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Artículo

NETVOLC: An algorithm for automatic delimitation of volcano edifice boundaries using DEMs

Euillades, Leonardo DanielIcon ; Grosse, PabloIcon ; Euillades, Pablo AndrésIcon
Fecha de publicación: 22/03/2013
Editorial: Elsevier
Revista: Computers & Geosciences
ISSN: 0098-3004
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ciencias de la Computación; Vulcanología

Resumen

Accurately delimiting boundaries is required for characterizing landforms through measurement of their geomorphometric parameters. Volcanism produces a wide range of landforms, from symmetric cones to very irregular massifs, that can gradually merge with the surroundings and contain other elements, thus complicating landform delimitation. Most morphometric studies of volcanoes delimit landforms manually, with the inconvenience of being time-consuming and subjective. Here we propose an algorithm, NETVOLC, for automatic volcano landform delimitation based on the premise that edifices are bounded by concave breaks in slope. NETVOLC applies minimum cost flow (MCF) networks for computing the best possible edifice outline using a DEM and its first- and second-order derivatives. The main cost function considers only profile convexity and aspect; three alternative functions (useful in complex cases) also consider slope, elevation and/or radial distance. NETVOLC performance is tested by processing the Mauna Kea pyroclastic cone field. Results using the main cost function compare favorably to manually delineated outlines in 2/3rds of cases, whereas for the remaining 1/3rd of cases an alternative cost function is needed, introducing some degree of subjectivity. Our algorithm provides a flexible, objective and time-saving tool for automatically delineating volcanic edifices. Furthermore, it could be used for delineating other landforms with concave breaks in slope boundaries. Finally, straightforward modifications can be implemented to extend the algorithm capabilities for delimiting landforms bounded by convex breaks in slope, such as summit craters and calderas.
Palabras clave: Morphometry , Volcano Landform , Digital Elevation Model , Minimum Cost Flow Networks
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/3597
URL: http://www.sciencedirect.com/science/article/pii/S0098300413000757
DOI: http://dx.doi.org/10.1016/j.cageo.2013.03.011
Colecciones
Articulos(CCT - MENDOZA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MENDOZA
Articulos(CCT - NOA SUR)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NOA SUR
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Citación
Euillades, Leonardo Daniel; Grosse, Pablo; Euillades, Pablo Andrés; NETVOLC: An algorithm for automatic delimitation of volcano edifice boundaries using DEMs; Elsevier; Computers & Geosciences; 56; 22-3-2013; 151-160
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