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The rFHL/NFHL:

The rFHL/NFHL:. W hat’s I n I t F or M e ( WIIFM ). What is the NFHL?. N ational F lood H azard L ayer FEMA’s most up-to-date flood hazard information Database Repository Digital Flood Insurance Rate Map (FIRM) Feature Classes and Tables submitted as part of the FIRM database

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The rFHL/NFHL:

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  1. The rFHL/NFHL: What’s In It For Me (WIIFM)

  2. What is the NFHL? • National Flood Hazard Layer • FEMA’s most up-to-date flood hazard information • Database Repository • Digital Flood Insurance Rate Map (FIRM) Feature Classes and Tables submitted as part of the FIRM database • Letters of Map Revision (LOMR) • Physical Map Revisions (PMR) • Each FIRM Database coded with DFIRM_ID

  3. What is the rFHL? • Regional Flood Hazard Layer • Production & Technical Service (PTS) Contractor Responsibility • BakerAECOM • Risk Assessment, Mapping and Planning Partners (RAMPP) • Strategic Alliance for Risk Reduction (STARR) • Database Repository • FIRM Databases • LOMRs • PMRs • Each Database Coded with DFIRM_ID • rFHL provided to CDS and published as NFHL

  4. FEMA’s Digital Vision • An initiative to reduce reliance on paper maps in favor of digital mapping data.  • FEMA Policy on Use of Digital Flood Hazard Data • Enable significant advantages in capability, precision, and cost for users able to use digital geospatial products; • Reduce costs associated with paper map production, handling and storage; • Encourage the use of quality local data to make administration of the NFIP more efficient and effective • Enable stakeholders who have adopted digital technology to use it for NFIP purposes. • Distribution of FIRM and LOMR data via the NFHL lowers distribution costs and reduces the need for static map images through FEMA’s MSC.  

  5. How is the NFHL different than the FIRM Database • FIRM database on the MSC is Static • NFHL is Updated Regularly with Letters of Map Revision & PMRs • Removal of overlapping multi-county community data in special cases

  6. PTS Responsibility • BakerAECOM – Regions IV, VIII, & IX • RAMPP – Regions II, III, & VI • STARR – Regions I, V, VII, & X • Obtain FIRM/PMR database – Process data to NFHL schema • Incorporate LOMRs • Perform Quality Review prior to submission • Topology, Duplicates, Attributes

  7. Example LOMR Incorporation

  8. NFHL Data Usage

  9. NFHL Data Usage • Project Initiation • Use effective data from NFHL to initiate PMR, LOMR, or Watershed Study • Use effective data to verify mapping of multi-county communities • Preliminary & Post-Preliminary • Edge Match across FIRM boundaries • Approximate LOMA Locations • Incorporate LOMRs (digital FIRMs) • Status of surrounding communities • Effective • Digital Availability for Analysis • Regulation/Mitigation • Risk MAP • Changes since last FIRM (digital FIRM)

  10. Submittal & Publication Metrics • FIRM / PMR – Published on Effective Date • LOMRs • Effective on Issue (EOI) – within 15 days of effective date • Effective After Issue (EAI) – 5 days prior to effective date • FIRM Databases in NFHL - 1646

  11. Benefits • One Central Repository • Updated Flood Hazard Information within days of revision effective date • Able to understand Risk “seamlessly” – Risks Don’t STOP at Community Boundaries. • Mapping Partners Can Utilize as Base for updating Countywide Studies, Physical Map Revisions or Edge-matching • Communities and Administrators can access data for determinations/regulation/mitigation • Use with other data for additional analysis and planning • Better Understanding of Risk

  12. Understanding Risk

  13. So… How do we get it?

  14. So… How do we get it? • NFHL GIS datasets (Statewide DVD) - integrate data with local GIS layers to perform queries and analysis • www.msc.fema.gov • Map Viewer – view NFHL data on Mapping Information Platform (MIP) web page • https://hazards.fema.gov/wps/portal/mapviewer • Web Map Service (WMS) – view NFHL data in mapping application such as ArcGIS Desktop and compare to other GIS layers • http://hazards.fema.gov/wmsconnector/wmsconnector/Servlet/NFHL?VERSION=1.1.1&EST=GetFeatureInfo& • Google Earth – view NFHL on Google Earth images • https://hazards.fema.gov/femaportal/wps/portal/NFHLWMSkmzdownload

  15. Questions?

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