View In:   ArcGIS Online Map Viewer

Name: SAV 2022

Display Field: BEDID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The 2022 Chesapeake Bay SAV Coverage was mapped from 1:24,000 black and white aerial photography and digital multispectral imagery with a 25cm GSD to assess water quality in the Bay. Each area of SAV was interpreted from the rectified photography and classified into one of four density classes by the percentage of cover. The SAV beds were entered into an SDE GIS fetaure class using the quality control procedures documented below. The dataset contains all SAV areas that were identified from the areas flown. Some areas that are presumed to contain no SAV were not flown. Some small beds, particularly along narrow tributaries may not have been distinguishable on the aerial photography. The Department of Natural Resources makes no warranty, expressed or implied, as to the use or appropriateness of Spatial Data, and there are no warranties of merchantability or fitness for a particular purpose or use. The information contained in Spatial Data is from publicly available sources, but no representation is made as to the accuracy or completeness of Spatial Data. The Department of Natural Resources shall not be subject to liability for human error, error due to software conversion, defect, or failure of machines, or any material used in the connection with the machines, including tapes, disks, CD-ROMs or DVD-ROMs and energy. The Department of Natural Resources shall not be liable for any lost profits, consequential damages, or claims against the Department of Natural Resources by third parties. The liability of the Department of Natural Resources for damage regardless of the form of the action shall not exceed any distribution fees that may have been paid in obtaining Spatial Data.

Copyright Text: MD iMAP, DNR, VIMS

Default Visibility: true

MaxRecordCount: 4900

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Extent:

XMin: -8607556.5476
YMin: 4566808.841300003
XMax: -8361372.7226
YMax: 4809848.282799996
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
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Label:
Description:
Transparency: 0
Labeling Info:

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Supports Sql Expression: true
Supports Query With ResultType: true
Supports Returning Geometry Centroid: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field:

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: GIS Object ID, editable: false, nullable: false, defaultValue: null, modelName: OBJECTID )
• QUADID ( type: esriFieldTypeSmallInteger, alias: Quad ID, editable: true, nullable: true, defaultValue: null, modelName: QUADID )
• BEDID ( type: esriFieldTypeString, alias: Bed ID, editable: true, nullable: true, length: 2, defaultValue: null, modelName: BEDID )
• DENSITY ( type: esriFieldTypeSmallInteger, alias: Density, editable: true, nullable: true, defaultValue: null, modelName: DENSITY )
• BEDLABEL ( type: esriFieldTypeString, alias: Bed Label, editable: true, nullable: true, length: 3, defaultValue: null, modelName: BEDLABEL )
• ZONE_ ( type: esriFieldTypeSmallInteger, alias: Zone, editable: true, nullable: true, defaultValue: null, modelName: ZONE_ )
• CBPSEG ( type: esriFieldTypeString, alias: Chesapeake Bay Program Segment, editable: true, nullable: true, length: 6, defaultValue: null, modelName: CBPSEG )
• ST ( type: esriFieldTypeString, alias: State, editable: true, nullable: true, length: 2, defaultValue: null, modelName: ST )
• Surveyed ( type: esriFieldTypeString, alias: Surveyed, editable: true, nullable: true, length: 3, defaultValue: null, modelName: Surveyed )

Templates:

• Name: SAV 2022
  Description:
  Prototype:
  ST: null
  Surveyed: null
  QUADID: null
  BEDID: null
  DENSITY: null
  BEDLABEL: null
  ZONE_: null
  CBPSEG: null
  
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Capabilities: Query

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Supports Query With Historic Moment: false

Supports Coordinates Quantization: true

Supported Operations:   Query   Query Attachments   Calculate   Validate SQL   Generate Renderer   Return Updates   Iteminfo   Thumbnail   Metadata