3DHP Waterbody Features in Kentucky

The 3D Hydrography Program (3DHP) data is an integrated, National, 3D-enabled hydrologic dataset derived from the USGS 3D Elevation Program (3DEP) data. For areas where Elevation-derived Hydrography (EDH) has not yet been collected, 3DHP data is supplemented by hydrologic vector data from the National Hydrography Dataset (NHD). As further EDH data is collected, it will replace the NHD data in those areas. 3DHP data ingested from EDH sources includes ‘value added’ catchments and flowline network derivative attributes. All the data is open and non-proprietary. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. This dataset is not intended to be used for site-specific regulatory determinations. 3DHP datasets include a three-dimensional (3D) hydrography network generated from, and integrated with, elevation data from the 3DEP to better represent stream gradients and channel conditions, along with waterbodies, hydrologic units, hydrologically enhanced elevation and other surfaces, and more consistent and accurate attributes. This product is new in federal fiscal year 2025 (FY25), and consists only of vector data in a series of feature classes. The product represents the 3DHP dataset and the schema in which it is contained as of September 30, 2024 Future Annual Staged Product releases will reflect the schema at the time the product is generated and include more EDH-sourced data holdings.三维水文项目（3D Hydrography Program，3DHP）数据集是一套集成化、国家级、具备三维能力的水文数据集，其数据源自美国地质调查局（United States Geological Survey，USGS）的三维高程项目（3D Elevation Program，3DEP）数据。对于尚未采集高程衍生水文（Elevation-derived Hydrography，EDH）数据的区域，3DHP数据集将补充来自国家水文数据集（National Hydrography Dataset，NHD）的水文矢量数据。随着后续EDH数据的采集完成，该区域原有的NHD数据将被EDH数据取代。从EDH数据源获取的3DHP数据集包含“增值”汇水区与流线网络衍生属性。所有数据集均为开源且非专有。但用户需注意，自本数据集采集以来，地表环境可能已发生时间维度上的变化，部分数据或已无法反映当前实际地表状况。若未充分知悉其局限性，用户不得将本数据集用于关键应用场景。本数据集不可用于特定场地的监管判定工作。3DHP数据集包含由3DEP高程数据生成并与之集成的三维水文网络，可更精准地展现溪流坡度与河道状况，同时涵盖水体、水文单元、水文增强型高程及其他地表要素，以及更统一且精准的属性信息。本产品为2025财年（Federal Fiscal Year 2025，FY25）新增产物，仅包含一系列要素类的矢量数据。本产品所呈现的3DHP数据集及其所属数据架构，截至2024年9月30日。未来的年度分阶段产品发布将采用产品生成时的最新数据架构，并纳入更多EDH来源的数据资源。