Name: SAV 2015

Display Field: BEDLABEL

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The 2015 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.

Copyright Text: MD iMAP, DNR, VIMS

Default Visibility: true

MaxRecordCount: 85000

Supported Query Formats: JSON, geoJSON

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Extent:

XMin: -8614573.6918
YMin: 4424262.652500004
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YMax: 4809913.574199997
Spatial Reference: 102100  (3857)

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Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: GIS Object ID )
• DENSITY ( type: esriFieldTypeInteger, alias: Density )
• BEDLABEL ( type: esriFieldTypeString, alias: Bed Label, length: 6 )
• CBPSEG ( type: esriFieldTypeString, alias: CBP Segment, length: 6 )
• SAV2015 ( type: esriFieldTypeString, alias: SAV 2015, length: 50 )
• Shape ( type: esriFieldTypeGeometry, alias: GIS Shape )
• Shape.STArea() ( type: esriFieldTypeDouble, alias: GIS Shape Area (m) )
• Shape.STLength() ( type: esriFieldTypeDouble, alias: GIS Shape Length (m) )

Supported Operations:   Query   Generate Renderer   Return Updates

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