A first shot from DigitalGlobe's WorldView-2 satellite shows the AT&T Center in San Antonio, Texas.
(Credit: DigitalGlobe)
The Henry B. Gonzalez Convention Center San Antonio, Texas, where DigitalGlobe is showing off its first images for the GeoInt 2009 conference.
(Credit: DigitalGlobe)Twelve days after it launched WorldView-2 into orbit, DigitalGlobe has released its first images from the satellite, which will supply high-resolution photography for Google's and Microsoft's online mapping services.
The first images are of two locations in San Antonio, Texas, where the company is showing off its work at the GeoInt 2009 Symposium this week, and of Dallas Love Airport.
The quality of the images should improve over these first shots, taken Monday. "More refinements to early-stage images can be expected as the ongoing check-out and calibration continues," DigitaGlobe said.
Microsoft and Nokia sponsored the WorldView-2 launch, but the former's Bing and the latter's Navteq won't be the only services to get the imagery. They'll share it with Google, which has been the sole online beneficiary of images from GeoEye-1, a satellite launched last year by DigitalGlobe rival GeoEye.
The new satellite is able to capture imagery with a resolution fine enough to detect features as small as 0.46 meters, or 1 1/2 feet, on the ground, though federal regulations permit DigitalGlobe to offer images with only a maximum resolution of 0.5 meters for general commercial use, the Longmont, Colo.-based DigitalGlobe said. Other DigitalGlobe satellites with sub-meter resolution in orbit already are QuickBird and WorldView-1.
"WorldView-2 is expected to improve the speed and rate of imagery delivery to the government and commercial markets with large-scale collection capacity and daily revisit rates," meaning that the satellite can photograph the same site multiple times during the same day, the company said. The satellite can capture multispectral imagery--eight bands of light, or more than what's visible to humans--though at a lower resolution of 1.8 meters.
Dallas Love Airport as photographed by WorldView-2.
(Credit: DigitalGlobe)
I spent a good part of yesterday tooling around with the new Google Maps Street View feature. It's one of those Web services that just works. Here at CNET, we're also centrally located in one of the few cities (San Francisco) to have nearly all of its main thoroughfares Street View-enabled. The data for four of the five Street View-enabled cities comes from a company called Immersive Media. In addition to these interactive 3D pictures, they use the same technology for videos. Both use an 11-lens camera called Dodeca 2360 that captures an immensely large surface area of images at a very high resolution. This camera is mounted on top of a moving vehicle that both records video and geodata simultaneously. What we're seeing on Street View are image stills from that video, which is how you're able to get a new shot from nearly every point on a recorded route.
One of my big questions whenever these photographic services come out, is how often the imagery gets updated. I had a meeting earlier in the week with the folks from DigitalGlobe, who provide satellite imagery for Google Earth, and several other private and commercial services. They explained that the aerial and satellite maps we see on these services are generally completely redone every year, with the more populated areas getting more frequent flyovers and subsequent refreshes. In comparison, the level of detail and proportionate work that goes into the tech behind Street View is very resource-intensive. According to Immersive Media, they're typically on the road capturing imagery and data 46 hours a day using multiple vehicles with the mounted cameras.
Daniel Terdiman had an interesting post yesterday about some of the minute details these images have captured, and the inherent security issues. Wired is currently running a best finds contest, and earlier today Mashable posted several user-submitted findings that contain some of the more interesting photos found on the service.
One of the discoveries I've made is a relatively easy way to tell how old these photos are: gas prices. In the case of the Street View photo that's at my nearest station, they're selling a gallon of regular for $2.67--this was obviously taken in better times, and using this site we can pin it down to around August of last year. In other cases, the camera might have captured an electronic sign on a bank, or billboard.
While Street View is really neat, what I'd like to see more than anything is using these photos to enhance driving directions, as it's often easier to spot an exit or street to turn on based on what it looks like rather than rely on tiny little green signs. Considering that the data has come from video footage, a quick highlight reel of turns wouldn't be so bad either.
A gas station on the outskirts of Oakland, Calif., gives us a clue of when this imagery was taken.
(Credit: CNET Networks)
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