IMPORTANCIA DE LA RESOLUCIÓN ESPACIAL DE LOS MODELOS DIGITALES DE ELEVACIÓN (MDE) EN LA DELIMITACIÓN DE EDIFICIOS VOLCÁNICOS HACIENDO USO DE LA HERRAMIENTA NETVOLC

NATALIA OROZCO; LEONARDO D. EUILLADES; PABLO A. EUILLADES; PABLO GROSSE

San Miguel de Tucumán

Congreso; XX Congreso Geológico Argentino; 2017

Asociación Geológica Argentina

Importance of the spatial resolution ofdigital elevationmodels (DEM) for the delimitation ofvolcanic edifices using the Netvolc tool.In this work, we analyze the effect of Digital Elevation Model (DENI)resolution in the delimitation of volcanic edifices. We profit of NETVOLC, asemi-automated tool capable of delimiting volcanic edifices with limited userintervention, that has been extensively applied using DEMs of both medium (SRTM90 m DEM) and high (INED IO m DEM) resolutions. Here, we process a set of smallto medium size volcanoes of the Michoacan-Guanajuato volcanic field (Mexico),using the TanDEM-X DEMs of 12, 30 and 90 mspatial resolutions.Obtained results suggest that volcanic edifices with diameters less than1 km are successfully defined only using the 12 m resolution DEM, whereasvolcanoes larger than I km are delimited successfully with all three resolutionDEMs, although better detail is obtained with the 12 and 30 mDEMs. However, increasingDEM spatial resolution means increasing the computation effort of volcanicedifice delimitation. Thus, new processing strategies are mandatory forcomputing complex cases when high resolution DEMs are employed.