USA Structures

USA Structures This feature layer, utilizing Federal Emergency Management Agency (FEMA) data, displays footprints for all structures (buildings) greater than 450 square feet in the United States and its territories. According to FEMA, “FEMA’s Response Geospatial Office, Oak Ridge National Laboratory, and the U.S. Geological Survey collaborated to build and maintain the nation’s first comprehensive inventory of all structures larger than 450 square feet for use in Flood Insurance Mitigation, Emergency Preparedness and Response.” Note: these states and territories were updated in this cycle: Alabama, Alaska, Connecticut, Delaware, District of Columbia, Florida, Geogia, Hawaii, Iowa, Kansas, Kentucky, Louisiana, Maine, Michigan, Minnesota, Mississippi, Montana, Nebraska, New Hampshire, New Mexico, New York, North Carolina, North Dakota, Oregon, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Washington, West Virginia, Wisconsin, Wyoming, Puerto Rico, Virginia, Virgin Islands, Guam, American Samoa, and Northern Mariana Islands. Assembly Building in Dallas County, Texas Data currency: June 6, 2025 Data source: FEMA's USA Structures State GDB Download Site Data modification: added State FIPS, PROP_CNTY, and Global ID fields. The field type was changed from string to integer for POP_MEDIAN, POP_CI95_lower, POP_CI95_UPPER. For more information: USA Structures Support documentation: Metadata Hazus Inventory Technical Manual For feedback please contact: [e-mail] Federal Emergency Management Agency Per FEMA, “We leverage a tremendous capacity to coordinate within the federal government to make sure America is equipped to prepare for and respond to disasters.”USA Structures 本要素图层依托美国联邦紧急事务管理局（Federal Emergency Management Agency, FEMA）数据，展示美国及其所有领土范围内所有面积大于450平方英尺的建（构）筑物占地轮廓。据FEMA官方表述：“FEMA应急地理空间办公室、橡树岭国家实验室（Oak Ridge National Laboratory）与美国地质调查局（U.S. Geological Survey）通力协作，构建并维护了全美首份覆盖所有面积超450平方英尺建（构）筑物的综合名录，可用于洪水保险减灾、应急准备与应急响应工作。”注：本次更新周期覆盖以下州及领地：阿拉巴马州、阿拉斯加州、康涅狄格州、特拉华州、哥伦比亚特区、佛罗里达州、佐治亚州、夏威夷州、艾奥瓦州、堪萨斯州、肯塔基州、路易斯安那州、缅因州、密歇根州、明尼苏达州、密西西比州、蒙大拿州、内布拉斯加州、新罕布什尔州、新墨西哥州、纽约州、北卡罗来纳州、北达科他州、俄勒冈州、罗得岛州、南卡罗来纳州、南达科他州、田纳西州、得克萨斯州、犹他州、佛蒙特州、华盛顿州、西弗吉尼亚州、威斯康星州、怀俄明州、波多黎各、弗吉尼亚州、美属维尔京群岛、关岛、美属萨摩亚及北马里亚纳群岛。示例：德克萨斯州达拉斯县装配大楼。数据时效性：2025年6月6日。数据来源：FEMA旗下USA Structures州级地理数据库（State GDB）下载站点。本次数据更新内容：新增州级联邦信息处理标准代码（State FIPS）、PROP_CNTY及全局标识符（Global ID）三个字段；将POP_MEDIAN、POP_CI95_lower、POP_CI95_UPPER字段的数据类型由字符串调整为整数型。如需了解更多详情，请参阅USA Structures支持文档：《元数据及Hazus库存技术手册（Hazus Inventory Technical Manual）》。如需反馈，请联系：[e-mail]。美国联邦紧急事务管理局。据FEMA官方表述：“我们依托强大的跨联邦政府协调能力，确保美国具备灾害应对的准备与响应能力。”