CRED Gridded 40m Bathymetry of Howland Island, Pacific Remote Island Areas, 2006

Metadata:

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

Identification_Information:

Citation:

Citation_Information:

Originator: Joyce E. Miller

Originator:

Coral Reef Ecosystem Division, NOAA Pacific Islands Fisheries Science Center, Pacific Island Benthic Habitat Mapping Center

Publication_Date: 200609

Title:

CRED Gridded 40m Bathymetry of Howland Island, Pacific Remote Island Areas, 2006

Geospatial_Data_Presentation_Form: raster digital data

Online_Linkage: <http://www.soest.hawaii.edu/pibhmc>

Description:

Abstract:

Gridded (40 m cell size) bathymetry of the shelf and slope environments of Howland Island, Pacific Remote Isand Areas, Central Pacific. Almost complete bottom coverage was achieved in depths between 8 and 3800 meters. The bathymetry dataset includes Simrad EM300, EM3002D, and Reson 8101ER multibeam data collected between Jan. 28-29, 2006.

Purpose:

The data were collected in support of Coral Reef Conservation Program goals to map all shallow (0-30 m) coral reefs in US Pacific waters and priority moderate (greater than 30 m) depth areas by 2009. The data are being used to provide bathymetric and backscatter data for previously unmapped areas; in support of ecosystem management requirements for benthic habitat mapping and location of Essential Fish Habitat; and to study the geologic features of the area.

Supplemental_Information:

Data were collected aboard the NOAA Ship Hiialakai, a 218' United States National Oceanic and Atmospheric Administration research ship. The NOAA Ship Hiialakai's survey sensors include a 30 kHz Simrad EM300 sonar and a 300 kHz Simrad EM3002D sonar, which provide bathymetry and imagery data, a TSS/Applanix POS/MV Model 320, which measures position, velocity, attitude and heading, and a Seabird SBE 9/11 plus CTD used to measure sound velocity profiles. Sensor configuration for the Hi'ialakai for cruise HI-06-01 is documented in the cruise/multibeam metadata file HI0601_MB_Metadata.txt.

Data were also 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. The R/V AHI's survey sensors include a 240 kHz RESON 8101-ER sonar providing bathymetry and imagery data, a TSS/Applanix POS/MV Model 320 which measures position, velocity, attitude and heading, and a Seabird SBE 19 CTD used to measure sound velocity profiles. Sensor configuration for the AHI for cruise AHI-06-01 is documented in the cruise/multibeam metadata file AHI0601_MB_Metadata.txt.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20060128

Ending_Date: 20060129

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -176.737566

East_Bounding_Coordinate: -176.56212

North_Bounding_Coordinate: 0.867447

South_Bounding_Coordinate: 0.741496

Keywords:

Theme:

Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus

Theme_Keyword:

EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry

Theme_Keyword: EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat

Theme_Keyword:

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

Theme_Keyword: EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: AHI0601

Theme_Keyword: Multibeam sonar

Theme:

Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus

Theme_Keyword: Numeric Data Sets > Bathymetry

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: elevation

Theme_Keyword: 006

Theme_Keyword: oceans

Theme_Keyword: 014

Place:

Place_Keyword_Thesaurus: CoRIS Place Thesaurus

Place_Keyword:

OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Howland Island > Howland Island (00S176W0001)

Place_Keyword:

COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Howland Island (00S176W0001)

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Pacific Remote Island Areas

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, Coral Reef Ecosystem Division, PIFSC, NOAA
and the Joint Institute for Marine and Atmospheric Research (JIMAR)

Contact_Person: Joyce Miller

Contact_Position: Oceanographer

Contact_Address:

Address_Type: mailing and physical address

Address: 1680 East-West Road, POST 833

City: Honolulu

State_or_Province: Hawaii

Postal_Code: 96822

Country: USA

Contact_Voice_Telephone: 808-956-5239

Contact_Electronic_Mail_Address: joyce.miller@noaa.gov

Browse_Graphic:

Browse_Graphic_File_Name:

<http://www.soest.hawaii.edu/pibhmc/pibhmc_pria_howland_bathy.htm#40meter>

Browse_Graphic_File_Description: Howland Island, 40m Gridded Bathymetry

Browse_Graphic_File_Type: JPG

Data_Set_Credit:

Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA and Pacific Islands Benthic Habitat Mapping Center, School of Ocean and Earth Science and Technology, University of Hawaii

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: Unspecified

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: Variable Raw sounding resolution: Variable Vertical accuracy of gridded product: Approximately 1 percent of water depth

Lineage:

Process_Step:

Process_Description:

Specifics of data processing are recorded in cruise metadata reports HI0601_MB_Metadata.txt and AHI0601_MB_Metadata.txt

Process_Date: 20060131

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 348

Column_Count: 488

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: 1

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -177

Latitude_of_Projection_Origin: 0

False_Easting: 500000

False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: Row and Column

Coordinate_Representation:

Abscissa_Resolution: 40

Ordinate_Resolution: 40

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:

Depth values are real values based on the average of the soundings that fell within the extracted grid cells. The number of soundings per grid cell range from greater than 1000 soundings in shallow depths to as few as 20 soundings in deeper areas. A total error budget for this survey has not been developed. Therefore, the accuracy of depth measurements should be considered to be within 1 per cent of water depth.

Entity_and_Attribute_Detail_Citation: none

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

Pacific Islands Benthic Habitat Mapping Center, Coral Reef Ecosystem Division (CRED),
Pacific Islands Fisheries Science Center (PIFSC), NOAA and JIMAR

Contact_Person: Joyce E. Miller

Contact_Position: Oceanographer

Contact_Address:

Address_Type: mailing and physical address

Address: 1680 East-West Road, POST 833

City: Honolulu

State_or_Province: Hawaii

Postal_Code: 96822

Country: USA

Contact_Voice_Telephone: 808-956-5239

Contact_Electronic_Mail_Address: joyce.miller@noaa.gov

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.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<http://www.soest.hawaii.edu/pibhmc/pibhmc_pria_howland_bathy.htm#40meter>

Fees: None

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: netCDF

Format_Information_Content:

Binary netCDF Grid: This file is formatted as a 2-D binary netCDF grid file. This is the default grid file format used by GMT (Generic Mapping Tools), which created this file. More information can be located at <http://gmt.soest.hawaii.edu> and <http://unidata.ucar.edu/packages/netcdf/index.html> and in <http://www.ldeo.columbia.edu/res/pi/MB-System/formatdoc/gsf_spec.pdf>

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<http://www.soest.hawaii.edu/pibhmc/pibhmc_pria_howland_bathy.htm#40meter>

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20080812

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

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

Contact_Person: Joyce E. Miller

Contact_Position: Oceanographer

Contact_Address:

Address_Type: mailing and physical address

Address: 1680 East-West Road POST 833

City: Honolulu

State_or_Province: Hawaii

Postal_Code: 96822

Country: USA

Contact_Voice_Telephone: 808-956-5239

Contact_Electronic_Mail_Address: joyce.miller@noaa.gov

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998