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SRTM Virginia IMAGES


Information on:
Hi-Res. Tiff | Anaglyph: Massanutten Mountain, Virginia, USA
Hi-Res. Tiff | Shaded Relief with Height as Color: Shenandoah National Park, Virginia, USA
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Anaglyph

AnaglyphMassanutten Mountain lies in the Shenandoah Valley of northern Virginia. Rock layers in the mountain are folded downward in an overall "U" shape (called a syncline) which accounts for its peculiar double ridge shape with a highly elongated valley between. The ridges have formed because they are capped with a sandstone layer which is resistant to weathering and erosion.  Limestone and shale are less resistant and form the lowlands and valleys.  The north and south forks of the Shenandoah River flank Massanutten Mountain and display unusually pronounced meander patterns.  Other layered sedimentary rocks form other ridgeline patterns in the Allegheny Mountains, to the upper left.  But the igneous and metamorphic (crystalline) rocks of the Blue Ridge Mountains erode into a very different topographic pattern to the southeast.  This small area provides an excellent example rock type, geologic structure, and fluvial (stream) processes all influencing landform development.

This anaglyph was produced by first shading a preliminary elevation model from data acquired by the Shuttle Radar Topography Mission. The stereoscopic effect was then created by generating two differing perspectives, one for each eye. When viewed through special glasses, the result is a vertically exaggerated view of the Earth's surface in its full three dimensions. Anaglyph glasses cover the left eye with a red filter and cover the right eye with a blue filter.

Elevation data used in this image were acquired by the Shuttle Radar Topography Mission aboard the Space Shuttle Endeavour, launched on February 11, 2000. The mission used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar that flew twice on the Space Shuttle Endeavour in 1994. The Shuttle Radar Topography Mission was designed to collect three-dimensional measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter-long (200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Geospatial-Intelligence Agency of the U.S. Department of Defense, and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Earth Science Enterprise, Washington, DC.

Size: 49 x 37 kilometers (30 x 23 miles)
Location: 38.8 deg. North latitude, 78.5 degrees West longitude
Orientation: North toward the top
Image Data: Anaglyph of SRTM elevation model
Date Acquired: February 2000

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Shaded Relief with Height as Color

Shaded Relief with Height as Color Shenandoah National Park lies astride part of the Blue Ridge Mountains, which form the southeastern range of the greater Appalachian Mountains in Virginia.  The park is well framed by this one-degree of latitude (38-39 north) by one-degree of longitude (78-79 west) cell of Shuttle Radar Topography Mission data, and it appears here as the most prominent ridge trending diagonally across the scene. Skyline Drive, a 169-kilometer (105-mile) road that winds along the crest of the mountains through the length the park, provides vistas of the surrounding landscape.  The Shenandoah River flows through the valley to the west, with Massanutten Mountain standing between the river's north and south forks.  Unusually pronounced meanders of both river forks are very evident near the top center of this scene. Massanutten Mountain itself is an unusually distinctive landform also, consisting of highly elongated looping folds of sedimentary rock.  The rolling Piedmont country lies to the southeast of the park, with Charlottesville located at the bottom center of the scene.

Two visualization methods were combined to produce this image: shading and color coding of topographic height. The shade image was derived by computing topographic slope in the north-south direction. Northern slopes appear bright and southern slopes appear dark. Color coding is directly related to topographic height, with green at the lower elevations, rising through yellow, red, and magenta, to bluish-white at the highest elevations.

Elevation data used in this image were acquired by the Shuttle Radar Topography Mission aboard the Space Shuttle Endeavour, launched on February 11, 2000. The mission used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar that flew twice on the Space Shuttle Endeavour in 1994. The Shuttle Radar Topography Mission was designed to collect three-dimensional measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter-long (200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Geospatial-Intelligence Agency of the U.S. Department of Defense, and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Earth Science Enterprise, Washington, DC.

Size: 111 by 87 kilometers (69 by 54 miles)
Location: 38-39 degrees North latitude, 78-79 degrees West longitude
Orientation: North toward the top
Image Data: Shaded and colored SRTM elevation model
Date Acquired: February 2000

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