Utah Letters of Map Revision

Overview This feature service provides Utah Letters of Map Revision (LOMRs) from FEMA’s National Flood Hazard Layer. It supports access to map revision records used to track official changes to flood hazard mapping and related floodplain information in Utah. Feature Layers Letters of Map Revision: Polygon features representing LOMR records with associated case and revision identifiers, effective dates, status, source citation, and related reference information. Geographic Coverage The service covers Utah and is part of FEMA’s national flood hazard mapping program. Use Cases Reviewing official flood map revision history Supporting floodplain management and regulatory reference workflows Integrating LOMR records into local and state GIS applications Source The Utah subset of Letters of Map Revision (LOMRs, layer 1) from FEMA's National Flood Hazard Layer (NFHL) GIS web service. For more information about these layers, please visit FEMA's website. This layer is updated from the FEMA web service at 3:00 AM every Monday morning. Accessibility This layer may include attachments (photos/receipts) submitted by external users; these may lack alternative text. For accessibility assistance, contact Julia Surkis (DEM GIS Program Manager) at [e-mail].概述 本要素服务提供来自美国联邦紧急事务管理局（Federal Emergency Management Agency, FEMA）国家洪水灾害图层的犹他州地图修订信函（Letters of Map Revision, LOMRs），支持访问用于追踪犹他州洪水灾害制图及相关漫滩信息官方变更的地图修订记录。 要素图层 地图修订信函：代表地图修订信函记录的面要素，附带相关案例与修订标识符、生效日期、状态、来源引用及相关参考信息。 地理覆盖范围 本服务覆盖犹他州，隶属于美国联邦紧急事务管理局的国家洪水灾害制图项目。 应用场景 包括查阅官方洪水地图修订历史、支撑漫滩管理与监管参考工作流，以及将地图修订信函记录集成至地方及州级地理信息系统（Geographic Information System, GIS）应用中。 数据来源 本图层源自美国联邦紧急事务管理局国家洪水灾害图层（National Flood Hazard Layer, NFHL）GIS网络服务中的犹他州地图修订信函（LOMRs，图层1）子集。如需了解这些图层的更多信息，请访问美国联邦紧急事务管理局官网。本图层每周一凌晨3:00从美国联邦紧急事务管理局网络服务同步更新。 可访问性说明 本图层可能包含外部用户提交的附件（照片/收据），此类附件可能未配备替代文本。如需获得可访问性协助，请联系朱莉娅·苏基斯（DEM GIS项目主管），邮箱地址：[e-mail]。