Geotechnical parametrization of the lithological map of Italy

Exploiting data/information derived from literature the lithological map proposed by Bucci et al. (2022) for the Italian territory was characterised in terms of geotechnical parameters. The result is made available to the public as a GIS vector layers in a standard format. In the attribute table of the layer, the 25th percentile, median and 75th percentile of the values of three geotechnical parameters (i.e., cohesion, friction angle, and porosity) are reported, with the following field names: “cohesion_25percentile_Mpa”, “cohesion_75percentile_Mpa”, “cohesion_median_MPa”, “friction_angle_25percentile_degrees”, “friction_angle_75percentile_degrees”,“friction_angle_median_degrees”, “porosity_25percentile_percentage”, “porosity_75percentile_percentage”, “porosity_median_percentage”. In addition, for each geotechnical parameter, the quartile coefficient of variation (QCV) is listed in the attribute table: “cohesion_QCV”, “Friction_angle_QCV”, “Porosity_QCV”.The values shown in the maps are not suitable for local-scale applications, as they are derived from small-scale cartography and are not capable and reliable to accurately represent local lithotype variations.