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2015 ; 11
(2
): 361-370
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Glaciated valleys in Europe and western Asia
#MMPMID27019665
Prasicek G
; Otto JC
; Montgomery DR
; Schrott L
J Maps
2015[Mar]; 11
(2
): 361-370
PMID27019665
show ga
In recent years, remote sensing, morphometric analysis, and other computational
concepts and tools have invigorated the field of geomorphological mapping.
Automated interpretation of digital terrain data based on impartial rules holds
substantial promise for large dataset processing and objective landscape
classification. However, the geomorphological realm presents tremendous
complexity and challenges in the translation of qualitative descriptions into
geomorphometric semantics. Here, the simple, conventional distinction of V-shaped
fluvial and U-shaped glacial valleys was analyzed quantitatively using
multi-scale curvature and a novel morphometric variable termed Difference of
Minimum Curvature (DMC). We used this automated terrain analysis approach to
produce a raster map at a scale of 1:6,000,000 showing the distribution of
glaciated valleys across Europe and western Asia. The data set has a cell size of
3 arc seconds and consists of more than 40 billion grid cells. Glaciated U-shaped
valleys commonly associated with erosion by warm-based glaciers are abundant in
the alpine regions of mid Europe and western Asia but also occur at the margins
of mountain ice sheets in Scandinavia. The high-level correspondence with field
mapping and the fully transferable semantics validate this approach for automated
analysis of yet unexplored terrain around the globe and qualify for potential
applications on other planetary bodies like Mars.
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