St. John Benthic Habitat Mapping - Moderate Depth Ground Validation Sites (Mean Locations)

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Bryan Costa, NOAA/NOS/NCCOS/CCMA Biogeography Branch
Publication_Date: 2009
Title:
St. John Benthic Habitat Mapping - Moderate Depth Ground Validation Sites (Mean Locations)
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Silver Spring, MD
Publisher:
NOAA's Ocean Service, National Centers for Coastal Ocean Science (NCCOS)
Other_Citation_Details:
Please use citation for the written document "Moderate-Depth Benthic Habitats of St. John, U.S. Virgin Islands" when using these data.
Online_Linkage: <http://ccma.nos.noaa.gov/ecosystems/coralreef/benthic/>
Larger_Work_Citation:
Citation_Information:
Originator:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
Publication_Date: 2009
Title: Benthic Habitats of St. John, U.S. Virgin Islands
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Silver Spring, MD
Publisher: NOAA National Centers for Coastal Ocean Science
Other_Citation_Details:
Zitello, A.G., L.J. Bauer, T.A. Battista, P.W. Mueller and M.S. Kendall. 2009. Benthic Habitats of St. John, U.S. Virgin Islands. NOAA Technical Memorandum NOS NCCOS 96. 50 pp.
Description:
Abstract:
Benthic habitats of the moderate-depth marine environment in and around the Virgin Islands Coral Reef National Monument were mapped using a combination of semi-automated classification and visual interpretation of acoustic imagery. The objective of this effort, conducted by NOAA's Center for Coastal Monitoring and Assessment - Biogeography Branch in partnership with the U.S. National Park Service (NPS), was to provide spatially-explicit information on the moderate-depth habitat types, biological cover and live coral cover south of St. John. The data contained in this shapefile represent the mean locations of the 117 ground validation (GV) sites explored by NOAA field scientists to further refine habitat map classification. Considering vessel drift during habitat characterization, the entire evaluation period was most accurately represented by a series of GPS points logged at five-second intervals.
Purpose:
Extensive field work is needed to create high-quality benthic habitat maps because it enhances the accuracy of habitat attribution and (to a lesser degree) habitat delineation. Given the importance of field work, the primary purpose of this survey data was to explore and verify existing habitat information on the seafloor. In particular, these ground validation locations were targeted by the cartographer to satisfy the following objectives:

1. Explore features in the imagery with unknown or confusing acoustic signatures 2. Confirm that the habitat type correlated with a particular acoustic signature remained consistent throughout the entire study area.

This information was incorporated into a fine-scale assessment of the status, abundance, and distribution of moderate-depth marine habitats of St. John. The NOAA effort provides the U.S. National Park Service with increased technical capacity for ocean exploration, management, and stewardship. Direct implications to management measures include evaluation of management efficacy, a spatial framework for improved monitoring sampling design, improved assessment of human-use impacts, and marine spatial planning to support alternative marine protected area boundary alternatives.

Supplemental_Information:
The creation of high-quality benthic habitat maps required extensive field work to enhance accuracies of habitat attribution and, to a lesser degree, habitat delineation. Data were collected on 117 ground validation sites during several different field missions between 1/5/2009 - 6/7/2009 aboard U.S. National Park Service small research vessels. As anchoring at each site was not feasible for rapid assessment, wind and wave effects caused the survey vessel to drift along a transect. Post-processing of the GPS data allowed for a series of points to represent the actual survey location.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20090105
Beginning_Time: unknown
Ending_Date: 20090607
Ending_Time: unknown
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -64.788768
East_Bounding_Coordinate: -64.664479
North_Bounding_Coordinate: 18.312230
South_Bounding_Coordinate: 18.238926
Keywords:
Theme:
Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
Theme_Keyword: EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
Theme:
Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
Theme_Keyword: Geographic Information > Habitats
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: coral reef
Theme_Keyword: benthic habitats
Theme_Keyword: reef
Theme_Keyword: submerged aquatic vegetation
Theme_Keyword: unconsolidated sediments
Theme_Keyword: zone
Theme_Keyword: geomorphological structure
Theme_Keyword: biological cover
Theme_Keyword: ground validation
Theme_Keyword: transect
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: 010
Theme_Keyword: environment
Theme_Keyword: 007
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: United States
Place_Keyword: U. S. Virgin Islands
Place_Keyword: St. John
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword:
COUNTRY/TERRITORY > United States of America > U. S. Virgin Islands > St. John > St. John (18N064W0011)
Place_Keyword:
OCEAN BASIN > Atlantic Ocean > Caribbean Sea > Virgin Islands > Virgin Islands > St. John (18N064W0011)
Place:
Place_Keyword_Thesaurus: CoRIS Region
Place_Keyword: USVI
Access_Constraints: None
Use_Constraints: Not for navigation.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Bryan Costa
Contact_Organization:
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch
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
Contact_Voice_Telephone: 301-713-3028 x146
Contact_Facsimile_Telephone: 301-713-4384
Contact_Electronic_Mail_Address: bryan.costa@noaa.gov
Hours_of_Service: 0800 - 1700, Monday to Friday, EST
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The points in this data layer were acquired by GPS data using a Trimble GeoXT receiver. All data point characteristics were recorded in the GPS data logger automatically and seamlessly transferred to ArcGIS shapefiles using Trimble Pathfinder Office software. Attributes are all expected to be correct.
Logical_Consistency_Report:
Data points were collected with mapping-grade GPS receivers. The data were post processed for differential correction to the Continually Operating Reference System (CORS) station at St. Thomas, U.S. Virgin Islands (VITH).

All attribute information was recorded by the GPS receiver and stored directly in the raw GPS files. This automated process was assumed to be error free. This file is believed to be logically consistent.

Completeness_Report:
117 field positions were occupied and habitat characterizations were conducted for ground validation during this work.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The true positional accuracy of individual epics was determined to be within 1 m for 96% of the logged points. However, it is estimated that horizontal accuracies may be 0 - 20m from the true position of the underwater camera assessment due to line "lay-back" during drift.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: NOAA
Publication_Date: 2009
Title: GPS data
Type_of_Source_Media: GPS data
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2009
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: Trimble SSF files
Source_Contribution:
GPS data, which were originally recorded as code-phase signals in Trimble SSF format, were differentially post-processed to the Continually Operating Reference System (CORS) station at St. Thomas, U.S. Virgin Islands (VITH).
Process_Step:
Process_Description:
A first draft benthic habitat map was generated using edge detection algorithms to delineate features on the seafloor with discrete acoustic signatures. During the creation of this first draft map, the cartographer placed discrete points on features in the map that had unknown acoustic signatures. Points were also placed on features with known acoustic signatures (evenly distributed throughout the geographic extent of the map) to confirm that the habitats associated with these signatures remained consistent through the area of interest. These two types of points were labeled as "ground validation" sites and were visited in the field.
Process_Date: 2009
Process_Step:
Process_Description:
NOAA scientists explored these ground validation locations using a manually operated drop camera. The resulting GPS and video information was processed, analyzed and used to train the classification algorithm that was used to generate the second draft map. At the start of every morning, the boat captain selected a general region to begin the day's work. Navigating to field locations was accomplished using a Garmin GPS 76 device with the uploaded GV site coordinates. The boat captain maneuvered the vessel to within 5 m of the target location and made every effort to maintain that location without jeopardizing crew and equipment safety. Once on site, NOAA scientists would simultaneously deploy a SeaViewer Sea-Drop 950 camera and begin logging a waypoint on a Trimble GeoXT GPS receiver.While the video camera was capturing bottom imagery, an observer viewed the video real-time on a Panasonic Toughbook aboard the survey vessel. They categorized each site according to the levels of the habitat classification scheme: major and detailed geomorphological structure, major biological cover, percent major biological cover and percent coral cover. Data was entered into a custom data dictionary generated in Trimble Pathfinder Office software and loaded onto the Trimble data logger.
Process_Date: 2009
Process_Step:
Process_Description:
Trimble Pathfinder Office software was used to post process and differentially correct the raw GPS data to the Continually Operating Reference System (CORS) station at St. Thomas, U.S. Virgin Islands (VITH).
Process_Date: 2009
Process_Step:
Process_Description:
Precisely positioned GPS positions and its associated transects were viewed in a GIS to enhance the accuracy of the draft benthic habitat map. Polygon boundaries and habitat classifications were revised where field data necessitated changes.
Process_Date: 2009

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity Point
Point_and_Vector_Object_Count: 117

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: Coordinate Pair
Coordinate_Representation:
Abscissa_Resolution: 0.000001
Ordinate_Resolution: 0.000001
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

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: GVData_ModerateDepth_SitesMean
Entity_Type_Definition: Shapefile attribute table
Entity_Type_Definition_Source: None
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: Source
Attribute_Definition: The mission during which the site was visited
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Site_Type
Attribute_Definition: Type of site (i.e., GV or AA)
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Site_ID
Attribute_Definition: Unique site ID
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: VideoName
Attribute_Definition: Name of video associated with a site
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Xcoord
Attribute_Definition: X coordinate of the site in decimal degrees
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Variable
Attribute:
Attribute_Label: Ycoord
Attribute_Definition: Y coordinate of the site in decimal degrees
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Variable
Attribute:
Attribute_Label: Zone_
Attribute_Definition: Geographic Zone
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Maj_Struct
Attribute_Definition: Major Geomorphological Structure
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Det_Struct
Attribute_Definition: Detailed Geomorphological Structure
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Maj_Cover
Attribute_Definition: Major Biological Cover
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: P_Maj_Cov
Attribute_Definition: Percent density/patchiness of major biological cover
Attribute_Definition_Source: Unknown
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: P_Coral_Cv
Attribute_Definition: Percent live coral cover
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Cover
Attribute_Definition: Concatentation of major and percent biological cover
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Habitat
Attribute_Definition:
Concatenation of detailed geomorphological structure, biological cover and percent live coral cover
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program
Contact_Address:
Address_Type: mailing and physical address
Address: 1305 East West Highway
City: Silver Spring
State_or_Province: MD
Postal_Code: 20910
Contact_Voice_Telephone: 301-713-3028 x171
Contact_Facsimile_Telephone: 301-713-4384
Contact_Electronic_Mail_Address: tim.battista@noaa.gov
Hours_of_Service: 0800 - 1700, Monday to Friday, EST
Resource_Description: Downloadable Data
Distribution_Liability:
The National Oceanic and Atmospheric Administration (NOAA) National Centers for Coastal Ocean Science (NCCOS) is publishing this data on their website. NCCOS Biogeography Branch does not guarantee the accuracy of the geographic features or attributes. Please see the written report and metadata records for each data set for complete information on the source, limitations, and proper use.
Custom_Order_Process: Contact NOAA for distribution options (see Distributor).

Metadata_Reference_Information:
Metadata_Date: 20121220
Metadata_Review_Date: 20100226
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch
Contact_Address:
Address_Type: mailing and physical address
Address: 1305 East West Highway
City: Silver Spring
State_or_Province: MD
Postal_Code: 20910
Contact_Voice_Telephone: 301-713-3028
Contact_Facsimile_Telephone: 301-713-4384
Hours_of_Service: 0800 - 1700, Monday to Friday, EST
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: Local Time

CoRIS:
CoRIS_ID: 20100226073504
CoRIS_Children: None
CoRIS_Beginning_Date: 20090105
CoRIS_Ending_Date: 20090607
CoRIS_Metadata_Link:
<http://www.coris.noaa.gov/metadata/records/html/metadata_gvdata_moderatedepth_sitesmean.html>
CoRIS_Tracking_ID: 4498

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