Name: Seagrass Classification Results - Apr-2016

Display Field:

Type: Raster Layer

Geometry Type: null

Description: Seagrass cover was mapped using automated classification methods from high resolution, archived satellite imagery acquired between 2011 and 2016, where spectral and environmental conditions permit (e.g., appropriate cloud cover, glint, and turbidity). Satellite imagery consisted of archived WorldView (WV-2 and WV-3) and GeoEye-1 images which were obtained from the US Geological Survey. Image scenes were selected based on water clarity conditions, radiometric image quality, and availability of concurrent in situ observations. Prior to classification satellite imagery were mosaicked and corrected for radiometric inconsistencies, and geometric errors. A Maximum Likelihood (ML) classification method was performed to classify seagrass percent cover from depth-corrected images using ArcGIS Spatial Analyst software. The ML method classified pixel values by relating percent cover observations to depth-corrected spectral values within a two-meter radius of each georeferenced quadrat. The bathymetric grid was also used as a ML classification variable. Upon multiple classification iterations, percent cover was binned into ordinal percent cover categories to achieve optimum classification. Training data and the resulting ML output were classified into five percent cover categories (<5%, 5-25%, 25-50%, 50-75%, 75-100%). An additional 200 training points were added in deeper water (>2.8m) to reduce classification errors outside of the typical optical zone for seagrass in the IRL.

Copyright Text: Florida Fish and Wildlife Conservation Commission

Default Visibility: false

MaxRecordCount: 0

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: false

Supports Statistics: false

Has Labels: false

Can Modify Layer: false

Can Scale Symbols: false

Use Standardized Queries: true

Extent:

XMin: 714620.9683416034
YMin: 479036.31134058704
XMax: 733684.8478280102
YMax: 499520.1922287381
Spatial Reference: PROJCS["PCS_Albers",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",400000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-84.0],PARAMETER["Standard_Parallel_1",24.0],PARAMETER["Standard_Parallel_2",31.5],PARAMETER["Latitude_Of_Origin",24.0],UNIT["Meter",1.0]]

Drawing Info:

N/A

Advanced Query Capabilities:

Supports Statistics: false
Supports OrderBy: false
Supports Distinct: false
Supports Pagination: false
Supports TrueCurve: false
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: false
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeNone

Type ID Field: null

Fields: None


Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata