Digital engineering geological map of Bavaria 1:25,000 (dIGK25) — WMS

The digital engineering geological map of Bavaria 1:25,000 (dIGK25) is a thematic map on an overview scale. With regard to the delimitation of the units, it is derived directly from the current state of the digital geological map of Bavaria 1:25,000 (dGK25), according to the approach of an integrated mapping. The map shows the building ground types of the main geological units at the site surface (surface map). A building ground type is defined by similar building ground geological or geotechnical properties. Currently 33 types (legal units) are distinguished in Bavaria, roughly divided into loose rocks, variable solid rocks and solid rocks. The data set contains the following information on the building ground types in Bavaria: a basic characterisation or description (Legendentext building ground type), examples of characteristic rocks, examples of possible characteristic soil groups according to DIN 18196, a qualitative classification of the average load capacity, and, in addition, a general ground indication. The assignment of the main geological units to building ground types and the indication of the building ground information is carried out by evaluating and interpreting the available geoscientific technical data (e.g. nature, composition and origin). Here, each main unit is described individually for itself purely rock-related in their Bavarian-wide training. Possible local features, such as topography, facies transitions or, if necessary, complex layer storage are not taken into account. Technical data underlying the evaluation are essentially: the attributes of the dGK25, the geological general legend of Bavaria, textual explanations and manuscripts of geological maps, information on geohazards (georisk objects) and specialist literature on basic geotechnical questions. The data set of the dIGK25 provides the basis for large-scale observations or rough site-based pre-information on an overview scale and is intended to draw attention to potentially sensitive basic building conditions. The designated areas correspond to those of the main geological units of the dGK25. Accordingly, they show the spatial distribution of the near-surface rocks below the ground zone at about 2 m depth. The accuracy of the representation depends on the geological conditions, it is at best 25 m according to the processing scale and is therefore generally not accurate. From the digital engineering geological map (dIGK25) no plot-sharp detailed descriptions or concrete indications of lower-lying rocks and geologic properties can be derived directly. At the specific place, the rock or its expression may differ from the information provided. The technical data correspond to the current state of knowledge of the Bavarian State Office for the Environment. Although they are regularly revised and updated, no guarantee of their completeness and accuracy can be given. The engineering geological map therefore contains no binding assessments of the building ground geological situation and in no case replaces a case-related ground study according to DIN EN 1997-2 or a geotechnical assessment according to Eurocode 7.巴伐利亚州1:25000数字工程地质图（digital engineering geological map of Bavaria 1:25,000，缩写dIGK25）是一幅概览比例尺专题地图。关于地质单元的圈定，其直接源自巴伐利亚州1:25000数字地质图（digital geological map of Bavaria 1:25,000，缩写dGK25）的现行版本，遵循一体化填图的技术思路。该地图展示了场地表层（表层图）主要地质单元对应的建筑地基类型。建筑地基类型由具备相似建筑地基地质或岩土工程特性的单元定义。目前巴伐利亚州共区分33类建筑地基法定单元，大致可划分为松散岩土体、半固结岩体与完整固结岩体三大类。本数据集涵盖巴伐利亚州建筑地基类型的如下信息：基础特征描述或说明（建筑地基类型图例文本）、典型岩石示例、符合DIN 18196标准的典型土组示例、平均承载能力的定性分级，以及通用场地指示信息。将主要地质单元归并至建筑地基类型并标注相关地基信息的过程，需通过评估和解译现有地学技术数据（如岩性、组成与成因）完成。此处每个主要地质单元仅基于其在巴伐利亚全州范围内的岩石相关特性进行独立描述，未纳入地形、相变或必要时的复杂层状储层等局部特征。支撑本次评估的技术数据主要包括：dGK25的属性信息、巴伐利亚州地质通用图例、地质图的文字说明与原始手稿、地质灾害（地质风险对象）相关资料，以及基础岩土工程问题的专业文献。dIGK25数据集可为概览比例尺下的大范围观测或基于场地的粗略前期信息提供支撑，旨在警示潜在的敏感基础建筑场地条件。其划定区域与dGK25的主要地质单元范围完全一致，因此展示了地表以下约2米深度范围内的近地表岩石空间分布特征。该地图的表示精度取决于地质条件，按成图比例尺最高可达25米，整体精度有限。无法直接从巴伐利亚州1:25000数字工程地质图（dIGK25）中获取精确到地块的详细描述，或深部岩石与地质特性的具体信息。在特定场地，岩石及其表现可能与图中提供的信息存在差异。本技术数据符合巴伐利亚州环境局的现行认知水平。尽管会定期进行修订与更新，但无法保证其完整性与准确性。因此，该工程地质图不包含建筑地基地质状况的强制性评估结论，且绝不能替代符合DIN EN 1997-2标准的场地专项岩土勘察，或依据《欧洲规范7（Eurocode 7）》开展的岩土工程评估。