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Titel |
A virtual environment for the accurate geologic analysis of Martian terrain |
VerfasserIn |
Christoph Traxler, Gerhard Paar, Sanjeev Gupta, Gerd Hesina, Kathrin Sander, Rob Barnes, Bernhard Nauschnegg, Jan-Peter Muller, Yu Tao |
Konferenz |
EGU General Assembly 2015
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Medientyp |
Artikel
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Sprache |
Englisch
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 17 (2015) |
Datensatznummer |
250110359
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Publikation (Nr.) |
EGU/EGU2015-10346.pdf |
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Zusammenfassung |
Remote geology on planetary surfaces requires immersive presentation of the environment to
be investigated. Three-dimensional (3D) processing of images from rovers and satellites
enables to reconstruct terrain in virtual space on Earth for scientific analysis. In this paper we
present a virtual environment that allows to interactively explore 3D-reconstructed Martian
terrain and perform accurate measurements on the surface. Geologists do not only require
line-of-sight measurements between two points but much more the projected line-of-sight on
the surface between two such points. Furthermore the tool supports to define paths of several
points.
It is also important for geologists to annotate the terrain they explore, especially when
collaborating with colleagues. The path tool can also be used to separate geological layers or
surround areas of interest. They can be linked with a text label directly positioned in 3D space
and always oriented towards the viewing direction. All measurements and annotations can be
maintained by a graphical user interface and used as landmarks, i.e. it is possible to fly to the
corresponding locations.
The virtual environment is fed with 3D vision products from rover cameras, placed in the
3D context gained from satellite images (digital elevations models and corresponding ortho
images). This allows investigations in various scales from planet to microscopic level in a
seamless manner.
The modes of exploitation and added value of such an interactive means are
manifold. The visualisation products enable us to map geological surfaces and
rock layers over large areas in a quantitative framework. Accurate geometrical
relationships of rock bodies especially for sedimentary layers can be reconstructed and the
relationships between superposed layers can be established. Within sedimentary
layers, we can delineate sedimentary faces and other characteristics. In particular,
inclination of beds which may help ascertain flow directions can be accurately
quantified. Overall, we are able to construct digital models of rock outcrops that
assist in identification of ancient sedimentary environments that may have been
habitable.
Representative examples and further information about the interactive 3D
visualization tool can be found on the FP7-SPACE Project PRoViDE web page
http://www.provide-space.eu/interactive-virtual-3d-tool/.
The research leading to these results has received funding from the European Union’s
Seventh Framework Programme (FP7/2007-2013) under grant agreement n˚ 312377
“PRoViDE”. |
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