View In:   ArcGIS Online Map Viewer

Name: Chesapeake Bay Dead Zones

Display Field: minimum

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: This dataset contains areas in the Chesapeake Bay with low amounts of oxygen. Excessive nitrogen and phosphorus pollution from human activities cause "dead zones"—or areas with low amounts of oxygen in the Bay. With little or no oxygen, fish, crabs, oysters, and other aquatic animals literally suffocate. Further, an excess in these nutrients also fuels the growth of dense algae blooms that block sunlight that underwater grasses need to grow in order to continue providing food for waterfowl and shelter for blue crabs and juvenile fish.

Copyright Text: MD iMAP, DNR

Default Visibility: true

MaxRecordCount: 27000

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: -8530067.6156
YMin: 4504149.882799998
XMax: -8409956.1774
YMax: 4808036.809299998
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Class Breaks Renderer:
Field: minimum
Min. Value: 0.17
ClassBreakInfos:
• Class Maximum Value: 0.2
  Label: <0.2 mg/l anoxic conditions
  Description:
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  Size: 4.0
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  XOffset: 0
  YOffset: 0
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• Class Maximum Value: 2
  Label: 0.2-2.0 mg/l hypoxic conditions
  Description:
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  Size: 4.0
  Angle: 0.0
  XOffset: 0
  YOffset: 0
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• Class Maximum Value: 3
  Label: 2-3 mg/l borderline lethal
  Description:
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  Size: 4.0
  Angle: 0.0
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• Class Maximum Value: 5
  Label: 3-5 mg/l stressful to some organisms
  Description:
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  Size: 4.0
  Angle: 0.0
  XOffset: 0
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• Class Maximum Value: 1000
  Label: >5 mg/l acceptable
  Description:
  Symbol:
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  Color: [0, 92, 230, 255]
  Size: 4.0
  Angle: 0.0
  XOffset: 0
  YOffset: 0
  Outline:
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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: 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 )
• x ( type: esriFieldTypeDouble, alias: X Coordinate, editable: true, nullable: true, defaultValue: null, modelName: x )
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• minimum ( type: esriFieldTypeDouble, alias: Minimum, editable: true, nullable: true, defaultValue: null, modelName: minimum )

Templates:

• Name: Chesapeake Bay Dead Zones
  Description:
  Prototype:
  y: null
  minimum: null
  x: null
  
  Drawing Tool: esriFeatureEditToolPoint

Capabilities: Query,Extract

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

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