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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
    Input schema
    {
  "type": "object",
  "properties": {
    "latitude": {
      "type": "number",
      "examples": [
        29.76
      ]
    },
    "longitude": {
      "type": "number",
      "examples": [
        -95.37
      ]
    },
    "bufferMeters": {
      "type": "number",
      "examples": [
        100
      ]
    },
    "includeGeometry": {
      "type": "boolean"
    }
  },
  "additionalProperties": false,
  "required": [
    "latitude",
    "longitude"
  ]
}

  • queryInBbox

    read

    Query flood zones within a bounding box

    Required paramsxminyminxmaxymax
    Input schema
    {
  "type": "object",
  "properties": {
    "xmin": {
      "type": "number",
      "examples": [
        -95.5
      ]
    },
    "ymin": {
      "type": "number",
      "examples": [
        29.5
      ]
    },
    "xmax": {
      "type": "number",
      "examples": [
        -95
      ]
    },
    "ymax": {
      "type": "number",
      "examples": [
        30
      ]
    },
    "maxResults": {
      "type": "number"
    },
    "includeGeometry": {
      "type": "boolean"
    }
  },
  "additionalProperties": false,
  "required": [
    "xmin",
    "ymin",
    "xmax",
    "ymax"
  ]
}

  • getServiceInfo

    read

    Get NFHL service metadata and available layers

    Input schema
    {
  "type": "object",
  "properties": {},
  "additionalProperties": false
}