Integrated hard and soft bottom seafloor substrate map of Ta'u, American Samoa, combining NOAA Pacific Island Fisheries Science Center Coral Reef Ecosystem Division hard-soft substrate map with NOAA Center for Coastal Monitoring and Assessment Biogeography Program shallow-water benthic habitat map of American Samoa.

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information
• CoRIS

Identification_Information:

Citation:

Citation_Information:

Originator:

Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)

Publication_Date: 20130125

Title:

Integrated hard and soft bottom seafloor substrate map of Ta'u, American Samoa, combining NOAA Pacific Island Fisheries Science Center Coral Reef Ecosystem Division hard-soft substrate map with NOAA Center for Coastal Monitoring and Assessment Biogeography Program shallow-water benthic habitat map of American Samoa.

Geospatial_Data_Presentation_Form: digital data

Online_Linkage:

http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_tau_geomorph.htm

Online_Linkage: https://www.soest.hawaii.edu/pibhmc/cms/

Description:

Abstract:

Hard and soft seafloor substrate map, derived from integrating two existing map products: hard and soft seafloor substrate map derived from an unsupervised classification of multibeam backscatter and bathymetry derivatives, produced by NOAA Pacific Island Fisheries Science Center Coral Reef Ecosystem Division (CRED), and shallow-water benthic habitat map of American Samoa, produced by NOAA Center for Coastal Monitoring and Assessment Biogeography Program. Please refer to separate metadata and documentation for these two products: Substrate - hard bottom vs. soft bottom - 5 meter grid http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_tau_geomorph.htm Shallow-water benthic habitat map http://ccma.nos.noaa.gov/ecosystems/coralreef/us_pac_terr/ This data is for Ta'u Island, Territory of American Samoa, USA.

Purpose:

The hard and soft seafloor map previously produced by NOAA Pacific Islands Fisheries Science Center Coral Reef Ecosystem Division is being used to improve sampling techniques for long-term ecosystem monitoring, to guide future ground-truthing operations and to identify coral-rich and species specific environments. By combining this initial product with the shallow-water benthic habitat map produced by NOAA Biogeography Branch, a more complete hard and soft substrate map is produced, which fills in many of the gaps in shallow water.

Supplemental_Information:

The hard and soft substrate map produced by NOAA Pacific Islands Fisheries Science Center Coral Reef Ecosystem Division was derived using Reson 8101 backscatter data, bathymetric variance (at 2 scales) and bathymetric rugosity. The sonar frequency is 240 kHz for the Reson 8101 multibeam data. Bathymetry and backscatter data were resampled to 5 m grid cell size prior to the classification. As limited seafloor photographs for groundtruthing were available for Ta'u the classification was unsupervised. However, in locations such as French Frigate Shoals, NWHI and Tutuila, American Samoa, where ground truth data were available, the unsupervised classification method has been found to be a good predictor of substrate type in similar depth ranges and seafloor environments. The shallow-water habitat map produced by NOAA Biogeography Branch was derived by digitally delineating habitat boundaries from georeferenced sonar and orthorectified IKONOS satellite imagery in ArcGIS using the NOAA Habitat Digitizing extension. A first draft map was completed, and areas identified for ground validation. At each ground validation point benthic habitat was characterized by drop camera, free diving or surface observation. A second draft map was produced incorporating the ground validation data.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2002

Ending_Date: 2010

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -169.597758

East_Bounding_Coordinate: -169.410175

North_Bounding_Coordinate: -14.186811

South_Bounding_Coordinate: -14.286236

Keywords:

Theme:

Theme_Keyword_Thesaurus: NCEI Geoportal Filter

Theme_Keyword: CoRIS_Metadata

Theme:

Theme_Keyword_Thesaurus: CRCP Project

Theme_Keyword:

Benthic Habitat Mapping and Characterization in the Pacific Islands Region

Theme_Keyword: 467

Theme:

Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus

Theme_Keyword:

EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Habitats

Theme_Keyword:

EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping

Theme_Keyword:

EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > geomorphology Mapping

Theme_Keyword:

EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > Habitat Mapping

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: imageryBaseMapsEarthCover

Theme_Keyword: 010

Theme:

Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus

Theme_Keyword: Geographic Information > Habitats

Place:

Place_Keyword_Thesaurus: CoRIS Place Thesaurus

Place_Keyword: OCEAN BASIN > Pacific Ocean > Manu'a Group > Ta'u (14S169W0015)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > American Samoa > Ta'u Island > Ta'u (14S169W0015)

Place_Keyword:

OCEAN BASIN > Pacific Ocean > Manu'a Group > Ta'u Island (14S169W0012)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Ta'u Island (14S169W0012)

Place:

Place_Keyword_Thesaurus: CoRIS Region

Place_Keyword: AmSam

Access_Constraints: None

Use_Constraints:

These data are not to be used for navigation purposes. Please acknowledge the NOAA Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center and the Pacific Islands Benthic Habitat Mapping Center, School of Ocean and Earth Science and Technology, University of Hawaii as the sources of this information.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)

Contact_Address:

Address_Type: mailing and physical address

Address: NOAA IRC

Address: NMFS/PIFSC/CRED

Address: 1845 WASP Blvd., Building 176

City: Honolulu

State_or_Province: HI

Postal_Code: 96818

Country: USA

Contact_Voice_Telephone: 808 725-5360

Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov

Browse_Graphic:

Browse_Graphic_File_Name:

http://www.soest.hawaii.edu/pibhmc/amsamoa_images/tau_5m_hs_int_445.jpg

Browse_Graphic_File_Description: Hard and Soft Seafloor Substrate

Browse_Graphic_File_Type: JPEG, PDF

Data_Set_Credit:

PIBHMC, CRED, PIFSC, NOAA, JIMAR, NOS, NCCOS, CCMA, Biogeography Program

Security_Information:

Security_Classification_System: Not applicable

Security_Classification: Unclassified

Security_Handling_Description: Not applicable

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Data are collected for resource management and research purposes and are tested for internal consistency; however, no effort is made to compare these data to external references or to other published data.

Logical_Consistency_Report:

These data are believed to be logically consistent though no tests were performed

Completeness_Report: Complete

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Horizontal positioning system: GPS (SPS) Horizontal position accuracy: 25 meters

Lineage:

Process_Step:

Process_Description:

The process description to produce the CRED hard-soft substrate map can be found in the metadata for that product: Substrate - hard bottom vs. soft bottom - 5 meter grid ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/benthichabitatlayers/tau_5m_hardsoft.txt The process description to produce the Biogeography Program shallow-water benthic habitat map can be found in the metadata for that product: https://products.coastalscience.noaa.gov/collections/benthic/e99us_pac/ To combine the two maps, several steps had to be first taken with the Biogeography Program shallow-water benthic habitat map. First polygons were deleted that were not required for this product; the polygons covering Ofu-Olosega were deleted, leaving only Ta'ua. Then polygons where the Major Reef Structure (M_STRUCT) was either 'Unknown' or 'Other Delineations' were deleted, leaving only polygons where M_STRUCT was 'Coral Reef and Hardbottom' or 'Unconsolidated Sediment.' The polygon shapefile was then converted into an ArcGIS Raster, using the ArcGIS tool, 'Polygon To Raster.'The raster values were checked to ensure that the same value was equivalent to hard substrate as in the CRED hard-soft map, where 'Coral Reef and Hardbottom' was classed as 'hard' and 'Unconsolidated Sediment' was classed as 'soft'. To combine the two maps, the two raster layers were mosaiced, using the ArcGIS tool, 'Mosaic To New Raster.' Where there was overlap between the two datasets, the CRED hard-soft map was prioritized. although the extent of overlap was very little, and the classification of hard and soft substrate at the boundaries matched well.

Process_Date: 20121205

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 4002

Column_Count: 2188

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: -2

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -171

Latitude_of_Projection_Origin: 0

False_Easting: 500000

False_Northing: 10000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 5

Ordinate_Resolution: 5

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984

Ellipsoid_Name: WGS_1984

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257224

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name: mean lower low water

Depth_Resolution: 0.01

Depth_Distance_Units: meters

Depth_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview: none

Entity_and_Attribute_Detail_Citation: none

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)

Contact_Address:

Address_Type: mailing and physical address

Address: NOAA IRC

Address: NMFS/PIFSC/CRED

Address: 1845 WASP Blvd., Building 176

City: Honolulu

State_or_Province: HI

Postal_Code: 96818

Country: USA

Contact_Voice_Telephone: 808 725-5360

Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov

Resource_Description: Downloadable Data

Distribution_Liability:

These data are not to be used for navigational purposes. NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Arc ASCII

Format_Information_Content:

Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCIItoRaster).

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/benthichabitatlayers/tau_5m_hs_int.zip

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20220504

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)

Contact_Address:

Address_Type: mailing and physical address

Address: NOAA IRC

Address: NMFS/PIFSC/CRED

Address: 1845 WASP Blvd., Building 176

City: Honolulu

State_or_Province: HI

Postal_Code: 96818

Country: USA

Contact_Voice_Telephone: 808 725-5360

Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: universal time

Metadata_Access_Constraints: None

Metadata_Use_Constraints: None

CoRIS:

CoRIS_Metadata_Link:

https://www.coris.noaa.gov/metadata/records/html/tau_5m_hs_int.html

CoRIS_Tracking_ID: 6621