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301-713-3028
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1305 East West Highway, N-SCI-1, SSMC 4
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Silver Spring
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Maryland
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http://coastalscience.noaa.gov/projects/detail?key=33
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2018-03-28
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Principal Component Surface (2011) for Fish Bay, St. John
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2013-11-30
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https://www.coris.noaa.gov/metadata/records/ISO/html/pca3_fishbay_resample_p3m_iso.html
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This image represents a 0.3x0.3 meter principal component analysis (PCA) surface for areas inside Fish Bay,
St. John in the U.S. Virgin Islands (USVI). It was created by integrating eight topographic complexity
surfaces (mean depth, standard deviation of depth, curvature, plan curvature, profile curvature, rugosity,
slope, and slope of slope). The eight complexity surfaces were rendered, stacked and exported to create one
image with several different bands (each band representing a specific complexity surface). This stacked
image was transformed into its first three principal components using the "Principal Components Analysis"
function in ENVI 5.0. The transformation reduced the dimensionality of the dataset by removing information
that correlated among the different bands (i.e., complexity surfaces). The resulting PCA GeoTIFF was created
to aid in the classification of benthic habitat inside Fish Bay, St. John.The original bathymetric surface
used to derive the tographic complexity surfaces and PCA was collected by Fugro LADS and funded by the
National Oceanic & Atmospheric Administration (NOAA). Bathymetry and reflectivity data were acquired
between 1/29/2011 - 2/28/2011using a LADS (Laser Airborne Depth Sounder) Mark II Airborne System from
altitudes between 1,200 and 2,200ft at ground speeds between 140 and 175 knots. The 900 Hertz Nd: YAG
(neodymium-doped yttrium aluminum garnet) laser (1064 nm) acquired 3x3 meter spot spacing and 200% seabed
coverage. Depths between 3 and 40 m were surveyed, producing a 3x3 m bathymetry and 3x3 m reflectivity
surface. These surfaces were resampled to 0.3x0.3 m to match the spatial resolution of the orthophotos
collected by the U.S. Army Corps of Engineers in 2012. Environmental factors such as wind strength and
direction, cloud cover, water clarity and depth influenced the area of data acquisition on a daily basis.
The data was processed using the LADS Mark II Ground System and data visualization, quality control and
final products were created using CARIS HIPS and SIPS and CARIS BASE Editor. All users should individually
evaluate the suitability of this data according to their own needs and standards.
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This principal component surface was created by NOAA to support the characterization of seafloor features in,
and creation of a benthic habitat map for, Fish Bay, St. John in the U.S. Virgin Islands (USVI). Habitat
maps provide a spatially explicit representation of benthic structure and biological cover. The spatial
products developed for this project will: (1) inform local managers as to the current distribution of
resources, (2) provide a point of comparison for past and future mapping efforts, (3) help locate sensitive
marine communities, and (4) guide monitoring efforts and prioritize management actions.
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Please cite the National Oceanic & Atmospheric Administration (NOAA), National Centers for Coastal Ocean
Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch (BB) in any use of
this data.
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National Oceanic & Atmospheric Administration, National Centers For Coastal and Ocean Science, Center for
Coastal Monitoring and Assessment
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301-713-3028
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301-713-4384
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1305 East West Highway, N-SCI-1, SSMC 4
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Silver Spring
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Maryland
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20910
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US
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http://coastalscience.noaa.gov/projects/detail?key=33
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NOT TO BE USED FOR NAVIGATION. Please cite the National Oceanic & Atmospheric Administration (NOAA),
National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA),
Biogeography Branch (BB) in any use of this data.
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NOT TO BE USED FOR NAVIGATION. Please cite the National Oceanic & Atmospheric Administration (NOAA),
National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA),
Biogeography Branch (BB) in any use of this data.
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301-713-3028
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301-713-4384
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1305 East West Highway, N-SCI-1, SSMC 4
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Silver Spring
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Maryland
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20910
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http://coastalscience.noaa.gov/projects/detail?key=33
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NOT TO BE USED FOR NAVIGATION. Please cite the National Oceanic & Atmospheric Administration (NOAA), National
Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography
Branch (BB) in any use of this data.