Name: Virginia SAV Density 2024

Display Field: BEDID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The 2024 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 2024, with a resolution of 24 cm, encompassing 189 flight lines. Due to a number of challenges, additional imagery was acquired from Maxar, SpaceWill, and Planet Labs in order to provide a more complete dataset for Chesapeake Bay. These imagery sources and their locations are detailed below:Aerial imagery was not acquired for portions of the Honga and Nanticoke Rivers and Fishing Bay. WorldView 2 satellite imagery acquired from Maxar through the NGA NextView program and PlanetScope satellite imagery from Planet Labs were used to map these areas.Due to late imagery acquisition, SuperView Neo 1 imagery from SpaceWill and PlanetScope satellite imagery from Planet Labs were used to supplement the aerial imagery for the upper Potomac River, including Nanjemoy Creek. PlanetScope imagery was also used to supplement the aerial imagery for the Pamunkey and upper Rappahannock Rivers and WorldView 2 satellite imagery acquired from Maxar through the NGA NextView program was used to supplement the aerial imagery for the Big Annemessex, Manokin, and Little Choptank Rivers, and Pocomoke and Tangier Sounds, as well as the Chesapeake Bay Eastern Shore from Hungars Creek to Onancock Creek.Due to turbid conditions, WorldView 2 satellite imagery acquired from Maxar through the NGA NextView program was used to supplement the aerial imagery for the Corrotoman, Piankatank, and lower Rappahannock Rivers, and Mobjack Bay.WorldView 2 satellite imagery acquired from Maxar through the NGA NextView program was used to supplement the aerial imagery for the Back, Bush, Gunpowder, Middle, Patapsco, and Sassafras Rivers, and the Susquehanna Flats

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: -8614193.4309
YMin: 4424456.136600003
XMax: -8379079.6367999995
YMax: 4677886.283199998
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
  Symbol:
  Style: esriSFSSolid
  Color: [237, 248, 233, 255]
  Outline:
  Style: esriSLSNull
  Color: [110, 110, 110, 255]
  Width: 0
• Value: 10 - 40% cover (sparse)
  Label: 10 - 40% cover (sparse)
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [186, 228, 179, 255]
  Outline:
  Style: esriSLSNull
  Color: [110, 110, 110, 255]
  Width: 0
• Value: 40 - 70% cover (moderate)
  Label: 40 - 70% cover (moderate)
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [116, 196, 118, 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: [35, 139, 69, 255]
  Outline:
  Style: esriSLSNull
  Color: [110, 110, 110, 255]
  Width: 0
Transparency: 0
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: 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 )
• QUADID ( type: esriFieldTypeInteger, alias: QUADID )
• BEDID ( type: esriFieldTypeString, alias: BEDID, length: 2 )
• DENSITY ( type: esriFieldTypeInteger, alias: DENSITY )
• BEDLABEL ( type: esriFieldTypeString, alias: BEDLABEL, length: 6 )
• ZONE_ ( type: esriFieldTypeInteger, alias: ZONE_ )
• CBPSEG ( type: esriFieldTypeString, alias: CBPSEG, length: 6 )
• ST ( type: esriFieldTypeString, alias: ST, length: 2 )
• SHAPE_STAr ( type: esriFieldTypeDouble, alias: SHAPE_STAr )
• SHAPE_STLe ( type: esriFieldTypeDouble, alias: SHAPE_STLe )
• Surveyed ( type: esriFieldTypeString, alias: Surveyed, length: 3 )
• YEAR ( type: esriFieldTypeSmallInteger, alias: YEAR )
• DensityDef ( type: esriFieldTypeString, alias: DensityDef, length: 50 )
• Shape_Length ( type: esriFieldTypeDouble, alias: Shape_Length )
• Shape_Area ( type: esriFieldTypeDouble, alias: Shape_Area )
• Acres ( type: esriFieldTypeDouble, alias: Acres )

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

  Iteminfo   Thumbnail   Metadata