pose privacy problems.

Google thinks its technology has struck the right technology balance in general.

"It does a good job of figuring that out. It uses a variety of technologies to filter," Hanke said, though it's "not perfect."

Many times computer algorithms struggle to recognize faces that aren't straightforward views. But that problem isn't as bad for Google: the faces that are obscured by hair, telephone poles, or oblique views are likely the ones identifiable already.

Have you found any examples of faces the algorithm missed or that it should have caught? Share the links or other thoughts in the comments section below.

Privacy advocates should take note of an effective way to avert the prying eyes of Google Street View: the lowly plastic bag.

Google Street View foiled by a plastic bag.

(Credit: Google)

A block of College Road in Fairbanks, Alaska, along with portions of Minnie St. and Third St. show what a driver would see only if wearing a plastic bag on his or her head. As Google Sightseeing observes, you can tell what it is by the fact that it says "plastic bag" on the inside.

So now perhaps we know which scheming multibillion dollar search engine is behind San Francisco's ban on plastic bags.

Google Maps directions now are augmented with Street View imagery, where it's available.

(Credit: Google)

Google has built its Street View into Google Maps' ability to provide driving directions, the company said Tuesday.

With the feature, a small camera icon appears next to the intersections in the turn-by-turn directions. Clicking on the icon brings up a view of the intersection so people can see the area in question.

Google Street View is available in 44 areas of the United States, and there are strong signs Google is bringing Street View to Europe. Street View is available through the Google Maps programming interface so that those using Google Maps can add Street View abilities to their Web sites.

A Google Street View look at CNET headquarters

(Credit: Google)

Google Earth and Maps could cover a lot more territory with a lot more detail soon, if some photos from Italy are anything to judge by.

First, evidenced by Google-branded cars traversing Milan, is the possibility that Google is acquiring European imagery for its Street View feature.

Second is the observation, based on scrutiny of those pictures, that Google could be gathering 3D data along with the photos.

"With an automated solution, they could go for blanket 3D coverage," rather than the more limited approach today involving user contributions of basic 3D models, robotics engineering student Mark Cummins observed on his Educating Silicon blog. Cummins also helpfully included links to work by start-up Earthmine and University of California at Berkeley researchers Avideh Zakhor and Christian Früh to show what others are doing with 3D street-view imaging.

Cummins bases his conclusion on the use of Sick laser scanning equipment, which sends a laser beam back and forth to gauge distances to nearby objects. Laser scanners can produce a 3D model detailed map onto which imagery can be overlaid.

Google wouldn't comment either on any European expansion or on 3D scanning, but both ideas are consistent with the company's general plans for Google Maps and Google Earth.

"We continue to add more cities in Street View," spokesman Larry Yu said. "There are of course laws and regulations to consider abroad, so we looking closely at that." Yahoo has run into some privacy concerns with its street-level imagery.

Of the 3D work, Yu also was unspecific. "We want more 3D data in Google Earth. The latest release of Google Earth is where you'll see the results of our effort to automate the addition of 3D data."

In related news, ValleyWag reported that Google is hiring 300 drivers to map Switzerland.

Trulia builds a Google Street View into its real estate search results in areas where it's available, letting people check the neighborhood of a property for sale.

(Credit: Trulia)

Trulia, a residential real estate search engine, has incorporated Google Maps Street View into its Web pages, the company said Wednesday.

The combination presents Google's view of a particular property from the road and lets users virtually pivot around to see the surrounding area. It works in the 40 cities where Google has supplied imagery for its Street View service.

It's nothing that couldn't have been done manually before by typing an address into a separate window with the Google view, or likely even with an on-page mashup, but having the curbside vantage readily available is certainly handy, and Google worked with Trulia to integrate the feature, the search giant said.

This Rand-McNally road map from 1907 shows detailed directions on the Detroit to Toledo route.

(Credit: Michigan State University Library)

When Google unveiled its Street View service in May, it seemed the entire Internet went a little crazy.

But now, thanks to Google Blogoscoped, I was looking at some 1907 Rand-McNally "photo auto" images, which show close-ups of specific turns on the Detroit to Toledo driving route, and it's obvious that Google was fully 100 years behind.

These images are great: They show the specific directions that someone would have to take to go along this route, and they bear a striking resemblance to the images Google put up with Street View.

Which just goes to show that Web 2.0 is not always ahead of its time. Sometimes, you have to turn to Web 0.01. Or something like that.