Geomorphic classification of Icelandic and Martian volcanoes: Limitations of comparative planetology research from LANDSAT and Viking orbiter images

Details Geomorphic classification of Icelandic and Martian volcanoes: Limitations of comparative planetology research from LANDSAT and Viking orbiter images Geomorphic classification of Icelandic and Martian volcanoes: Limitations of comparative planetology research from LANDSAT and Viking orbiter images

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gmgm.rept...62w&link_type=abstract

In NASA. Goddard Space Flight Center Global Mega-Geomorphology p 62-63 (SEE N85-32357 21-42)

Computer Science

Classifications, Geomorphology, Iceland, Imagery, Landsat Satellites, Mars Volcanoes, Planetology, Viking Orbiter Spacecraft, Comparison, Multispectral Band Scanners

Scientific paper

Some limitations in using orbital images of planetary surfaces for comparative landform analyses are discussed. The principal orbital images used were LANDSAT MSS images of Earth and nominal Viking Orbiter images of Mars. Both are roughly comparable in having a pixel size which corresponds to about 100 m on the planetary surface. A volcanic landform on either planet must have a horizontal dimension of at least 200 m to be discernible on orbital images. A twofold bias is directly introduced into any comparative analysis of volcanic landforms on Mars versus those in Iceland because of this scale limitation. First, the 200-m cutoff of landforms may delete more types of volcanic landforms on Earth than on Mars or vice versa. Second, volcanic landforms in Iceland, too small to be resolved or orbital images, may be represented by larger counterparts on Mars or vice versa.

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