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Topic: Topography

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	Shuttle Radar Topography Mission
		The Shuttle Radar Topography Mission (SRTM) obtained elevation data on a near-global scale to generate the most complete high-resolution digital topographic database of Earth.
		An edited version of "The Shuttle Radar Topography Mission, Rev. Geophys., 45, RG2004, doi:10.1029/2005RG000183" was recently released.
		Version 2 is the result of a substantial editing effort by the National Geospatial Intelligence Agency and exhibits well-defined water bodies and coastlines and the absence of spikes and wells (single pixel errors), although some areas of missing data ('voids') are still present.
	www2.jpl.nasa.gov /srtm (399 words)

	Topography Summary
		Topography is the physical shape of the land, particularly as it relates to elevation.
		Topography is a general term in geography, derived from the Greek "topos" (place) and "graphein" (to draw), and refers to the lie of the land, or various other characteristics of Physical geography in a region; this is usually expressed in terms of the elevation, slope, and orientation of terrain features.
		Topography is critical militarily because it determines the ability of armed forces to take and hold areas, and to move troops and material into and through areas.
	www.bookrags.com /Topography (1057 words)

	Topography - Wikipedia, the free encyclopedia
		Topography is a general term in geography, derived from the Greek "topos" (place) and "graphein" (to draw), and refers to the lie of the land, or various other characteristics of Physical geography in a region; this is usually expressed in terms of the elevation, slope, and orientation of terrain features.
		In terms of environmental quality, agriculture, and hydrology, understanding the topography of an area enables the understanding of watershed boundaries, drainage characteristics, water movement, and impacts on water quality.
		Topography is critical militarily because it determines the ability of armed forces to take and hold areas, and to move troops and material into and through areas.
	en.wikipedia.org /wiki/Topography (476 words)

	Dynamic topography
		The anomalous topography under the eastern African plateau is the result of the portion of the density anomaly in the upper mantle (325-525 km).
		With the caveat that mantle flow models tend to overpredict the magnitude of dynamic topography, we suggest that the deep low-velocity anomaly under Africa, as seen consistently in tomographic models, is the primary cause of the African superswell.
		Colin, P. and Fleitout, L. Topography of the ocean floor: thermal evolution of the lithosphere and interaction of mantle heterogeneities with the lithosphere.
	cas.bellarmine.edu /tietjen/images/dynamic_topography.htm (2876 words)

	Karst topography - Wikipedia, the free encyclopedia
		Karst topography is a landscape of distinctive dissolution patterns often marked by underground drainages.
		Erosion along limestone shores, common in the tropics, produces typical karst topography, including a sharp makatea surface above the normal reach of the sea and undercuts that are mostly the result of biological activity or bioerosion at or a little above mean sea level.
		Water supplies from wells in karst topography are inherently hazardous, as the well water may simply run from a sinkhole in a cattle pasture through a cave and to the well, bypassing the normal filtering that occurs in a porous aquifer.
	en.wikipedia.org /wiki/Karst (1052 words)

	Topography
		Chicago's flat topography is the result of its origin as a lake bottom.
		On at least three occasions between 14,500 and 4,000 years ago, glacial Lake Chicago, as this temporary enlargement of Lake Michigan was known, rose and fell.
		Rolling topography associated with the Valparaiso moraine occurs in a wide swath around the southern end of Lake Michigan and includes the hills of such communities as Barrington, Wheaton, and Monee.
	www.encyclopedia.chicagohistory.org /pages/1260.html (666 words)

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