Flood Hazard Areas (DFIRM) - Hawaii County

[Metadata] Flood Hazard Areas for the County of Hawaii as of June 2026 - downloaded from FEMA Flood Map Service Center, 6/15/26. See summary metadata: https://files.hawaii.gov/dbedt/op/gis/data/s_fld_haz_ar_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.

【元数据】夏威夷县2026年6月洪水危险区域数据集——下载自联邦紧急事务管理局（Federal Emergency Management Agency，简称FEMA）洪水地图服务中心，获取日期2026年6月15日。详见元数据摘要：https://files.hawaii.gov/dbedt/op/gis/data/s_fld_haz_ar_state.pdf，或联系夏威夷州全域地理信息系统项目组（隶属于夏威夷州规划与可持续发展办公室），地址：美国夏威夷州火奴鲁鲁市PO箱2359，邮编96804；联系电话：[phone]；电子邮箱：[e-mail]；官方网站：https://planning.hawaii.gov/gis。
国家洪水危险图层（National Flood Hazard Layer，简称NFHL）数据集包含联邦紧急事务管理局发布的所有洪水保险费率图（Flood Insurance Rate Map，简称FIRM）数据库，以及自这些数据库发布之日起针对其出具的所有地图修订信函（Letters of Map Revision，简称LOMRs）。该数据集每月更新一次。
洪水保险费率图数据库是已发布的纸质洪水保险费率图所承载的洪水危险信息的数字化地理空间版本，用于展示用于生成洪水风险数据的风险信息及配套支撑数据。其采用的核心风险分级包括：年超越概率1%的洪水事件、年超越概率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（Flood Insurance Studies，简称FISs）、此前发布的洪水保险费率图、为支持洪水保险研究与洪水保险费率图开展的洪水危险分析，以及可获取的新型测绘数据。洪水保险研究与洪水保险费率图均由联邦紧急事务管理局发布。
国家洪水危险图层以州或美国领地数据集的形式提供，每个州或领地数据集包含该数据集发布当日可获取的所有洪水保险费率图数据库及对应的地图修订信函。洪水保险费率图数据库的平面控制规范与1:12000比例尺测绘的要求保持一致。