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The overall goal of the mapping effort was the production of spatially and thematically accurate seagrass habitat map for the 2016 timeframe using 2016 Natural Color 4-band multi-spectral digital imagery. Fieldwork was conducted in order to solve photointerpretation problems and to verify classifications of seagrass density. The resulting imagery and GIS database layers met National Map Accuracy Standards as described by the United States Geological Survey (USGS) for 1:12,000 scale map products. The objectives of this project were to: 1) Complete photo-interpretation of the imagery and GIS map production. 2) Complete an accuracy assessment of the resulting seagrass coverages and revise maps as needed. 3) Complete a narrative final report of mapping procedures and resulting coverage summaries. 4) Change Analysis Acreage Gains and Losses Spreadsheet. 5) Acreage Results Spreadsheet, data by segment and FLUCCs code. |
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The overall goal of the mapping effort was the production of spatially and thematically accurate seagrass habitat map for the 2016 timeframe using 2016 Natural Color 4-band multi-spectral digital imagery. Fieldwork was conducted in order to solve photointerpretation problems and to verify classifications of seagrass density. The resulting imagery and GIS database layers met National Map Accuracy Standards as described by the United States Geological Survey (USGS) for 1:12,000 scale map products. The objectives of this project were to: 1) Complete photo-interpretation of the imagery and GIS map production. 2) Complete an accuracy assessment of the resulting seagrass coverages and revise maps as needed. 3) Complete a narrative final report of mapping procedures and resulting coverage summaries. 4) Change Analysis Acreage Gains and Losses Spreadsheet. 5) Acreage Results Spreadsheet, data by segment and FLUCCs code. |
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Avineon Inc. of St. Petersburg, Florida was contracted by the District to produce a spatially, thematically, and technically accurate geodatabase of the benthic habitat for the 2016 timeframe occurring within the Springs Coast area of the Gulf of Mexico. Acknowledgement of the South West Florida Water Management District would be appreciated in products derived from this data. |
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5000 |
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The Southwest Florida Water Management District (SWFWMD) is responsible for the protection and management of natural systems and water quality within its geographic boundaries. One component of evaluating the ecological health of coastal ecosystems is to map and monitor submerged aquatic vegetation (SAV) communities. The AOI includes the mid-shore coastal waters of the District between Levy County to the north and to Pasco County to the south. Estuaries in the geographic area of interest include the Waccasassa River, Chassahowitzka River, Homosassa River, and the Weeki Wachee River. The project area includes 741 images (approximately 1,310 square miles) and extends from roughly 5 miles offshore to a maximum of 15 miles offshore. For the 2016 effort, the AOI was expanded from the previous 2012 footprint to incorporate complete Florida Department of Environmental Protection WIBIDs. For acreage reporting purposes the, the AOI for 2016 and the previous 2012 footprint were both trimmed to meet the boundary of the St. Joseph Sound and Clearwater Harbor, seagrass mapping extent of the AOI, as it existed in January 2016. Seagrass data were photo interpreted from 2016 Natural Color 4-band multi-spectral digital imagery using a Leica ADS100 sensor (Sensor head 100) operating with an inertial measuring unit (IMU) and a dual frequency GPS receiver. The project area was flown at an altitude of 11,300 feet above mean terrain (AMT). Imagery was acquired in two lifts on 20 January, 2016 and 01 March, 2016. Mapping shall be conducted with a minimum mapping unit of 0.5 acre for all benthic features and Oysters minimum mapping unit of 0.25 acre. Minimum mapping of 0.25 acre is allowable if situation deems appropriate but is not required. |
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The positional accuracy of this data meets USGS NMAS for 1:12000 scale maps. This data has a minimum classification accuracy of 90% for all categories. Mapping conventions applied to the delineation and classification of seagrass categories were: 1) Outer boundaries of beds are more important than internal structure (patchiness, shapes of sand patches within beds). 2) Outer boundaries of beds are more important than density categorization within beds. 3) Minimum Mapping Unit (MMU) is 0.5 acre for all benthic features and 0.25 acre for oysters. |
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SDERPT.SDECREATOR.SEAGRASS2016_SPRINGSCOAST |
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["Springs Coast","Seagrass","2016","Anclote / Pithlachascotee","SWFWMD","Benthic","Mapping","Aripeka / Hernando Beach","Waccassassa Bay","Habitat","Weeki Wachee /Chassahowitzka","Homosassa/Crystal River"] |
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en-US |
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50000 |
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