Name: SAV Density (multiple years)

Display Field: BEDID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The 2023 distribution of submerged aquatic vegetation (SAV) in Chesapeake Bay and its tributaries was mapped from aerial multispectral digital imagery and satellite imagery. The aerial imagery was acquired between May and October 2023, with a resolution of 24 cm, encompassing 194 flight lines.Due to challenges in acquiring access to the airspace surrounding Washington, DC, imagery for the upper Potomac River was not acquired until September 16th and October 24th, 2023. Unfortunately, SAV in this area began dying off starting in late August and so our imagery did not capture peak biomass of SAV. Neither WorldView or Pleiades satellite imagery was available for the areas in question. NAIP imagery was flown for both Virginia and Maryland in 2023, but it was not captured until October 11th, and so provided no additional information. Satellite imagery from Planet Labs was available, but does not provide high enough resolution for mapping without being used in conjunction with other imagery.

Copyright Text: SAV Monitoring Program, Virginia Institute of Marine Science

Default Visibility: false

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -8623265.1798
YMin: 4423291.785499997
XMax: -8378132.1099
YMax: 4707668.700400002
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: DensityDef
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
UniqueValueInfos:
• Value: 0 - 10% cover (very sparse)
  Label: 0 - 10% cover (very sparse)
  Description: N/A
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  Style: esriSFSSolid
  Color: [217, 240, 211, 255]
  Outline:
  Style: esriSLSNull
  Color: [110, 110, 110, 255]
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• Value: 10 - 40% cover (sparse)
  Label: 10 - 40% cover (sparse)
  Description: N/A
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  Outline:
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  Color: [110, 110, 110, 255]
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• Value: 40 - 70% cover (moderate)
  Label: 40 - 70% cover (moderate)
  Description: N/A
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  Color: [90, 174, 97, 255]
  Outline:
  Style: esriSLSNull
  Color: [110, 110, 110, 255]
  Width: 0
• Value: 70 - 100% cover (dense)
  Label: 70 - 100% cover (dense)
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [27, 120, 55, 255]
  Outline:
  Style: esriSLSNull
  Color: [110, 110, 110, 255]
  Width: 0
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

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Supports OrderBy: true
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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: false
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 )
• BEDID ( type: esriFieldTypeString, alias: BEDID, length: 2 )
• DENSITY ( type: esriFieldTypeInteger, alias: DENSITY )
• BEDLABEL ( type: esriFieldTypeString, alias: BEDLABEL, length: 6 )
• ZONE_ ( type: esriFieldTypeInteger, alias: ZONE_ )
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• Surveyed ( type: esriFieldTypeString, alias: Surveyed, length: 3 )
• sav_hab ( type: esriFieldTypeString, alias: sav_hab, length: 50 )
• YEAR ( type: esriFieldTypeSmallInteger, alias: YEAR )
• DensityDef ( type: esriFieldTypeString, alias: DensityDef, length: 50 )
• Acres ( type: esriFieldTypeDouble, alias: Acres )
• Shape_Length ( type: esriFieldTypeDouble, alias: Shape_Length )
• Shape_Area ( type: esriFieldTypeDouble, alias: Shape_Area )

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

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