Name: Effective FEMA Floodplain

Display Field: DFIRM_ID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This Digital Flood Insurance Rate Map (D-FIRM) database presents the flood risk information depicted on Maryland's Flood Insurance Rate Maps (FIRMs) in a digital format suitable for use in electronic mapping applications. The primary risk classifications used are the 1-percent-annual-chance flood event (100-year storm), the 0.2-percent-annual- chance flood event (500-year storm), and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), 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 the Federal Emergency Management Agency (FEMA). This D-FIRM database contains up to date information as of the publish date, however FEMA continuously makes updates including adoption of new and revised maps. When FEMA makes updates they will be reflected immediately in FEMA's Map Service Center; MDE will soon after reflect those updates on mdfloodmaps.net. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.Last Updated: 5/14/2025

Copyright Text: MD iMAP, MDE, MES, FEMA

Default Visibility: true

MaxRecordCount: 36000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0.0

Max Scale: 0.0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: false

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -8848409.3822
YMin: 4566866.133100003
XMax: -8353651.509400001
YMax: 4825772.370399997
Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: FLD_ZONE
Field 2: ZONE_SUBTY
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
UniqueValueInfos:
• Value: A,<Null>
  Label: A
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 230, 255, 255]
  Outline:
  Style: esriSLSSolid
  Color: [0, 92, 230, 255]
  Width: 1
• Value: AE,<Null>
  Label: AE
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 230, 255, 255]
  Outline:
  Style: esriSLSSolid
  Color: [0, 92, 230, 255]
  Width: 1
• Value: AE,FLOODWAY
  Label: AE, FLOODWAY
  Description: N/A
  Symbol:
  Style: esriSFSBackwardDiagonal
  Color: [0, 230, 255, 255]
  Outline:
  N/A
• Value: AH,<Null>
  Label: AH
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 230, 255, 255]
  Outline:
  Style: esriSLSSolid
  Color: [0, 92, 230, 255]
  Width: 1
• Value: AO,<Null>
  Label: AO
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 230, 255, 255]
  Outline:
  Style: esriSLSSolid
  Color: [0, 92, 230, 255]
  Width: 1
• Value: VE,<Null>
  Label: VE
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 230, 255, 255]
  Outline:
  Style: esriSLSSolid
  Color: [0, 92, 230, 255]
  Width: 1
• Value: VE,RIVERINE FLOODWAY SHOWN IN COASTAL ZONE
  Label: VE, RIVERINE FLOODWAY SHOWN IN COASTAL ZONE
  Description: N/A
  Symbol:
  Style: esriSFSBackwardDiagonal
  Color: [0, 230, 255, 255]
  Outline:
  N/A
• Value: X,0.2 PCT ANNUAL CHANCE FLOOD HAZARD
  Label: X, 0.2 PCT ANNUAL CHANCE FLOOD HAZARD
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [255, 128, 0, 255]
  Outline:
  Style: esriSLSSolid
  Color: [0, 0, 0, 0]
  Width: 1
• Value: X,1 PCT FUTURE CONDITIONS
  Label: X, 1 PCT FUTURE CONDITIONS
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [130, 130, 130, 255]
  Outline:
  N/A
• Value: X,AREA WITH REDUCED FLOOD RISK DUE TO LEVEE
  Label: X, AREA WITH REDUCED FLOOD RISK DUE TO LEVEE
  Description: N/A
  Symbol:
  Style: esriSFSBackwardDiagonal
  Color: [255, 128, 0, 255]
  Outline:
  N/A
Transparency: 60
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: false
Supports Returning Geometry Centroid: false
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: true
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: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• SHAPE ( type: esriFieldTypeGeometry, alias: SHAPE )
• DFIRM_ID ( type: esriFieldTypeString, alias: DFIRM ID, length: 6 )
• VERSION_ID ( type: esriFieldTypeString, alias: Version ID, length: 11 )
• FLD_AR_ID ( type: esriFieldTypeString, alias: Flood Area ID, length: 32 )
• STUDY_TYP ( type: esriFieldTypeString, alias: Study Type, length: 38 )
• FLD_ZONE ( type: esriFieldTypeString, alias: Flood Zone, length: 17 )
• ZONE_SUBTY ( type: esriFieldTypeString, alias: Zone Subtype, length: 76 )
• SFHA_TF ( type: esriFieldTypeString, alias: Special Flood Hazard Area, length: 1 )
• STATIC_BFE ( type: esriFieldTypeDouble, alias: Static Base Flood Elevation )
• V_DATUM ( type: esriFieldTypeString, alias: Vertical Datum, length: 17 )
• LEN_UNIT ( type: esriFieldTypeString, alias: Length Unit, length: 16 )
• BFE_REVERT ( type: esriFieldTypeDouble, alias: BFE Revert )
• DUAL_ZONE ( type: esriFieldTypeString, alias: Dual Zone, length: 1 )
• SOURCE_CIT ( type: esriFieldTypeString, alias: Source Citation, length: 21 )
• GFID ( type: esriFieldTypeString, alias: GFID, length: 36 )
• SHAPE.STLength() ( type: esriFieldTypeDouble, alias: SHAPE_Length )
• SHAPE.STArea() ( type: esriFieldTypeDouble, alias: SHAPE_Area )
• EFFECTIVE_DATE ( type: esriFieldTypeString, alias: Effective Date, length: 50 )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata