Slope grid derived from gridded bathymetry of Rose Atoll, Territory of American Samoa, USA

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: 20100607
Title:

Slope grid derived from gridded bathymetry of Rose Atoll, Territory of American Samoa, USA

Geospatial_Data_Presentation_Form: raster digital data
Online_Linkage: http://www.soest.hawaii.edu/pibhmc
Online_Linkage:

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

Description:

Abstract:

Slope is derived from gridded (5 m cell size) multibeam bathymetry, collected aboard R/V AHI, and bathymetry derived from multispectral IKONOS satellite imagery. Cell values reflect the maximum rate of change (in degrees) in elevation between neighboring cells derived with the ArcGIS Spatial Analyst extension. This data set is for Rose Atoll, American Samoa.

Purpose:

The data were derived in support of NOAA Coral Reef Conservation Program goals. Goal 1 is to map all U.S. Coral Reef Ecosystems. This data set specifically addresses Objective 1 and 4: to develop high-resolution benthic maps and to characterize priority deep water reefs and associated habitats. This derivative of bathymetry provides a GIS layer that may be used for benthic and essential fish habitat characterization, and for the study of geologic features. By combining the dataset with bathymetry, backscatter, other derivatives, and in situ data, they collectively compose benthic habitat maps which are designed to be used to understand and predict moderate depth (~20m - 150m) benthic habitats for different organisms that inhabit coral reef ecosystems.

Supplemental_Information:

Gridded multibeam data were collected aboard the R/V AHI (Acoustic Habitat Investigator), a 25' survey launch owned and operated by the NOAA Pacific Islands Fisheries Science Center in Honolulu, HI. These data are integrated with bathymetry derived from multispectral IKONOS satellite data. The metadata for the bathymetry is documented in the product metadata, ros_5m_dbmb.asc.txt.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20020305
Ending_Date: 20060313

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -168.176599
East_Bounding_Coordinate: -168.131569
North_Bounding_Coordinate: -14.525005
South_Bounding_Coordinate: -14.563294

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 - American Samoa and the U.S. Pacific Remote Island Area

Theme_Keyword: 1084

Theme:

Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
Theme_Keyword: Geographic Information > Habitats

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: 010

Theme:

Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
Theme_Keyword:

EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat > Description

Theme_Keyword:

EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry

Theme_Keyword: EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Slope

Place:

Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword:

OCEAN BASIN > Pacific Ocean > American Samoa > Rose Atoll (14S168W0001)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Rose Atoll (14S168W0001)

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 Pacific Islands Fisheries Science Center (PIFSC) Coral Reef Ecosystem Division (CRED) and the Pacific Islands Benthic Habitat Mapping Center, and the Joint Institute for Marine and Atmospheric Research (JIMAR) and School of Ocean and Earth Science and Technology (SOEST), University of Hawaii as the sources of this information.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

Contact_Person: John Rooney

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

Contact_Voice_Telephone: 808 725-5360
Contact_Facsimile_Telephone: 808 725-5429
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred

Browse_Graphic:

Browse_Graphic_File_Name:

https://www.soest.hawaii.edu/pibhmc/amsamoa_images/Rose_5m_slope_445.jpg

Browse_Graphic_File_Description: Gridded Bathymetry Derivative
Browse_Graphic_File_Type: JPEG

Data_Set_Credit:

NOAA PIFSC CRED and the Pacific Islands Benthic Habitat Mapping Center, JIMAR and SOEST

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 C/A Horizontal position accuracy: 25 meters

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Range resolution of sonar: varies with depth Raw sounding resolution: varies with depth Vertical accuracy of gridded product ~ 1% of water depth

Lineage:

Process_Step:

Process_Description:

The Spatial Analyst extension was used in ArcMap 9.3 to derive slope from the gridded (5m) bathymetry. Spatial Analyst --> Surface Analysis --> Slope using the following parameters: Input surface: ros_5m_dbmb; Output measurement: Degree; Z factor: 1; Output cell size: 5 Artifacts are visible on the reef crest; these may be due to noise in the original IKONOS image, or discrepancies between the merged IKONOS and multibeam bathymetry.

Process_Date: 20100601

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:

Raster_Object_Type: Grid Cell
Row_Count: 835
Column_Count: 917
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

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:

Contact_Person: John Rooney

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

Contact_Voice_Telephone: 808 725-5360
Contact_Facsimile_Telephone: 808 725-5429
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred

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/Rose_5m_slope.zip

Fees: None

Slope grid derived from gridded bathymetry of Rose Atoll, Territory of American Samoa, USA

Metadata: