Grays Reef Benthic Habitats

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: NOAA/NOS/NCCOS/CCMA Biogeography Team
Publication_Date: 20030501
Title: Grays Reef Benthic Habitats
Edition: One
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Silver Spring, Maryland, USA
Publisher: NOAA/NOS/NCCOS/CCMA Biogeography Team
Online_Linkage: <http://biogeo.nos.noaa.gov/>
Larger_Work_Citation:
Citation_Information:
Originator: NOAA/NOS/NCCOS/CCMA Biogeography Team
Publication_Date: 20000101
Title: Benthic Mapping
Publication_Information:
Publication_Place: Silver Spring, Maryland, USA
Publisher: NOAA/NOS/NCCOS/CCMA Biogeography Team
Online_Linkage: <http://biogeo.nos.noaa.gov/>
Description:
Abstract:
Bottom features were mapped based on sonar data at Gray's Reef National Marine Sanctuary (GRNMS). Backscatter from sidescan and bathymetry from multibeam sonar were used in conjunction with scuba and towed video to delineate bottom features.
Purpose:
The GRNMS mapping project provided the first-ever fine-scale benthic maps of the sanctuary. The maps will be used as a spatial framework for conducting change analysis and stratifying other management and research activities.
Supplemental_Information:
A detailed report on the project is available from the web site listed above.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20010626
Ending_Date: 20010704
Currentness_Reference: sonar data collected
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -80.922948
East_Bounding_Coordinate: -80.827183
North_Bounding_Coordinate: 31.421803
South_Bounding_Coordinate: 31.362137
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: benthic mapping
Theme_Keyword: sonar
Theme_Keyword: backscatter
Theme_Keyword: live bottom
Theme_Keyword: hard bottom
Theme_Keyword: sanctuary
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Gray's Reef
Place_Keyword: National Marine Sanctuary
Place_Keyword: NMS
Place_Keyword: Georgia bight
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA/NOS/NCCOS/CCMA Biogeography Team
Contact_Person: Matt Kendall/Mark Monaco
Contact_Position: Marine Biologist
Contact_Address:
Address_Type: mailing and physical address
Address: 1305 East-West Highway
City: Silver Spring
State_or_Province: Maryland
Postal_Code: 20910
Country: USA
Contact_Voice_Telephone: 301-713-3028
Contact_Facsimile_Telephone: 301-713-4388
Contact_Electronic_Mail_Address: matt.kendall@noaa.gov
Hours_of_Service: Monday-Friday, 8am-5pm, Eastern Standard Time
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Thematic accuracy was estimated to be 95% based on independent ground truth data.
Logical_Consistency_Report:
These data are beleived to be logically consistent and were checked for double polygons and overlap.
Completeness_Report: All bottom area of the Sanctuary was mapped.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Polygon delineations were digitized directly on georeferenced sonar imagery and is therefore exected to have similar positional accuracy. Sonar mosaics were estimated to have a horizontal accuracy of 10-20 m.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: No vertical positions were included.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: NOAA National Ocean Survey
Publication_Date: 20010704
Title: NOAA Hydrographic Survey
Edition:
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Silver Spring, Maryland, USA
Publisher: NOAA National Ocean Survey
Other_Citation_Details:
Online_Linkage:
Larger_Work_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Publication_Information:
Publication_Place:
Publisher:
Online_Linkage:
Source_Scale_Denominator: unknown
Type_of_Source_Media: sonar returns
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20010626
Ending_Date: 20010704
Source_Currentness_Reference: 20010704
Source_Contribution:
Backscatter and bathymetry data used for interpreting bottom features
Process_Step:
Process_Description:
Bottom types were visually interpreted from sonar mosaics using a custom GIS application for ArcView 3.2. Digitizing was done at a sclae of 1:1000 with a minimum mapping unit of 100m^2. A detailed report on methods is available from the website listed above. Sonar mosaics were created from individual sonar tracklines at Skidaway Institute of Oceanography.
Process_Date: 20020601
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Clark Alexander
Contact_Organization: Skidaway Institute of Oceanography
Contact_Position: Professor
Contact_Address:
Address_Type: mailing and physical address
Address: 10 Ocean Science Circle
City: Savannah
State_or_Province: Georgia
Postal_Code: 31411
Country: USA
Contact_Voice_Telephone: 912-598-2329
Contact_Facsimile_Telephone: 912-598-2310
Contact_Electronic_Mail_Address: clark@skio.peachnet.edu
Hours_of_Service: M-F, 9am-5pm, EST
Process_Step:
Process_Description: Metadata imported.
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 4694
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000000
Longitude_Resolution: 0.000000
Geographic_Coordinate_Units: Decimal degrees
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: gr_benthic
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: UNIQUEID
Attribute:
Attribute_Label: MAJOR_CAT_
Attribute:
Attribute_Label: MINOR_CAT_
Attribute:
Attribute_Label: POLYNUM
Attribute:
Attribute_Label: AREA
Attribute:
Attribute_Label: PERIMETER
Attribute:
Attribute_Label: HECTARES
Overview_Description:
Entity_and_Attribute_Overview:
Four polygon types are mapped: Densely Colonized: Bottom composed of exposed limestone substrate that is colonized with a nearly continuous coverage of sessile benthic organisms such as soft corals, sponges, and tunicates. Between 60 and 100 percent of the bottom is colonized. Typically, only ledges and other areas of bathymetric relief are densely colonized. In contrast, flat limestone typically has only a sparse colonization of sessile invertebrates. Ledges typically have a vertical relief of 0.5 to 2 m. Sparsely Colonized: Bottom composed of partially exposed limestone substrate that is colonized with a sparse assemblage of sessile benthic organisms such as soft corals, sponges, and tunicates. Between 1 and 60 percent of the bottom area is colonized. A thin veneer of sand 1-2 cm thick may cover much of the bottom but is thin enough to allow sessile benthic organisms to attach to the limestone. Typically, this bottom type covers large contiguous areas of very low relief bottom. Rippled Sand: Sediment deposited in sufficient thickness such that regular ridges or waves are formed. The ridges generally run from north to south in this region due to the orientation of tidal currents. Typically, these ridges are 6-10 cm in height from crest to trough and are 40-60 cm in length from crest to crest. Troughs are often dominated by coarser material such as shell fragments while crests are primarily composed of sand. Sand Plain: Coarse sediment occurring as a stable, flat region. Thickness is variable but may be only a few centimeters overlying flat limestone. Bioturbation is often present from polychaets, echinoderms, and burrowing fishes and ranges from reworking of surface material to mound building and other excavations.
Entity_and_Attribute_Detail_Citation:
Detailed descrition of map attributes is available from the website listed above.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA/NOS/NCCOS/CCMA Biogeography Team
Contact_Person: Matt Kendall/Mark Monaco
Contact_Position: Marine Biologist
Contact_Address:
Address_Type: mailing and physical address
Address: 1305 East-West Highway
City: Silver Spring
State_or_Province: Maryland
Postal_Code: 20910
Country: USA
Contact_Voice_Telephone: 301-713-3028
Contact_Facsimile_Telephone: 301-713-4388
Contact_Electronic_Mail_Address: matt.kendall@noaa.gov
Hours_of_Service: M-F, 9am-5pm, EST
Resource_Description: Benthic Maps of Gray's Reef National Marine Sanctuary
Distribution_Liability:
Users must assume responsibility to determine the appropriate use of the data. Contact Gray's Reef NMS for more detailed information.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 7.229
Digital_Transfer_Option:
Offline_Option:
Custom_Order_Process:
Map products are avilable for download from the website...<http://biogeo.nos.noaa.gov/>
Metadata_Reference_Information:
Metadata_Date: 20050216
Metadata_Review_Date: 20030501
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA/NOS/NCCOS/CCMA Biogeography Team
Contact_Person: Matt Kendall/Mark Monaco
Contact_Position: Marine Biologist
Contact_Address:
Address_Type: Mailing and physical address
Address: 1305 East-West Highway
City: Silver Spring
State_or_Province: Maryland
Postal_Code: 20910
Country: USA
Contact_Voice_Telephone: 301-713-3028
Contact_Facsimile_Telephone: 301-713-4388
Contact_Electronic_Mail_Address: matt.kendall@noaa.gov
Hours_of_Service: M-F, 8am-5pm, EST
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.8.6 on Wed Feb 16 09:11:56 2005