Processed reflectance surface (3m) derived from airborne LiDAR for Buck Island, St Croix, US Virgin Island collected in 2011

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch
Publication_Date: 2011
Title:
Processed reflectance surface (3m) derived from airborne LiDAR for Buck Island, St Croix, US Virgin Island collected in 2011
Edition: 1st
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publication_Place: Silver Spring, MD
Publisher:
NOAA's National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS)
Online_Linkage: <http://ccma.nos.noaa.gov/products/biogeography/usvi_nps/data/>
Description:
Abstract:
This image represents a LiDAR (Light Detection & Ranging) 3x3 meter resolution relative seafloor reflectivity surface for an area including and surrounding Buck Island Reef National Monument (BUIS), St. Croix in the U.S. Virgin Islands (USVI). The image's horizontal coordinate system is NAD83 UTM 20 North. Fugro LADS, in collaboration with NOAA's NOS/NCCOS/CCMA Biogeography Branch, the University of New Hampshire and the National Park Service, acquired bathymetry, relative seafloor reflectivity and hyperspectral imagery in St. Croix from 2/21 to 2/22/2011. Hyperspectral data were acquired using a Hyspex VNIR-1600 sensor. Bathymetry and reflectivity data were acquired using 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. In total, 32.2 square kilometers of LiDAR relectivity were collected between 0 m and 49 m in depth. 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.
Purpose:
This LiDAR collection is an important effort in an ongoing NOAA scientific research mission in the US Caribbean to characterize nearshore to deep water coral reef habitats at depths down to 1,000 meters. The mission purpose is to better understand the resources within the surveyed reef habitats, and ultimately develop species utilization models linking physical habitats with biological information. The acquired bathymetry, relative seafloor reflectivity, and hyperspectral imagery will be used internally to characterize sea floor topography and to create benthic habitat maps, helping NOAA meet its mapping commitment to the US Coral Reef Task Force. The resulting publicly-distributed data is also a contribution to the greater scientific community interested in the USVI seafloor.
Supplemental_Information:
Depth_System_Definition Depth_Datum_Name MLLW Depth_Resolution Unknown Depth_Distance_Units meters Depth_Encoding_Method Explicit depth coordinate included with horizontal coordinates
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20110221
Ending_Date: 20110222
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -64.670039
East_Bounding_Coordinate: -64.554066
North_Bounding_Coordinate: 17.810112
South_Bounding_Coordinate: 17.767262
Keywords:
Theme:
Theme_Keyword_Thesaurus: NOS Data Explorer Topic Category
Theme_Keyword: Remotely Sensed Imagery/Photos
Theme:
Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
Theme_Keyword: Geographic Information > Backscatter
Theme:
Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
Theme_Keyword:
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Backscatter
Theme_Keyword:
EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat > Description
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: USVI
Theme_Keyword: US Virgin Islands
Theme_Keyword: St. Croix
Theme_Keyword: Buck Island Reef National Monument
Theme_Keyword: BUIS
Theme_Keyword: Backscatter
Theme_Keyword: Reflectivity
Theme_Keyword: Intensity
Theme_Keyword: Lidar
Theme_Keyword: LADS Mark II
Theme_Keyword: NOAA
Theme_Keyword: Biogeography
Theme_Keyword: GIS
Theme_Keyword: Habitat
Theme_Keyword: Benthic
Theme_Keyword: NPS
Theme_Keyword: Reef
Theme_Keyword: IOCM
Theme_Keyword: Integrated Ocean and Coastal Mapping
Theme_Keyword: Coral
Theme_Keyword: Seafloor
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme_Keyword: 006
Theme_Keyword: environment
Theme_Keyword: 007
Theme_Keyword: geoscientificInformation
Theme_Keyword: 008
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: 010
Theme_Keyword: oceans
Theme_Keyword: 014
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: USVI
Place_Keyword: US Virgin Islands
Place_Keyword: St. Croix
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword:
COUNTRY/TERRITORY > United States of America > U. S. Virgin Islands > U. S. Virgin Islands > U. S. Virgin Islands (17N064W0000)
Place_Keyword:
COUNTRY/TERRITORY > United States of America > U. S. Virgin Islands > St. Croix > Buck Island (17N064W0006)
Place_Keyword:
OCEAN BASIN > Atlantic Ocean > Caribbean Sea > Virgin Islands > Lesser Antilles > U. S. Virgin Islands (17N064W0000)
Place_Keyword:
OCEAN BASIN > Atlantic Ocean > Caribbean Sea > Virgin Islands > Buck Island > Buck Island (17N064W0006)
Place:
Place_Keyword_Thesaurus: CoRIS Region
Place_Keyword: USVI
Stratum:
Stratum_Keyword_Thesaurus: None
Stratum_Keyword: Seafloor
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 2011
Access_Constraints: Please cite any use of this data.
Use_Constraints:
Note: NOT TO BE USED FOR NAVIGATION. These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000

Data_Quality_Information:
Logical_Consistency_Report:
All users should independently analyze the dataset according to their own needs and standards to determine data usability.
Completeness_Report:
This GeoTIFF is sourced from a gridded dataset. The original full-resolution Lidar data was used to create a downsampled uniform-resolution surface in CARIS.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: None.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: None.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch
Publication_Date: Unpublished material
Title: Raw Lidar Data
Geospatial_Data_Presentation_Form: digital data
Type_of_Source_Media: external hard drive
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20110221
Ending_Date: 20110222
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: Raw Lidar Data
Source_Contribution: Original raw full resolution dataset.
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch
Publication_Date: Unpublished material
Title: Processed Lidar Data
Geospatial_Data_Presentation_Form: digital data
Type_of_Source_Media: external hard drive
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 201102
Ending_Date: 201103
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: Processed Lidar Data
Source_Contribution:
Processed, cleaned, and corrected full resolution dataset. Sourced from raw LADS data.
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch
Publication_Date: Unpublished material
Title: CARIS BASE Surface
Geospatial_Data_Presentation_Form: raster digital data
Type_of_Source_Media: external hard drive
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 201102
Ending_Date: 201103
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: BASE Surface
Source_Contribution:
Downsampled CARIS BASE (Bathymetry Associated with Statistical Error) grid with best reflectivity layer. Sourced from processed HDCS data.
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch
Publication_Date: 2011
Title:
GeoTIFF of 3x3 m Relative Reflectivity for Buck Island, St. Croix, 2011, UTM 20N NAD83
Geospatial_Data_Presentation_Form: raster digital data
Type_of_Source_Media: external hard drive
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 201102
Ending_Date: 201103
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: BUIS_Reflect_3m.tif
Source_Contribution:
Downsampled GeoTIFF raster containing relative reflectivity (intensity) values. These values do not have units given the complexity of modeling losses through the water-column and at the water/air interface. Because the dataset is of relative reflectivity rather than an absolute value for each point, the entire dataset is scaled to ensure the full dynamic range is used over the dataset. This scaling is applied over an entire survey area to ensure dataset consistency. Sourced from CARIS BASE surface.
Process_Step:
Process_Description:
James Guilford and Scott Ramsay from Fugro LADS lead this mapping effort. Hyperspectral data were acquired using a Hyspex VNIR-1600 sensor. Bathymetry and reflectivity data were acquired using 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. Green laser pulses are scanned beneath the aircraft in a rectilinear pattern. The pulses are reflected from the land, sea surface, within the water column and from the seabed. The height of the aircraft is determined by the infrared laser return, which is supplemented by the inertial height from the Attitude and Heading Reference System and GPS height. Real-time positioning is obtained by an Ashtech GG24 GPS receiver combined with Wide Area DGPS (Differential Global Positioning System) provided by the Fugro Omnistar to provide a differentially corrected position. Ashtech Z12 GPS receivers are also provided as part of the Airborne System and Ground Systems to log KGPS (Kinetic Global Positioning System) data on the aircraft and at a locally established GPS (Global Positioning System) base station.
Process_Date: 2011
Process_Step:
Process_Description:
The reflectivity of an LADS pulse is a measure of the amount of energy reflected from the seabed for each individual laser pulse at the wavelength of the laser, 532nm (green/blue). The basic difference between processing an ALB waveform for depth and for reflectivity is that depth processing focuses on the leading edge of the return waveform, whereas reflectivity requires integration of the entire return pulse. Each sounding is assessed for suitability. Dry soundings and soundings in very shallow water are not processed for reflectivity. Each sounding is normalized for the electronic gain applied to the photo multiplier tube to which the received laser energy is optically routed. The gain-normalized return waveform is then analyzed to determine energy returning from the seabed. Integration of the waveform from the seabed will produce a numerical value of reflectivity. To ensure that this value accurately and meaningfully describes variation in seabed reflectivity several parameters must be taken into consideration. Energy is lost from the pulses transmitted from the aircraft. These losses include the air/water interface and those through the water column, and any system specific losses such as optical filtering and receiver field of view. Reflectivity value, calculated for each pulse, is the ratio between the received energy normalized for the losses described and the transmitted energy. Once a relative reflectivity value has been calculated, further statistical cleaning to remove outliers is completed. Because the dataset is of relative reflectivity rather than an absolute value for each point, the entire dataset is scaled to ensure the full dynamic range is used over the dataset. This scaling is applied over an entire survey area to ensure dataset consistency (Collins et al. 2007). Collins et al. 2007 is available online here: <http://www.fugrolads.com/datasheets/Hydro_Intl_LiDAR_Seabed_Classification.pdf>
Source_Used_Citation_Abbreviation: Processed Lidar Data
Process_Date: 2011

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 1616
Column_Count: 4085
Vertical_Count: 1

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 20
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -63.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Row and Column
Coordinate_Representation:
Abscissa_Resolution: 3.000000
Ordinate_Resolution: 3.000000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch
Contact_Position:
Contact info is for CCMA general reception. Please ask for the project manager of Seafloor Characterization of the U.S. Caribbean
Contact_Address:
Address_Type: mailing and physical address
Address: 1305 East West Highway, N-SCI-1, SSMC 4, 9th Floor
City: Silver Spring
State_or_Province: MD
Postal_Code: 20910
Country: USA
Contact_Voice_Telephone: (301) 713-3028
Contact_Facsimile_Telephone: (301) 713-4384
Contact_Instructions:
Contact info is for CCMA general reception. Please ask for the project manager of Seafloor Characterization of the U.S. Caribbean
Resource_Description: Downloadable Data
Distribution_Liability:
These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: GeoTIFF
Transfer_Size: 13
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://coastalscience.noaa.gov/datasets/ccma/biogeo/usvi_nps/2011/lidar/buis_reflect_3m.zip>
Fees: None
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 201102

Metadata_Reference_Information:
Metadata_Date: 20121220
Metadata_Review_Date: 20120126
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA/NOS/NCCOS/CCMA Biogeography Branch
Contact_Person:
Project Manager - Seafloor Characterization of the U.S. Caribbean
Contact_Address:
Address_Type: mailing and physical address
Address: 1305 East West Highway, N-SCI-1, SSMC 4, 9th Floor
City: Silver Spring
State_or_Province: MD
Postal_Code: 20910
Country: USA
Contact_Voice_Telephone: (301) 713-3028
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: Local Time
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>


CoRIS:
CoRIS_ID: 20120126072311
CoRIS_Children: None
CoRIS_Beginning_Date: 20110221
CoRIS_Ending_Date: 20110222
CoRIS_Metadata_Link:
<http://www.coris.noaa.gov/metadata/records/html/metadata_buis_reflect_3m.html>
CoRIS_Tracking_ID: 6443

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