Surprises Lurk in Satellite Snaps By Daniel Terdiman Story location: http://www.wired.com/news/technology/0,1282,67190,00.html
02:00 AM Apr. 13, 2005 PT For many years, Mike Leeds has been road-tripping from his home in Portland, Oregon, to Nevada's Black Rock Desert for the Burning Man arts festival. So last week, when Google announced its new Maps service, which includes the ability to view and navigate with high-resolution satellite images, Leeds couldn't resist tracing his 500-mile route, one screen at a time, to see what he drives by on his annual round trip. He never expected that the last of his "45 miles to the click" route images would show, in great detail, the early setup of Burning Man. click to see video See photos Indeed, it is possible to see in the satellite image the complete layout of the streets and infrastructure of Black Rock City, the makeshift town around which Burning Man, a countercultural festival held late each summer, is built. But the unexpected appearance of the pre-event Burning Man construction is hardly the only surprise in Google's database of satellite images. And other satellite imagery companies say that they, too, are often startled by what they find when they analyze the hundreds of shots they take daily. Notable surprises include a just-erupted volcano, violent scenes from Iraq (a bomb going off in Baghdad and a firefight in Najaf) and even a 747 landing in Tokyo, something difficult to capture given that the satellite is moving at 17,000 mph. (See the picture gallery at left.) "Part of it is that we collect so much imagery that a lot of times no eyes have seen a lot of this stuff," said Chuck Herring, director of marketing communications at DigitalGlobe, a major player in the commercial satellite imagery business. "And so (we) go to an area, pop it open, and wow, we didn't intend to capture this icebreaker pushing this submarine." Although satellite imagery has been generally available in one form or another for years, Google's launch of the image database it got when it purchased Keyhole last fall is likely to dramatically increase public interest in the technology, especially since so many people are already using Google's service for mapping, driving directions and even creative projects like annotating maps of places they've lived. "What (Google is) doing for text-based searches, they wanted to start doing for geospatial, so that could bring satellite imagery down to earth, if you will," said Mark Brender, vice president of corporate communications at Space Imaging, another owner and distributor of satellite-imaging technology. "It was the Babylonians in 2300 B.C. that first etched the lay of the land on clay tablets. Google will be taking this to a whole new level." In most circumstances, the interesting things in satellite images are captured intentionally, as were pictures of the floods of people jamming into the Vatican after the death of the pope. But sometimes, Brender said, he and his scientists find things they weren't counting on. In fact, he said, the first image Space Imaging ever sold -- a shot of the Washington Monument from 1999 -- included something no one had expected: two presidential helicopters just north of the obelisk. Brender also recalls the image of a love note carved into a Texas cornfield, in which someone scrawled, "I love Donna." Unfortunately, Brender said, the guy didn't get the girl. "We called the local paper," he said. "He was expressing his love, and she did not receive it, no matter how big the valentine." DigitalGlobe's Herring said his company, which along with EarthSat provides Keyhole's images, is accustomed to inadvertently finding unlikely nuggets among its 430,000-plus pictures. Perhaps the most notable, he said, are a series of images of the Indian Ocean tsunami slamming the coast of Sri Lanka in which the swirling ocean is easily visible. The company's satellite had flown over Sri Lanka precisely as the country was getting pounded on the morning of Dec. 26, 2004. "We had a lot of interactions with people in southwest Sri Lanka," Herring said. "They were overwhelmed by it. Across the board, the reaction was they were pretty impressed and awed that this image was captured while it was going on." Google's database, naturally, is the one getting most of the attention right now. The service's popularity is part of the reason users are discovering things such as San Francisco's famous Castro Street Fair, and even pro sporting events involving the San Francisco 49ers and thePhiladelphia Phillies. "I was initially focused on the usability of the images as a way to help people navigate," said John Hanke, general manager of the Keyhole group at Google. "So I didn't anticipate the fascination that people would have for poring through these images looking for anomalies." Hanke explained that the Keyhole database included as much as 15 terabytes of images when Google bought it, and that the company refreshes images about once every 18 months. He also explained that because of things like fog and clouds, specific regional satellite images can be a composite of several stitched-together pictures. That reality leads people like Leeds to wonder if images like the Burning Man setup and the Castro Street Fair show up because Google or Keyhole employees wanted them to be there. But Hanke prefers to focus on the excitement users are getting looking for the unexpected. "It's kind of like playing one of those adventure games," he said, "where you have to click on every part of the screen to find that box that will open." End of story You are a subscribed member of the infowarrior list. 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