Polygonal terrains on Mars
نویسندگان
چکیده
منابع مشابه
Mars: Fretted and Chaotic Terrains
Fretted and chaotic terrains are members of a larger family of lowland terrains on the Martian surface. They have formed in equatorial and midnorthern latitudes, within areas reasonably proximate to the extensive volcanic fields of that region. Both are relatively recent developments. Fretted terrain is characterized by extensive, smooth, lowland plains separated from the old cratered upland by...
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Mariner 6 and 7 pictures show that craters are the dominant landform on Mars and that their occurrence is not correlated uniquely with latitude, elevation, or albedo markings. Two distinct morphological classes are recognized: small bowl-shaped and large flat-bottomed. The former show little evidence of modifications, whereas the latter appear generally more modified than hmar upland craters of...
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Background: The success of recent missions has led to important advances in our understanding of the martian fluvial record. There has been considerable expansion in the number and extent of mapped valley networks [1], as well as recognition of many valley-related sedimentary deposits [e.g., 2]. These new data also revealed that many valley systems feed basins with outlets, implying that numero...
متن کاملFast Polygonal Approximation of Terrains and Height Fields
Several algorithms for approximating terrains and other height fields using polygonal meshes are described, compared, and optimized. These algorithms take a height field as input, typically a rectangular grid of elevation data H(x, y), and approximate it with a mesh of triangles, also known as a triangulated irregular network, or TIN. The algorithms attempt to minimize both the error and the nu...
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The OMEGA/Mars Express hyperspectral imager identified hydrated sulfates on light-toned layered terrains on Mars. Outcrops in Valles Marineris, Margaritifer Sinus, and Terra Meridiani show evidence for kieserite, gypsum, and polyhydrated sulfates. This identification has its basis in vibrational absorptions between 1.3 and 2.5 micrometers. These minerals constitute direct records of the past aq...
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ژورنال
عنوان ژورنال: Finisterra
سال: 2012
ISSN: 0430-5027
DOI: 10.18055/finis1378