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| Titel |
Uncertainties associated with digital elevation models for hydrologic applications: a review |
| VerfasserIn |
S. P. Wechsler |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 11, no. 4 ; Nr. 11, no. 4 (2007-08-03), S.1481-1500 |
| Datensatznummer |
250009402
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| Publikation (Nr.) |
 copernicus.org/hess-11-1481-2007.pdf |
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| Zusammenfassung |
| Digital elevation models (DEMs) represent the topography that drives surface
flow and are arguably one of the more important data sources for deriving
variables used by numerous hydrologic models. A considerable amount of
research has been conducted to address uncertainty associated with error in
digital elevation models (DEMs) and the propagation of error to derived
terrain parameters. This review brings together a discussion of research in
fundamental topical areas related to DEM uncertainty that affect the use of
DEMs for hydrologic applications. These areas include: (a) DEM error; (b)
topographic parameters frequently derived from DEMs and the associated
algorithms used to derive these parameters; (c) the influence of DEM scale
as imposed by grid cell resolution; (d) DEM interpolation; and (e) terrain
surface modification used to generate hydrologically-viable DEM surfaces.
Each of these topical areas contributes to DEM uncertainty and may
potentially influence results of distributed parameter hydrologic models
that rely on DEMs for the derivation of input parameters. The current state
of research on methods developed to quantify DEM uncertainty is reviewed.
Based on this review, implications of DEM uncertainty and suggestions for
the GIS research and user communities are offered. |
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