Layers:

Layer: FEMA National Flood Hazard Layer (0)


Name: FEMA National Flood Hazard Layer

Display Field: DFIRM_ID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description:

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. This file is georeferenced to the Earth's surface using the Geographic Coordinate System (GCS) and North American Dataum of 1983 (NSRS-2007).

The data in this layer, named FEMA_NFHL_POLY, include data published by FEMA as of July 14, 2017(Latest Study Effective Date = 11/04/2016; Latest LOMR Effective Date = 07/14/2017).



Copyright Text: Federal Emergency Management Agency

Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

XMin: -7869235.45589826
YMin: 5087148.9818502
XMax: -7782990.04554841
YMax: 5174306.95383432
Spatial Reference: 102100 (3857)


Drawing Info:

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Has Attachments: false

Has Geometry Properties: true

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Object ID Field: OBJECTID

Unique ID Field:

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Global ID Field:

Type ID Field: LABEL

Fields:
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• DFIRM_ID (type: esriFieldTypeString, alias: DFIRM_ID, SQL Type: sqlTypeOther, length: 6, nullable: true, editable: true)
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• LABEL (type: esriFieldTypeString, alias: LABEL, SQL Type: sqlTypeOther, length: 80, nullable: true, editable: true)
• FloodZone (type: esriFieldTypeInteger, alias: FloodZone, SQL Type: sqlTypeOther, nullable: true, editable: true)
• Shape__Area (type: esriFieldTypeDouble, alias: Shape__Area, SQL Type: sqlTypeDouble, nullable: true, editable: false)
• Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)

Types:

ID: A: 1% Annual Chance of Flooding, no BFE
Name: A: 1% Annual Chance of Flooding, no BFE
Domains:

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ID: AE: 1% Annual Chance of Flooding, with BFE
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ID: AO: 1% Annual Chance of 1-3ft Sheet Flow Flooding, with Depth
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ID: VE: High Risk Coastal Area
Name: VE: High Risk Coastal Area
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ID: X: 0.2% Annual Chance of Flooding
Name: X: 0.2% Annual Chance of Flooding
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Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 12/22/2022 11:51:11 AM

Schema Last Edit Date: 12/22/2022 11:51:11 AM

Data Last Edit Date: 12/22/2022 11:51:11 AM