View In:   ArcGIS Online Map Viewer

Name: FEMA National Flood Hazard Layer 2023

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 2, 2023(Latest Study Effective Date = 06/21/2023; Latest LOMR Effective Date = 11/28/2022).

Service Item Id: 80cd6542fc8c48148c25a6813123d167

Copyright Text: Federal Emergency Management Agency

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Supports Datum Transformation: true

Extent:

XMin: -7924992.745035857
YMin: 5195046.080558267
XMax: -7894885.119133283
YMax: 5221906.210835373
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Simple Renderer:
Symbol:
Style: esriSFSSolid
Color: [55, 108, 189, 255]
Outline:
Style: esriSLSSolid
Color: [0, 0, 0, 255]
Width: 0
Label: N/A
Description: N/A
Transparency: 50
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: true
Supports Returning Geometry Centroid: true
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: true
Supports Time Relation: false
Supports Sql Format: false
Supports Query Analytic: true
Supports Query With Current User: true

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field:

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID, editable: false, nullable: false, defaultValue: null, modelName: OBJECTID )
• DFIRM_ID ( type: esriFieldTypeString, alias: Study Identifier, editable: true, nullable: true, length: 6, defaultValue: null, modelName: DFIRM_ID )
• VERSION_ID ( type: esriFieldTypeString, alias: Version Identifier, editable: true, nullable: true, length: 11, defaultValue: null, modelName: VERSION_ID )
• FLD_AR_ID ( type: esriFieldTypeString, alias: Flood Area ID, editable: true, nullable: true, length: 32, defaultValue: null, modelName: FLD_AR_ID )
• STUDY_TYP ( type: esriFieldTypeString, alias: Study Type, editable: true, nullable: true, length: 38, defaultValue: null, modelName: STUDY_TYP )
• FLD_ZONE ( type: esriFieldTypeString, alias: Flood Zone, editable: true, nullable: true, length: 17, defaultValue: null, modelName: FLD_ZONE )
• ZONE_SUBTY ( type: esriFieldTypeString, alias: Flood Zone Subtype, editable: true, nullable: true, length: 76, defaultValue: null, modelName: ZONE_SUBTY )
• SFHA_TF ( type: esriFieldTypeString, alias: Special Flood Hazard Area, editable: true, nullable: true, length: 1, defaultValue: null, modelName: SFHA_TF )
• STATIC_BFE ( type: esriFieldTypeDouble, alias: Static Base Flood Elevation, editable: true, nullable: true, defaultValue: null, modelName: STATIC_BFE )
• V_DATUM ( type: esriFieldTypeString, alias: Vertical Datum, editable: true, nullable: true, length: 17, defaultValue: null, modelName: V_DATUM )
• DEPTH ( type: esriFieldTypeDouble, alias: Depth, for Zone AO areas, editable: true, nullable: true, defaultValue: null, modelName: DEPTH )
• LEN_UNIT ( type: esriFieldTypeString, alias: Length Units, editable: true, nullable: true, length: 16, defaultValue: null, modelName: LEN_UNIT )
• VELOCITY ( type: esriFieldTypeDouble, alias: Flood Flow Velocity, editable: true, nullable: true, defaultValue: null, modelName: VELOCITY )
• VEL_UNIT ( type: esriFieldTypeString, alias: Velocity Unit, editable: true, nullable: true, length: 20, defaultValue: null, modelName: VEL_UNIT )
• AR_REVERT ( type: esriFieldTypeString, alias: Restoration Zones – Zone AR, editable: true, nullable: true, length: 17, defaultValue: null, modelName: AR_REVERT )
• AR_SUBTRV ( type: esriFieldTypeString, alias: Restoration Zones – Zone AR, editable: true, nullable: true, length: 57, defaultValue: null, modelName: AR_SUBTRV )
• BFE_REVERT ( type: esriFieldTypeDouble, alias: Restoration Zones - BFE Revert, editable: true, nullable: true, defaultValue: null, modelName: BFE_REVERT )
• DEP_REVERT ( type: esriFieldTypeDouble, alias: Restoration Zones - Depth Revert, editable: true, nullable: true, defaultValue: null, modelName: DEP_REVERT )
• DUAL_ZONE ( type: esriFieldTypeString, alias: Restoration Zones - Dual Zone, editable: true, nullable: true, length: 1, defaultValue: null, modelName: DUAL_ZONE )
• SOURCE_CIT ( type: esriFieldTypeString, alias: Source Citation, editable: true, nullable: true, length: 21, defaultValue: null, modelName: SOURCE_CIT )
• GFID ( type: esriFieldTypeString, alias: County Code from FEMA, editable: true, nullable: true, length: 36, defaultValue: null, modelName: GFID )
• LABEL ( type: esriFieldTypeString, alias: LABEL, editable: true, nullable: true, length: 100, defaultValue: null, modelName: LABEL )
• SHAPE_Leng ( type: esriFieldTypeDouble, alias: SHAPE_Leng, editable: true, nullable: true, defaultValue: null, modelName: SHAPE_Leng )
• Shape__Area ( type: esriFieldTypeDouble, alias: Shape.STArea(), editable: false, nullable: true, defaultValue: null, modelName: Shape.STArea(), required: true )
• Shape__Length ( type: esriFieldTypeDouble, alias: Shape.STLength(), editable: false, nullable: true, defaultValue: null, modelName: Shape.STLength(), required: true )

Templates:

• Name: FEMA National Flood Hazard Layer 2023
  Description:
  Prototype:
  SHAPE_Leng: null
  DFIRM_ID: null
  VERSION_ID: null
  FLD_AR_ID: null
  STUDY_TYP: null
  FLD_ZONE: null
  ZONE_SUBTY: null
  SFHA_TF: null
  STATIC_BFE: null
  V_DATUM: null
  DEPTH: null
  LEN_UNIT: null
  VELOCITY: null
  VEL_UNIT: null
  AR_REVERT: null
  AR_SUBTRV: null
  BFE_REVERT: null
  DEP_REVERT: null
  DUAL_ZONE: null
  SOURCE_CIT: null
  GFID: null
  LABEL: null
  
  Drawing Tool: esriFeatureEditToolPolygon

Capabilities: Query,Create,Update,Delete,Uploads,Editing

Sync Can Return Changes: false

Is Data Versioned: false

Supports Rollback On Failure: true

Supports ApplyEdits With Global Ids: false

Supports Query With Historic Moment: false

Supports Coordinates Quantization: true

Child Resources:   Field Groups   Contingent Values

Supported Operations:   Query   Query Analytic   Apply Edits   Add Features   Update Features   Delete Features   Calculate   Validate SQL   Generate Renderer   Return Updates   Iteminfo   Thumbnail   Metadata   Update Metadata