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Flood Zones (FEMA NFHL)

Unknown authfloodzone

FEMA National Flood Hazard Layer data for flood zone analysis. Special Flood Hazard Areas (SFHA) require floodplain development permits. CRITICAL USAGE RULES: 1. No authentication required - free government API 2. sfhaIndicator=true means site is in Special Flood Hazard Area 3. Flood zones: A, AE, AO, AH (high risk), X (moderate/minimal risk) 4. Coordinates are latitude/longitude in WGS84

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Provenance

PublisherFlood Zones (FEMA NFHL)

Freshness & coverage

FreshnessFreshness not declared
GeographicNot declared
TemporalNot declared
AuthenticationNo credentials required

Methods (3)

  • queryAtPoint

    read

    Query flood zones at a specific coordinate

    Required paramslatitudelongitude

  • queryInBbox

    read

    Query flood zones within a bounding box

    Required paramsxminyminxmaxymax

  • getServiceInfo

    read

    Get NFHL service metadata and available layers