DFIRM Special Flood Hazard Area Line Features

[Metadata] DFIRM Special Flood Hazard Areas Line features for the State of Hawaii as of June 2026. Downloaded from the FEMA Map Service Center 6/15/26. For more information, please refer to summary metadata: https://files.hawaii.gov/dbedt/op/gis/data/s_fld_haz_ar_line_state.pdf or contact Hawaii Statewide GIS Program, Office of Planning and Sustainable Development, State of Hawaii; PO Box 2359, Honolulu, HI 96804; [phone]; email: [e-mail]; Website: https://planning.hawaii.gov/gis. The National Flood Hazard Layer (NFHL) data incorporates all Flood Insurance Rate Map (FIRM) databases published by the Federal Emergency Management Agency (FEMA), and any Letters of Map Revision (LOMRs) that have been issued against those databases since their publication date. It is updated on a monthly basis. The FIRM Database is the digital, geospatial version of the flood hazard information shown on the published paper FIRMs. The FIRM Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The FIRM Database is derived from Flood Insurance Studies (FISs), previously published FIRMs, flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by FEMA. The NFHL is available as State or US Territory data sets. Each State or Territory data set consists of all FIRM Databases and corresponding LOMRs available on the publication date of the data set. The specification for the horizontal control of FIRM Databases is consistent with those required for mapping at a scale of 1:12,000. This file is georeferenced to the Earth's surface using the Geographic Coordinate System (GCS) and North American Datum of 1983.[元数据] 本数据集为截至2026年6月的夏威夷州数字洪水保险费率地图（Digital Flood Insurance Rate Map，简称DFIRM）专项洪水危险区线状要素，于2026年6月15日从联邦紧急事务管理局（Federal Emergency Management Agency，简称FEMA）地图服务中心下载。如需获取更多信息，请参阅汇总元数据文档：https://files.hawaii.gov/dbedt/op/gis/data/s_fld_haz_ar_line_state.pdf，或联系夏威夷州规划与可持续发展厅下属夏威夷全域地理信息系统项目办公室，联系方式如下：地址：美国夏威夷州火奴鲁鲁邮政信箱2359，邮编96804；电话：[phone]；电子邮箱：[e-mail]；官方网站：https://planning.hawaii.gov。 国家洪水灾害图层（National Flood Hazard Layer，简称NFHL）数据整合了联邦紧急事务管理局（FEMA）发布的全部洪水保险费率地图（Flood Insurance Rate Map，简称FIRM）数据库，以及自各数据库发布之日起针对其出具的所有地图修订函（Letters of Map Revision，简称LOMRs），该数据每月更新一次。 洪水保险费率地图（FIRM）数据库是已发布的纸质洪水保险费率地图的数字化地理空间版本，用于呈现用于生成洪水风险数据的洪水风险信息及配套支撑数据。其采用的核心风险分级标准包括：年度超越概率1%的洪水事件、年度超越概率0.2%的洪水事件，以及最低洪水风险区域。 该数据库源自洪水保险研究报告（Flood Insurance Studies，简称FISs）、此前发布的洪水保险费率地图（FIRM）、为支撑洪水保险研究报告与洪水保险费率地图所开展的洪水风险分析，以及现有可获取的最新测绘数据。洪水保险研究报告（FISs）与洪水保险费率地图（FIRM）均由联邦紧急事务管理局（FEMA）发布。 国家洪水灾害图层（NFHL）可按州或美国领地数据集形式提供，每个州或领地数据集包含数据集发布当日可用的全部洪水保险费率地图（FIRM）数据库及对应的地图修订函（LOMRs）。 洪水保险费率地图（FIRM）数据库的水平控制规范与1:12000比例尺测绘的相关要求保持一致。本文件采用地理坐标系（Geographic Coordinate System，简称GCS）及1983年北美大地基准面（North American Datum of 1983）完成地理配准，以匹配地球表面坐标。