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

OROZCO, NATALIA; EUILLADES, LEONARDO; EUILLADES, LEONARDO; GROSSE, PABLO

Tucumán

Congreso; XX Congreso Geológico Argentino; 2017

Asociación Geológica Argentina

In this work, we analyze the effect of Digital Elevation Model (DEM) resolution in the delimitation of volcanic edifices. We profit of NETVOLC, a semi-automated tool capable of delimiting volcanic edifices with limited user intervention, that has been extensively applied using DEMs of both medium (SRTM 90 m DEM) and high (NED 10 m DEM) resolutions. Here, we process a set of small to 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 than 1 km are successfully defined only using the 12 m resolution DEM, whereas volcanoes larger than 1 km are delimited successfully with all three resolution DEMs, although better detail is obtained with the 12 and 30 mDEMs. However, increasing DEM spatial resolutionmeans increasing the computation effort of volcanic edifice delimitation. Thus, new processing strategies are mandatory for computing complex cases when high resolution DEMs are employed.