Name: Changes_2012_2013

Display Field: BEDID

Type: Feature Layer

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Description: The 2013 Chesapeake Bay SAV Coverage was mapped from 1:24,000 black and white aerial photography 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: SAV Ecology, Monitoring, & Restoration Program, Virginia Institute of Marine Science

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Spatial Reference: 26918  (26918)

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Type ID Field: null

Fields:

• OBJECTID_1 ( type: esriFieldTypeOID, alias: FID )
• QUADID_1 ( type: esriFieldTypeInteger, alias: QUADID )
• BEDID_1 ( type: esriFieldTypeString, alias: BEDID, length: 2 )
• DENSITY_1 ( type: esriFieldTypeInteger, alias: DENSITY )
• BEDLABEL_1 ( type: esriFieldTypeString, alias: BEDLABEL, length: 6 )
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• Shape_Area ( type: esriFieldTypeDouble, alias: Shape_Area )
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• QUADID ( type: esriFieldTypeInteger, alias: QUADID )
• BEDID ( type: esriFieldTypeString, alias: BEDID, length: 2 )
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• ST ( type: esriFieldTypeString, alias: ST, length: 2 )
• Surveyed ( type: esriFieldTypeString, alias: Surveyed, length: 3 )
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• OBJECTID ( type: esriFieldTypeInteger, alias: OBJECTID )

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