Earth Imaging Journal: Remote Sensing, Satellite Images, Satellite Imagery
Breaking News
Map of the month: GfK Purchasing Power Europe 2017
Europeans have an average of €13,937 available for spending...
.Earth Domain Celebrates Second Anniversary By Making a Positive Impact Both Online and Offline
Interlink Co., Ltd., the official operator of the .Earth...
SSL Selected to Conduct Power and Propulsion Study for NASA’s Deep Space Gateway Concept
PALO ALTO, Calif. - SSL, a business unit of...
Esri Collaborates with Mobileye to Bring Real-Time Sensor Data to Public Transit
REDLANDS, Calif.— Esri, the global leader in spatial analytics,...
CTIA Calls on FAA to Recognize That Commercial Wireless Networks Offer Best Platform to Support Fast-Growing Drone Market
WASHINGTON - CTIA, the wireless association, today called on the...

Click image to enlarge.

The image at left shows the eastern part of Grand Canyon National Park in northern Arizona, near 36 degrees north latitude and 112.1 degrees west longitude. It is a composite of two pieces: a synthetic natural color image captured on July 14, 2011, draped over a 3-D model of the area. The images and stereoscopic data behind the model were acquired by the advanced spaceborne thermal emission and reflection radiometer (ASTER) sensor on NASA's Terra spacecraft.

The perspective is from east to west, looking down the channel of the Colorado River. North is to the right. In this view, the canyon spans 9 miles (14.5 kilometers) at its widest point and 5,600 feet (1,707 meters) from rim to riverbed. The North Rim and Walhalla Plateau stand out on the right side, while Grand Canyon Village rests on the high plateau at upper left.

On Oct. 17, 2011, NASA and Japan's Ministry of Economy, Trade and Industry (METI) released a significantly improved version of a digital topographic map of Earth based on data from ASTER. Known as a global digital elevation model, the map was created from stereo-pair images; that is, sets of two slightly offset 2-D images were merged to create the 3-D effect of depth.

NASA and METI released the model’s first version in June 2009. The 2011 version adds 260,000 stereo-pair images to improve spatial resolution, increase horizontal and vertical accuracy, and provide more realistic coverage over water bodies. ASTER uses 14 spectral bands (from visible to thermal infrared wavelengths) and spatial resolution of 15 to 90 meters (about 50 to 300 feet) to map 99 percent of Earth's landmass from 83 degrees north latitude to 83 degrees south.

Click here for more details on the new topographic map.

NASA image provided courtesy of the NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team.

Caption by Michael Carlowicz and Alan Buis.

Comments are closed.