The News Courier in Athens, Alabama

Lifestyle

October 24, 2012

Google cameras map popular Grand Canyon trails

(Continued)

Google launched its Street View feature in 2007 and has expanded from 5 U.S. cities to more than 3,000 in 43 countries. Google teams and volunteers have covered more than 5 million miles with the Street View vehicles on a scale that other companies haven't approached, said Mike Dobson, president of Telemapics, a company that monitors mapping efforts.

"You could safely say that it's a standout, well-used application and they don't really have any competition," he said.

As the sun rose Monday, Luc Vincent, Google engineering director, strapped on one of the 40-pound backpacks and set down the Bright Angel Trail to the Colorado River — a nearly 10-mile hike that goes from 6,900 feet in elevation to 2,400 feet. He hiked back up from Phantom Ranch, which can be 30 degrees warmer than at the rim, through the South Kaibab Trail and also gathered data on other trails.

The so-called trekker captures images every 2.5 seconds with 15 cameras that are 5 megapixels each, from the rest areas, the steep switchbacks, the change from juniper trees to scrub brush and the traffic that moves aside as a courtesy to mule riders.

The GPS data is limited, so Google must compensate with sensors that record temperature, vibrations and the orientation of the device as it changes, before it stiches the images together and makes them available to users in a few months, Falor said.

Hikers that were on the trail when the data was gathered will have their faces blurred — an attempt by Google to ensure privacy. Street View has run into problems in places like Europe and Australia for scooping up information transmitted over unsecured wireless networks.

A removable hard drive on the trekker stores the data gathered at the Grand Canyon. Tourists looked at the trekker strangely this week, as if it was something from outer space.

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