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General Information

File Identifier:	corisid:6935
Metadata Language:	eng; USA
Metadata Date Stamp:	2018-03-28
Organization:	National Oceanic & Atmospheric Administration, National Centers For Coastal and Ocean Science, Center for Coastal Monitoring and Assessment
Organization Role:	originator

Identification Information

Title:	Principal Component Surface (2011) for Fish Bay, St. John
Dataset Language:	eng; USA
Abstract:	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.
Data Type:	Grid

Data Theme

Theme Topics:

Imagery and Base Maps, Environment and Conservation, Geological and Geophysical, Oceans and Estuaries

Reference System Information

Reference System URN:

Spatial Domain

West Bounding Longitude:	-64.742406
South Bounding Latitude:	18.281614
East Bounding Longitude:	-64.634725
North Bounding Latitude:	18.368585

Contact Information

Organization:	National Oceanic & Atmospheric Administration, National Centers For Coastal and Ocean Science, Center for Coastal Monitoring and Assessment
Address:	1305 East West Highway, N-SCI-1, SSMC 4
City:	Silver Spring
State:	Maryland
Postal Code:	20910
Country:	US
Contact Website:	http://coastalscience.noaa.gov/projects/detail?key=33
Telephone:	301-713-3028
Fax:	301-713-4384

Distribution Information

Format Name:	Raster Dataset
Format Version:	January 2013
Distribution Link:	http://coastalscience.noaa.gov/projects/detail?key=33
Distribution Link Function:	Information

Metadata Reference Information

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