Accuracy Assessment Sites - Moderate-Depth Benthic Habitats of St. John, U.S. Virgin Islands (2009)

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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: 2009
Title:
Accuracy Assessment Sites - Moderate-Depth Benthic Habitats of St. John, U.S. Virgin Islands (2009)
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 Branch
Publication_Date: 2009
Title:
Moderate-Depth 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:
Costa, B.M., L.J. Bauer, T.A. Battista, P.W. Mueller and M.E. Monaco. 2009. Moderate-Depth Benthic Habitats of St. John, U.S. Virgin Islands. NOAA Technical Memorandum NOS NCCOS 105. Silver Spring, MD. 55 pp.
Description:
Abstract:
Benthic habitat maps of the moderate-depth marine environment of St. John, U.S. Virgin Islands were created using a combination of semi-automated classification and visual interpretation techniques 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 describing the moderate-depth (30 - 60 m) benthic habitat types and live coral cover present in and around VICRNM's southern boundaries. The data contained in this shapefile represent the position of the drop camera as it drifted over 299 accuracy assessment (AA) sites explored by NOAA field scientists.
Purpose:
The purpose of this survey data was to collect information on current habitat conditions at random locations throughout the mapping area. Locations were determined by an iterative, GIS-based, stratified random sampling technique to ensure that all bottom classifications would be assessed. This information was used to evaluate the thematic accuracy of the St. John moderate-depth benthic habitat map.
Supplemental_Information:
Data were collected on 299 ground validation sites over a two-week field mission from 5/31/09 to 6/7/09 aboard U.S. National Park Service small research vessels. Based on guidelines from other recent NOAA accuracy assessment analyses (Battista et al. 2007), a minimum of 25 points were assigned to each of the detailed structure classes within the draft habitat map. Additional points were distributed based on the proportion of area of each structure class in the map. Several pre-selected sites were inaccessible by field scientists or were not classified due to visibility restrictions.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20090531
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: -64.792032
East_Bounding_Coordinate: -64.661842
North_Bounding_Coordinate: 18.311470
South_Bounding_Coordinate: 18.238453
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: accuracy assessment
Theme_Keyword: point
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: 007
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: 010
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
Data_Set_Credit:
Costa, B.M., L.J. Bauer, T.A. Battista, P.W. Mueller and M.E. Monaco. 2009. Moderate-Depth Benthic Habitats of St. John, U.S. Virgin Islands. NOAA Technical Memorandum NOS NCCOS 105. Silver Spring, MD. 55 pp.
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 thematic data layer were acquired by GPS data using a Trimble GeoXT receiver with a customized data dictionary designed to reflect the habitat classification scheme described in "Moderate-Depth Benthic Habitats of St. John, U.S. Virgin Islands" (Costa et al. 2009). All habitat determinations were made in the field by trained NOAA scientists, recorded in the GPS data logger and seamlessly transferred to ArcGIS shapefiles using Trimble Pathfinder Office software. Attributes are all expected to be correct.
Logical_Consistency_Report:
Data points with accompanying attribute information 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). Site information was recorded in the field both in a data dictionary within the GPS receiver and on waterproof field sheets. A comparison between soft and hard copy data records were completed to ensure attribute collection consistency.

Furthermore, underwater video was recorded at each site to maintain a record of habitat condition. This video was reviewed by NOAA staff in the office to ensure correct habitat attribution was made in the field.

All errors were identified through these quality assurance techniques and corrected. This file is believed to be logically consistent.

Completeness_Report:
299 field positions were occupied and habitat characterizations were conducted for accuracy assessment during this work. These data were plotted in concert with remotely sensed imagery to assess the benthic habitat classifications at random locations throughoout the map. Further analysis was conducted to calculate a suite of thematic accuracy assessment metrics and is described in Costaet al. (2009).
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. For each survey site, individual epics were averaged to generate a mean GPS point for each location.
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
Time_of_Day: unknown
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 benthic habitat map was generated from acoustic imagery and ground validation points using a combination of semi-automated classification and visual interpretation techniques. Target locations for the accuracy assessment of this habitat map were determined by an iterative, GIS-based, stratified random sampling technique to ensure that all bottom classifications would be assessed. Based on guidelines from other recent accuracy assessment analyses (Battista et al. 2007), a minimum of 25 points were assigned to each of the detailed structure classes within the draft habitat map. Additional points were distributed based on the proportion of area of each structure class in the map. Points were randomly placed within each class using Hawth's Analysis Tools (Beyer, 2004) in ArcGIS. Next, the number of points that fell within each detailed primary cover class was calculated. Where necessary, additional points were randomly added and re-distributed from classes with many points to ensure that there was a minimum of 25 points within each detailed cover class.
Process_Date: 2009
Process_Step:
Process_Description:
NOAA field scientists explored the accuracy assessment locations with a suite of assessment techniques depending on the conditions at each site. Sample locations were navigated to using a hand-held Garmin 76 CS WAAS-enabled GPS unit. Underwater video from a SeaViewer Sea-Drop 950 camera was taken at each site. A weight was tied to the bottom of the camera to help lower the camera to the bottom, and the camera operator adjusted the camera position to get a downward and side view of the habitat at each location. Video length depended on the habitat type and vessel drift, ranging from approximately 30 seconds to two minutes. Videos of large, homogeneous sand habitats were generally short while heterogeneous coral reef habitats (especially edges) were typically longer. While the video was being recorded, GPS waypoints were recorded on board the vessel using a Trimble GeoXT GPS receivers. This resulted in a string of epics that tracked boat position at each site. An observer categorized each site according to the video for each level of the map classification scheme: major/detailed geomorphological structure, major/detailed biological cover, and percent coral. Data was entered into a custom data dictionary on the Trimble data logger and recorded on waterproof data sheets.
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:
Ultimately, precisely positioned GPS positions and the associated classification data were viewed in a GIS to assess the accuracy of the draft benthic habitat map.
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: 8018

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: AAData_ModerateDepth_Sites
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: On what mission was the video collected
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Site_Type
Attribute_Definition: Type of drop camera point (i.e. GV or AA)
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Site_ID
Attribute_Definition: Unique identifier for each accuracy assessment site
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: Arbitrarily defined unique code
Codeset_Source: Specific to this field mission
Attribute:
Attribute_Label: VideoName
Attribute_Definition: Name of video associated with site
Attribute_Definition_Source: NOAA
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Max_PDOP
Attribute_Definition: Maximum Positional Dilution of Precision
Attribute_Definition_Source: Automatically generated by Trimble
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Max_HDOP
Attribute_Definition: Maximum Horizontal Dilution of Precision
Attribute_Definition_Source: Automatically generated by Trimble
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: GPS_Date
Attribute_Definition: Date of logged position
Attribute_Definition_Source: Automatically generated by Trimble
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 20090531
Range_Domain_Maximum: 20090607
Attribute:
Attribute_Label: GPS_Time
Attribute_Definition: Time of logged position
Attribute_Definition_Source: Automatically generated by Trimble
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 06:00:00am
Range_Domain_Maximum: 06:00:00pm
Attribute:
Attribute_Label: Vert_Prec
Attribute_Definition: Vertical Precision
Attribute_Definition_Source: Automatically generated by Trimble
Attribute_Domain_Values:
Unrepresentable_Domain: in meters
Attribute:
Attribute_Label: Horz_Prec
Attribute_Definition: Hortizontal Precision
Attribute_Definition_Source: Automatically generated by Trimble
Attribute_Domain_Values:
Unrepresentable_Domain: in meters
Overview_Description:
Entity_and_Attribute_Overview:
Specific details of the attributes and values therein can be found in Chapter 1: Benthic Habitat Classification Scheme of "Moderate-Depth Benthic Habitats of St. John, U.S. Virgin Islands" (Costa et al. 2009)
Entity_and_Attribute_Detail_Citation:
Costa, B.M., L.J. Bauer, T.A. Battista, P.W. Mueller and M.E. Monaco. 2009. Moderate-Depth Benthic Habitats of St. John, U.S. Virgin Islands. NOAA Technical Memorandum NOS NCCOS 105. Silver Spring, MD. 55 pp.

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, N-SCI-1, SSMC 4, 9th Floor
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
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:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), 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
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: 20100226053836
CoRIS_Children: None
CoRIS_Beginning_Date: 20090531
CoRIS_Ending_Date: 20090607
CoRIS_Metadata_Link:
<http://www.coris.noaa.gov/metadata/records/html/metadata_aadata_moderate_depth_sites.html>
CoRIS_Tracking_ID: 4495

Generated by mp version 2.9.13 on Thu Dec 18 10:44:09 2014