Summary: Extraction of Valley Networks in Mars Elevation Maps
D. Günther (1), P. C. McGuire (2, 3), S. Walter (3), T. Weinkauf (4), and H. C. Hege (1)
(1) Zuse Institute Berlin (ZIB), Germany, (2) Department of the Geophysical Sciences, University of Chicago, USA,
(3) Freie Universitaet of Berlin, Germany, (4) Courant Institute of Mathematical Sciences, New York University, USA;
The identification of valley networks and channels is
an essential tool for geomorphological interpretations
of the fluvial, glacial and volcanic history of Mars.
While the creation of valley networks by erosion is
an accepted hypothesis, the flow of water as the sole
cause has recently been put into question . To inves-
tigate the origin of the networks, their detailed prop-
erties have to be mapped at a global scale. In previ-
ous attempts of computer-generated global mapping,
manual verification of the results was necessary .
Herein, we present a novel algorithm to automatically
extract valley networks in terms of extremal lines and
compare the extraction results with manually mapped
ones that were published in [3,4].