Principal Component Surface (2011) for Fish Bay, St. John

Metadata Updated: October 12, 2020

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 [HTML_REMOVED] 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.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Date March 28, 2018
Metadata Created Date October 12, 2020
Metadata Updated Date October 12, 2020
Reference Date(s) November 30, 2013 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from CoRIS Native ISO Metadata

Additional Metadata

Resource Type Dataset
Metadata Date March 28, 2018
Metadata Created Date October 12, 2020
Metadata Updated Date October 12, 2020
Reference Date(s) November 30, 2013 (publication)
Responsible Party National Oceanic & Atmospheric Administration, National Centers For Coastal and Ocean Science, Center for Coastal Monitoring and Assessment (Originator)
Contact Email
Access Constraints
Bbox East Long -64.634725
Bbox North Lat 18.368585
Bbox South Lat 18.281614
Bbox West Long -64.742406
Coupled Resource
Frequency Of Update notPlanned
Guid corisid:6935
Harvest Object Id 481e158d-e0e1-4b17-9746-43e9ef43ff19
Harvest Source Id 7ac0f82a-6d03-4815-b5c7-766952db2c4a
Harvest Source Title CoRIS Native ISO Metadata
Licence 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.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System 0
Spatial Harvester True
Temporal Extent Begin 2011-01-29
Temporal Extent End 2011-02-28

Didn't find what you're looking for? Suggest a dataset here.