National Hydrography Dataset Plus Version 2.1

Retirement Notice: This item is in mature support as of April 2026 and will be retired in December 2027. A new version of this item is available for your use. Esri recommends updating your maps and apps to use the new version. The National Hydrography Dataset Plus (NHDplus) maps the lakes, ponds, streams, rivers and other surface waters of the United States. Created by the US EPA Office of Water and the US Geological Survey, the NHDPlus provides mean annual and monthly flow estimates for rivers and streams. Additional attributes provide connections between features facilitating complicated analyses. For more information on the NHDPlus dataset see the NHDPlus v2 User Guide. Dataset Summary Phenomenon Mapped: Surface waters and related features of the United States and associated territories not including Alaska. Geographic Extent: The United States not including Alaska, Puerto Rico, Guam, US Virgin Islands, Marshall Islands, Northern Marianas Islands, Palau, Federated States of Micronesia, and American Samoa Projection: Web Mercator Auxiliary Sphere Visible Scale: Visible at all scales but layer draws best at scales larger than 1:1,000,000 Source: EPA and USGS Update Frequency: There is new new data since this 2019 version, so no updates planned in the future Publication Date: March 13, 2019 Prior to publication, the NHDPlus network and non-network flowline feature classes were combined into a single flowline layer. Similarly, the NHDPlus Area and Waterbody feature classes were merged under a single schema. Attribute fields were added to the flowline and waterbody layers to simplify symbology and enhance the layer's pop-ups. Fields added include Pop-up Title, Pop-up Subtitle, On or Off Network (flowlines only), Esri Symbology (waterbodies only), and Feature Code Description. All other attributes are from the original NHDPlus dataset. No data values -9999 and -9998 were converted to Null values for many of the flowline fields. What can you do with this layer? Feature layers work throughout the ArcGIS system. Generally your work flow with feature layers will begin in ArcGIS Online or ArcGIS Pro. Below are just a few of the things you can do with a feature service in Online and Pro. ArcGIS Online Add this layer to a map in the map viewer. The layer is limited to scales of approximately 1:1,000,000 or larger but a vector tile layer created from the same data can be used at smaller scales to produce a webmap that displays across the full range of scales. The layer or a map containing it can be used in an application. Change the layer’s transparency and set its visibility range Open the layer’s attribute table and make selections. Selections made in the map or table are reflected in the other. Center on selection allows you to zoom to features selected in the map or table and show selected records allows you to view the selected records in the table. Apply filters. For example you can set a filter to show larger streams and rivers using the mean annual flow attribute or the stream order attribute. Change the layer’s style and symbology Add labels and set their properties Customize the pop-up Use as an input to the ArcGIS Online analysis tools. This layer works well as a reference layer with the trace downstream and watershed tools. The buffer tool can be used to draw protective boundaries around streams and the extract data tool can be used to create copies of portions of the data. ArcGIS Pro Add this layer to a 2d or 3d map. Use as an input to geoprocessing. For example, copy features allows you to select then export portions of the data to a new feature class. Change the symbology and the attribute field used to symbolize the data Open table and make interactive selections with the map Modify the pop-ups Apply Definition Queries to create sub-sets of the layer Questions? Please leave a comment below if you have a question about this layer, and we will get back to you as soon as possible.停用通知：本数据集自2026年4月起进入成熟支持阶段，并将于2027年12月正式停用。目前已有新版本可供使用，Esri建议您更新现有地图与应用程序以适配新版本。 国家水文数据集增强版（National Hydrography Dataset Plus, NHDplus）精准绘制了美国境内的湖泊、池塘、溪流、河流及其他地表水体。该数据集由美国环境保护署（United States Environmental Protection Agency, EPA）水资源办公室与美国地质调查局（United States Geological Survey, USGS）联合开发，可提供河流与溪流的年均及月均流量估算值，附加属性字段支持要素间关联分析，可支撑复杂空间计算。如需了解NHDplus数据集的更多详情，请参阅《NHDplus v2 用户指南》。 数据集概述 制图覆盖范围：美国及相关领地的地表水体与关联要素（不含阿拉斯加州） 地理覆盖范围：不含阿拉斯加州的美国本土，以及波多黎各、关岛、美属维尔京群岛、马绍尔群岛、北马里亚纳群岛、帕劳、密克罗尼西亚联邦和美属萨摩亚 投影坐标系：Web墨卡托辅助球体坐标系（Web Mercator Auxiliary Sphere） 可视比例尺：全比例尺下均可显示，但图层最佳显示比例尺大于1:1,000,000 数据来源：美国环境保护署（EPA）与美国地质调查局（USGS） 更新频率：自2019版发布以来无新增数据，未来暂无更新计划 发布日期：2019年3月13日 发布前，我们已将NHDplus的网络流线与非网络流线要素类合并为单一流线图层。同理，NHDplus的面积要素与水体要素类也已整合至统一架构下。为简化符号系统设置并优化图层弹窗展示效果，我们为流线与水体图层新增了属性字段，新增字段包括：弹窗标题、弹窗副标题、网络归属（仅适用于流线要素）、Esri符号系统（仅适用于水体要素）以及要素代码描述。其余属性字段均源自原始NHDplus数据集。针对多数流线字段，我们将无数据值-9999与-9998转换为空值（Null）。 可通过本图层开展哪些工作？ 要素图层可在全ArcGIS生态系统中兼容使用，您的工作流程通常可从ArcGIS Online（ArcGIS Online）或ArcGIS Pro（ArcGIS Pro）启动。以下列举部分可在ArcGIS Online与ArcGIS Pro中通过要素服务实现的操作。 ### 在ArcGIS Online中 1. 将本图层添加至地图查看器中的地图内。本图层仅支持约1:1,000,000及更大比例尺的显示，但基于相同数据创建的矢量瓦片图层可适配更小比例尺，用于制作全比例尺范围均可显示的网页地图。 2. 可将本图层或包含本图层的地图集成至应用程序中。 3. 调整图层透明度并设置可见比例尺范围。 4. 打开图层属性表并执行要素选择操作，地图与属性表中的选择结果会双向同步。通过“居中至选择项”功能可缩放至地图或属性表中选中的要素，“显示选中记录”功能则可在属性表中查看已选中的记录。 5. 应用筛选条件：例如可通过年均流量属性或河流等级属性设置筛选规则，仅显示大型溪流与河流。 6. 修改图层样式与符号系统。 7. 添加标签并设置其显示属性。 8. 自定义弹窗展示内容。 9. 将本图层作为ArcGIS Online分析工具的输入数据源。本图层可作为参考图层，适配下游追踪与流域分析工具；可通过缓冲区工具为溪流绘制保护范围，也可通过提取数据工具导出数据集的指定子集。 ### 在ArcGIS Pro中 1. 将本图层添加至二维或三维地图中。 2. 将本图层作为地理处理工具的输入数据源：例如通过“复制要素”工具选中并导出指定数据子集至新的要素类中。 3. 修改符号系统及用于符号化展示的属性字段。 4. 打开属性表并结合地图进行交互式要素选择。 5. 修改弹窗展示内容。 6. 应用定义查询以生成图层的指定子集。 如有疑问，请在下方留言，我们将尽快为您解答。