National Levee Database
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National Levee Database This feature layer, utilizing National Geospatial Data Asset (NGDA) data from the U.S. Army Corps of Engineers (USACE), displays levees within the United States. Per USACE, “The National Levee Database captures all known levees in the United States. It provides users with the ability to search for specific data about levees and serves as a national resource to support awareness and preparedness around flooding. The USACE is responsible for maintaining the National Levee Database and works in partnership with the Federal Emergency Management Agency (FEMA), and in close collaboration with other federal, state, and local governments and entities responsible for levees to obtain and share accurate and complete information.” Leveed area in Morrisville, Pennsylvania Data downloaded: 9/22/2025 Data source: NLD/Public NGDAID: 161 (National Levee Database) OGC API Features Link: (National Levee Database - OGC Features) copy this link to embed it in OGC Compliant viewers For more information, please visit: National Levee Database Support documentation: NLD Data Dictionary For feedback please contact: Esri_US_Federal_Data@esri.com NGDA Data Set This data set is part of the NGDA Water - Inland Theme Community. Per the Federal Geospatial Data Committee (FGDC), Water - Inland is defined as the “interior hydrologic features and characteristics, including classification, measurements, location, and extent. Includes aquifers, watersheds, wetlands, navigation, water quality, water quantity, and groundwater information.” For other NGDA Content: Esri Federal Datasets
国家堤坝数据库（National Levee Database）：该要素图层采用美国陆军工程兵团（U.S. Army Corps of Engineers, USACE）提供的国家地理空间数据资产（National Geospatial Data Asset, NGDA）数据，展示美国境内的堤坝分布。 据美国陆军工程兵团说明："国家堤坝数据库收录了美国境内所有已知堤坝，支持用户检索堤坝的专项数据，同时作为国家级资源，为洪涝灾害的认知与应急准备工作提供支撑。美国陆军工程兵团负责维护该数据库，并与联邦紧急事务管理局（Federal Emergency Management Agency, FEMA）开展合作，同时紧密协同其他联邦、州及地方各级政府与堤坝责任主体，以获取并共享准确完整的堤坝信息。" 宾夕法尼亚州莫里斯维尔的堤坝防护区域 数据下载日期：2025年9月22日 数据来源：NLD/Public；NGDAID：161（国家堤坝数据库） OGC要素服务接口链接：（国家堤坝数据库 - OGC要素服务），可复制该链接以嵌入符合OGC标准的可视化查看器中 如需了解更多信息，请访问：国家堤坝数据库 配套文档：国家堤坝数据库数据字典（NLD Data Dictionary） 如需反馈，请联系：Esri_US_Federal_Data@esri.com 国家地理空间数据资产数据集：本数据集隶属于国家地理空间数据资产内陆水系主题社区。据联邦地理空间数据委员会（Federal Geospatial Data Committee, FGDC）定义，内陆水系范畴涵盖"内陆水文要素及其特征，包括分类、测量、位置与范围，包含含水层、流域、湿地、航运、水质、水量及地下水相关信息"。如需获取其他国家地理空间数据资产内容，请访问：Esri联邦数据集
