Extraction and Validation of Geomorphological Features from EU-DEM in The Vicinity of the Mygdonia Basin, Northern Greece

World Multidisciplinary Earth Sciences Symposium 2017

Mouratidis, Antonios^1,2 ; Karadimou, Georgia^3 ; Ampatzidis, Dimitrios^4

Department of Physical and Environmental Geography, Aristotle University of Thessaloniki, Thessaloniki

54124, Greece^1

Department of Applied Geoinformation and Cartography, Charles University in Prague, Albertov 6, Praha 2, Prague

128 43, Czech Republic^2

Science, Applications and Future Technologies Department, European Space Agency (ESA/ESRIN), Via Galileo Galilei, Frascati

00044, Italy^3

Federal Agency for Cartography and Geodesy, Richard-Strauss-Allee 11, Frankfurt am Main

60598, Germany^4

关键词: Digital elevation model;    Digital surface model (DSM);    Drainage basin delineation;    Drainage networks;    European Commission;    Geoscience applications;    Global Monitoring for Environment and Security;    Northern Greece;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/95/3/032009/pdf
DOI  :  10.1088/1755-1315/95/3/032009

来源: IOP

【 摘 要 】

The European Union Digital Elevation Model (EU-DEM) is a relatively new, hybrid elevation product, principally based on SRTM DEM and ASTER GDEM data, but also on publically available Russian topographic maps for regions north of 60° N. More specifically, EU-DEM is a Digital Surface Model (DSM) over Europe from the Global Monitoring for Environment and Security (GMES) Reference Data Access (RDA) project - a realisation of the Copernicus (former GMES) programme, managed by the European Commission/DG Enterprise and Industry. Even if EU-DEM is indeed more reliable in terms of elevation accuracy than its constituents, it ought to be noted that it is not representative of the original elevation measurements, but is rather a secondary (mathematical) product. Therefore, for specific applications, such as those of geomorphological interest, artefacts may be induced. To this end, the purpose of this paper is to investigate the performance of EU-DEM for geomorphological applications and compare it against other available datasets, i.e. topographic maps and (almost) global DEMs such as SRTM, ASTER-GDEM and WorldDEM™. This initial investigation is carried out in Central Macedonia, Northern Greece, in the vicinity of the Mygdonia basin, which corresponds to an area of particular interest for several geoscience applications. This area has also been serving as a test site for the systematic validation of DEMs for more than a decade. Consequently, extensive elevation datasets and experience have been accumulated over the years, rendering the evaluation of new elevation products a coherent and useful exercise on a local to regional scale. In this context, relief classification, drainage basin delineation, slope and slope aspect, as well as extraction and classification of drainage network are performed and validated among the aforementioned elevation sources. The achieved results focus on qualitative and quantitative aspects of automatic geomorphological feature extraction from EU-DEM at a water basin level, with the use of Geographical Information Systems (GIS).