Digital height model Hamburg — bDOM

image-based Digital Surface Models (bDOM) — Derived, comprehensive digital surface model with a grid width of 1 meter — For the area of the Free and Hanseatic City of Hamburg (without the area of the hamburg Wadden Sea) An image-based digital surface model (bDOM) describes the Earth’s surface and the objects on it, such as structural systems, as regularly distributed, georeferenced high points at the time of recording the aerial images of a photogrammetric image flight (here: Spring flight 2020). The image-based surface models derive from oriented digital aerial images (i.e. R. Dense-Image-Matching). The image-based surface model is created as an intermediate in the production process of digital orthophotos in the quality level TrueDOP. The data are available in the following system: Location: ETRS89_UTM32 (reference system ETRS89, figure UTM; EPSG code: 25832, obsolete name: Status 310) Height: DE_DHHN2016_NH (Normal heights of the German Main Height Network 2016; obsolete name: Altitude status 170).基于影像的数字表面模型（image-based Digital Surface Models，bDOM） — 派生型综合数字表面模型，格网宽度为1米 — 覆盖自由汉萨汉堡市辖区（不含汉堡瓦登海区域） 基于影像的数字表面模型（bDOM）可表征地球表面及地表附着物（如建筑结构），以规则分布且带地理参考的高程点形式呈现，数据采集自摄影测量航空飞行的航拍影像（本次为2020年春季飞行任务）。该类基于影像的表面模型由定向数字航拍影像生成（即密集影像匹配（Dense-Image-Matching））。 该基于影像的数字表面模型是TrueDOP级数字正射影像图生产流程中的中间产物。 本数据集采用以下坐标系统： 平面参考系：ETRS89_UTM32（参考系统为ETRS89，即通用横轴墨卡托投影（UTM）；EPSG代码为25832，旧称为Status 310） 高程基准：DE_DHHN2016_NH（即2016年德国国家高程基准正常高；旧称为Altitude status 170）