3D building model LoD2-DE Hamburg

3D building model LoD2-EN For the building model LoD2-DE dataset, standardised roof shapes are formed from point clouds (Airborne laser scanning or photogrammetry) fully automated, assigned to the buildings and aligned according to the actual ridge course. The building floor plan is basically taken from the official digital property map and the model is therefore floor plan compliant. The location accuracy corresponds to that of the underlying building floor plan. The height accuracy is approx. ± 1 m. Coarse deviations are possible in individual cases with complex roof shapes. Shared geometry is managed redundantly. The buildings are additionally blended with terrain information of the Digital Terrain Model (DGM) held at the state operation. There is no manual post-processing of the individual models. The modelling corresponds to the AdV product and quality standard for 3D building models. The timeliness of the data base is usually older from the previous year, in the case of ALS point clouds. (Example: The download LoD2-DE 2023 is based on ALKIS floor plans and point clouds from 2022) The building model LoD2-DE is reserved for the entire urban area of Hamburg (about 750 km²), including the island of Neuwerk. The data can be downloaded as a complete record in CityGML V.1.0 format. Further data formats and excerpts can be obtained at [e-mail].3D建筑模型细节层次2（Level of Detail 2，LoD2）-EN 本LoD2-DE建筑模型数据集通过全自动流程，由点云（机载激光扫描或摄影测量）生成标准化屋顶形态，将其匹配至对应建筑，并依据实际屋脊走向完成对齐校正。建筑平面图基本取自官方数字地籍图，因此该模型严格符合平面图规范。其平面位置精度与所用基础建筑平面图的精度保持一致，高度精度约为±1米。针对部分复杂屋顶形态的案例，可能存在较大偏差。共享几何要素采用冗余管理方式。此外，所有建筑模型还将与州级运维机构维护的数字地形模型（Digital Terrain Model，DGM）地形信息进行融合。单模型无需进行人工后处理，该建模流程符合AdV制定的3D建筑模型产品与质量标准。 就机载激光扫描点云而言，数据集的时效性通常为前一年度。示例：2023版LoD2-DE下载数据集基于2022年的ALKIS地籍平面图与点云生成。 本LoD2-DE建筑模型数据集仅覆盖汉堡全市域（约750平方千米），包括诺伊威克岛。 用户可下载城市地理标记语言（CityGML）V1.0格式的完整数据集。如需获取其他数据格式或数据片段，请联系邮箱[e-mail]。