The rFHL/NFHL & WIIFM
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Transcript The rFHL/NFHL & WIIFM
The rFHL/NFHL:
What’s In It For Me (WIIFM)
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
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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
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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.
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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
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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
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Example LOMR
Incorporation
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NFHL Data Usage
Project
Initiation
Risk MAP
NFHL
Preliminary
Post
Preliminary
Effective
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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)
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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
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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
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Understanding Risk
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So… How do we get it?
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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?VERSI
ON=1.1.1&EST=GetFeatureInfo&
Google Earth – view NFHL on Google Earth images
• https://hazards.fema.gov/femaportal/wps/portal/NFHLWMSkmzdownload
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Questions?
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