Parent Layer:
Submerged Aquatic Vegetation (SAV)
Name: SAV 2009
Display Field: sav2009
Type: Feature Layer
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Description: These individual layers depict the presence of Submerged Aquatic Vegetation (SAV) in the Choptank HFA for the year 2009. SAV distribution in the Chesapeake is currently measured on a yearly basis by the Virginia Institute of Marine Science (VIMS) SAV mapping program. SAV was mapped from1:24,000 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 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. State-wide versions of these layers are available from Maryland’s Mapping and GIS Data Portal (MD iMAP) for individual years as “Maryland Submerged Aquatic Vegetation - SAV 2009”.
Copyright Text: Virginia Institute of Marine Science
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sav2009
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