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| Titel |
On the potential of very high-resolution repeat DEMs in glacial and periglacial environments |
| VerfasserIn |
J. Abermann, A. Fischer, A. Lambrecht, T. Geist |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 4, no. 1 ; Nr. 4, no. 1 (2010-01-25), S.53-65 |
| Datensatznummer |
250001545
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| Publikation (Nr.) |
 copernicus.org/tc-4-53-2010.pdf |
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| Zusammenfassung |
| The potential of high-resolution repeat DEMs was investigated for
glaciological applications including periglacial features (e.g. rock
glaciers). It was shown that glacier boundaries can be delineated using
airborne LIDAR-DEMs as a primary data source and that information on debris
cover extent could be extracted using multi-temporal DEMs. Problems and
limitations are discussed, and accuracies quantified. Absolute deviations of
airborne laser scanning (ALS) derived glacier boundaries from ground-truthed
ones were below 4 m for 80% of the ground-truthed values. Overall, we
estimated an accuracy of +/−1.5% of the glacier area for glaciers larger
than 1 km2. The errors in the case of smaller glaciers did not exceed
+/−5% of the glacier area. The use of repeat DEMs in order to obtain
information on the extent, characteristics and activity of rock glaciers was
investigated and discussed based on examples. |
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