Lithological maps contain information about the different lithotypes cropping out in an area. At variance with geological maps, portraying geological formations, lithological maps may differ as a function of their purpose. Here, we describe the preparation of a lithological map of Italy at the 1:100 000 scale, obtained from classification of a comprehensive digital database and aimed at describing geomechanical properties. We first obtained the full database, containing about 300 000 georeferenced polygons, from the Italian Geological Survey. We grouped polygons according to a lithological classification by expert analysis of the 5456 original unique descriptions of polygons, following compositional and geomechanical criteria. The procedure resulted in a lithological map with a legend including 19 classes, and it is linked to a database allowing ready interpretation of the classes in geomechanical properties and is amenable to further improvement. The map is mainly intended for statistical and physically based modelling of slope stability assessment and geomorphological and geohydrological modelling. Other possible applications include geoenvironmental studies, evaluation of river chemical composition, and estimation of raw material resources. The dataset is publicly available at https://doi.org/10.1594/PANGAEA.935673 (Bucci et al., 2021).

中文翻译：

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用于地质力学建模的 1:100 000 比例的意大利新数字岩性图

岩性图包含有关一个地区出现的不同岩型的信息。与描绘地质构造的地质图不同，岩性图可能因其用途而异。在这里，我们描述了在1:100 000处准备意大利岩性图尺度，从综合数字数据库的分类中获得，旨在描述地质力学特性。我们首先从意大利地质调查局获得了包含大约 300 000 个地理参考多边形的完整数据库。我们通过专家分析 5456 个原始独特的多边形描述，按照岩性分类对多边形进行分组，遵循成分和地质力学标准。该程序生成了一个带有图例的岩性图，包括 19 个类别，并且它与一个数据库链接，允许对地质力学属性中的类别进行即时解释，并且可以进一步改进。该地图主要用于边坡稳定性评估的统计和物理建模以及地貌和地质水文建模。其他可能的应用包括地质环境研究、河流化学成分评估和原材料资源估算。该数据集可在 https://doi.org/10.1594/PANGAEA.935673 上公开获得（Bucci 等人，2021 年）。