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(Article of periodic en Anglais - 2014)

Document title

Testing techniques to quantify drumlin height and volume : synthetic DEMs as a diagnostic tool

Authors(s) and Affiliation(s)

HILLIER J.K. (1) ; SMITH M.J. (2) ;
(1) Dept. of geography, Univ., Loughborough, ROYAUME-UNI
(2) School of Geography, Geology and the Environment, Univ., Kingston, ROYAUME-UNI

Abstract

This paper undertakes the first quantitative comparison of such readily implementable methods, illustrating the use of statistically representative "synthetic landscapes" as a diagnostic tool. From this analysis, guidelines for quantifying the 3D attributes of drumlins are proposed. Specifically, to avoid obtaining incorrect estimates caused by substantial systematic biases, interpreters should currently take 3 steps : declutter the digital elevation model for estimating glacial bedform height (H) but not volume (V); remove height data within the drumlin; then interpolate across the resultant hole to estimate a basal surface using Delaunay triangulation. Results are demonstrated through analysis of drumlins in an area in western central Scotland. The guidance arguably represents the best current advice for subglacial bedforms in general, highlighting the need for more studies into the quality of mapped data using synthetic landscapes

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2014, vol. 39, no5 [pp. 676-688]

Bibliographic references : 2 p.

Collation : 9 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3530

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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