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[email protected] Numbers displayed above are based on latest data collected. For more information visit www.intechopen.com 18 Integrated Morphometric Analysis in GIS Environment Applied to Active Tectonic Areas Rosa Nappi and Giuliana Alessio Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Napoli, Osservatorio Vesuviano Italy 1. Introduction This chapter describes a methodology for constraining the structural lineaments in active tectonic areas by integrating morphological and morphometrical data derived by DEMs (Digital Elevation Models) processing, with different geophysical data, as local seismicity and ground deformation data. Furthermore, validation of the lineaments extracted from DEM is carried out by looking over geological and geomorphological maps of literature, available aerial photo and field surveys reports (Fig.1). Fig. 1. Flow chart describing the methodology applied for investigating active tectonic areas. www.intechopen.com 358 Earthquake Research and Analysis – Seismology, Seismotectonic and Earthquake Geology The morphometric parameters of the terrain slope, terrain aspect, profile curvature, tangential curvature and topographic residual surface are chosen for identifying the linear continuity of the morphostructural features observed on the DEM.