Stream Centerline 2024

This dataset is Elevation-Derived Hydrography (EDH) for Hamilton County located in Indiana. The EDH contains line features representing streams and rivers and polygons representing waterbodies. The EDH was derived from a 2-foot lidar-derived Digital Elevation Model (DEM), acquired in 2024. This dataset meets the requirements of the USGS Elevation-Derived Hydrography Data Acquisition Specifications (2023 rev. A2) and READ Rules. The line features contain Elevation Class (EClass) codes useful for hydro-enforcement, including culvert identification. Feature Class (FClass) and Feature Codes (FCodes) are hydrography codes compatible with the National Hydrography Dataset (NHD), now retired.本数据集为印第安纳州汉密尔顿县的高程派生水系（Elevation-Derived Hydrography，EDH）数据集。该EDH数据集包含表征溪流与河流的线状要素，以及代表水体的面状要素。本数据集基于2024年获取的2英尺分辨率激光雷达（lidar）衍生数字高程模型（Digital Elevation Model，DEM）生成，符合美国地质调查局（USGS）《高程派生水系数据采集规范（2023年修订版A2）》及READ规则的要求。其中的线状要素包含高程等级（Elevation Class，EClass）编码，可用于水文合规校验，涵盖涵洞识别。要素类（Feature Class，FClass）与要素编码（Feature Codes，FCodes）为与现已废止的国家水系数据集（National Hydrography Dataset，NHD）兼容的水系编码。