Short Citation:
Pacific Islands Fisheries Science Center, 2021: Gridded multibeam bathymetry of Howland Island, Pacific Remote Island Areas, Central Pacific, https://www.fisheries.noaa.gov/inport/item/47761.

Item Identification

Title: Gridded multibeam bathymetry of Howland Island, Pacific Remote Island Areas, Central Pacific
Short Name: Multibeam: PRIA, Howland 40m
Status: Completed
Publication Date: 2017-11-01
Abstract:

Gridded bathymetry at 40m resolution surrounding Howland Island, within the Pacific Remote Island Areas - Central Pacific Ocean. Bottom coverage was achieved in depths between 8 and 3800 meters. The Arc ASCII grids and floating point geotifs include multibeam bathymetry data acquired over multiple surveys by the NOAA Ecosystem Sciences Division (as of April 2015). The data were acquired using the Simrad EM300, EM3002D, and Reson 8101 multibeam sonars, with sonar frequencies of 30, 300, and 240 kHz respectively.

Purpose:

These ASCII and floating point grids were created using data gathered from multibeam soundings for use as a planning and reference document. The data are also being used for benthic habitat mapping, for locating Essential Fish Habitat (as defined by NOAA Fisheries), and for studying geologic features of the area. Refer to supplemental information for description of instrument and survey.

Supplemental Information:

Multibeam data were collected aboard the NOAA Ship Hi'ialakai, a 218' NOAA research ship. The NOAA Ship Hi'ialakai'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.

Multibeam 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.

Specific equipment configurations are documented in metadata from cruises HI-06-01, AHI-06-01, and HA-15-01. These metadata can be accessed at: http://www.soest.hawaii.edu/pibhmc/cms/cruise-catalog/.

Keywords

Theme Keywords

Thesaurus Keyword
UNCONTROLLED
CoRIS Discovery Thesaurus Geographic Information > Bathymetry
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs
CRCP Project 1084
CRCP Project Benthic Habitat Mapping and Characterization - American Samoa and PRIA
ISO 19115 Topic Category 006
ISO 19115 Topic Category elevation
NODC DATA TYPES THESAURUS BATHYMETRY
NODC DATA TYPES THESAURUS water depth
NODC OBSERVATION TYPES THESAURUS GIS product
NODC PLATFORM NAMES THESAURUS HI'IALAKAI
NODC PROJECT NAMES THESAURUS Coral Reef Conservation Program
NODC SUBMITTING INSTITUTION NAMES THESAURUS US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division; Coral Reef Ecosystem Program
None Coral Reef Ecosystem Division
None Coral Reef Ecosystem Program
None CRED
None CREP
None Ecosystem Sciences Division
None ESD
None Multibeam
None Pacific Islands Benthic Habitat Mapping Center
None Pacific Islands Fisheries Science Center
None PIBHMC
None PIFSC
None seafloor elevation

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Howland Island (00S176W0001)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Howland Island > Howland Island (00S176W0001)
CoRIS Region PRIA
NODC SEA AREA NAMES THESAURUS Equatorial Pacific Ocean
NODC SEA AREA NAMES THESAURUS Pacific Remote Islands Marine National Monument
None Pacific Remote Island Areas
None PRIA
None PRIMNM

Stratum Keywords

Thesaurus Keyword
UNCONTROLLED
Global Change Master Directory SEA FLOOR

Physical Location

Organization: Pacific Islands Fisheries Science Center
City: Honolulu
State/Province: HI
Country: USA

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: GIS dataset of raster files
Maintenance Frequency: As Needed
Data Presentation Form: Map (digital)
Entity 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 >1000 soundings in shallow depths to as few as 20 soundings in deeper areas. A total error budget for these data have not been developed. Therefore, the accuracy of depth measurements should be considered to be within 1 meter.

Entity Attribute Detail Citation:

none

Distribution Liability:

TWhile every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Data Set Credit: PIFSC Ecosystem Sciences Division

Support Roles

Data Set Credit

CC ID: 655176
Date Effective From: 2006
Date Effective To:
Contact (Organization): NOAA Coral Reef Conservation Program (CRCP) (CRCP)
Address: 1305 East West Highway 10th Floor
Silver Spring, MD 20910-3281
Phone: (301) 713-3155
URL: http://coralreef.noaa.gov

Data Steward

CC ID: 655177
Date Effective From: 2006
Date Effective To:
Contact (Person): Lichowski, Frances
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: frances.lichowski@noaa.gov
Phone: (808)725-5476

Distributor

CC ID: 655178
Date Effective From: 2008
Date Effective To:
Contact (Person): Akridge, Michael W
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: michael.akridge@noaa.gov
Phone: (808)725-5483

Metadata Contact

CC ID: 655179
Date Effective From: 2010
Date Effective To:
Contact (Person): DesRochers, Annette M
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: annette.desrochers@noaa.gov
Phone: (808)725-5461
Business Hours: 8 am - 5 pm

Originator

CC ID: 655180
Date Effective From: 2006
Date Effective To:
Contact (Organization): Pacific Islands Fisheries Science Center (PIFSC)
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Phone: 808-725-5300
URL: http://www.pifsc.noaa.gov
Business Hours: 8:00 a.m. - 4:30 p.m.

Point of Contact

CC ID: 655181
Date Effective From: 2016
Date Effective To:
Contact (Person): DesRochers, Annette M
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: annette.desrochers@noaa.gov
Phone: (808)725-5461
Business Hours: 8 am - 5 pm

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Description:

Extent of area mapped around the island of Howland between ~8 and ~3800 m.

Extent Group 1 / Geographic Area 1

CC ID: 596985
W° Bound: -176.737566
E° Bound: -176.56212
N° Bound: 0.867447
S° Bound: 0.741496

Extent Group 1 / Time Frame 1

CC ID: 655182
Time Frame Type: Discrete
Start: 2015
Description:

Bathymetry collected in 2015 aboard the NOAA Ship Hi'ialakai

Extent Group 1 / Time Frame 2

CC ID: 596984
Time Frame Type: Discrete
Start: 2006
Description:

Bathymetry collected in 2006 aboard the NOAA Ship Hi'ialakai and R/V AHI

Access Information

Security Class: Unclassified
Security Classification System:

Not applicable

Security Handling Description:

Not applicable

Data Access Policy:

NOAA Coral Reef Ecosystem Program (CREP) Data Sharing Recommendations, version 9.0 updated August 12, 2015:

CREP welcomes the opportunity to collaborate on research issues contributing to the scientific basis for better management of marine ecosystems. CREP has a very diverse set of field activities that generates large volumes of data using an array of data collection protocols.

The following recommendations are for your consideration as you use this data:

1) Data analyses should take all field exigencies into account. The most effective way to do this would be active collaboration with CREP principal investigators.

2) In all presentations, product releases, or publications using data generated by CREP, proper acknowledgement of both CREP and the individuals responsible for data collection is expected. Citing the DOI (if available) is preferred, a non-DOI example is listed below.

3) If you collect or generate data for the same study areas, CREP requests that you share relevant information on complimentary data collections.

4) Those receiving data are strongly urged to inform the CREP Data Management Team of any errors and discrepancies that are discovered during the course of using these data. They are further urged to bring to the attention of the Team all problems and difficulties encountered in using these data. This information is necessary in order to improve the collections and to facilitate more efficient and economical data processing and retrieval. The users are asked to supply copies of any missing data that may be located, and to provide information as to significant subsets and special aggregations of data that are developed in using the material provided.

Example citation:

"This publication makes use of data products provided by the Ecosystem Sciences Division, Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), with funding support from the NOAA Coral Reef Conservation Program (CRCP) and the Pacific Islands Deep Sea Coral and Sponge Initiative. The analysis and interpretations presented here are solely that of the current authors.”

Data Access Procedure:

Data can be accessed online via the Pacific Islands Benthic Habitat Mapping Center website at http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/pacific-remote-island-area/howland-island/howland-island-bathymetry/.

Data Access Constraints:

none

Data Use Constraints:

These data are not to be used for navigation purposes.

Please cite NOAA Ecosystem Sciences Division (ESD) when using the data.

Suggested citation:

Ecosystem Sciences Division; Pacific Islands Fisheries Science Center (2017). Gridded multibeam bathymetry of Howland Island, Pacific Remote Island Areas, Central Pacific. https://www.fisheries.noaa.gov/inport/item/47761

Metadata Access Constraints:

None

Metadata Use Constraints:

None

Distribution Information

Distribution 1

CC ID: 596991
Download URL: ftp://ftp.soest.hawaii.edu/pibhmc/website/data/pria/bathymetry/Howland_40m.asc.zip
Distributor: Michael W Akridge (2008 - Present)
File Name: Howland_40m.asc.zip
Description:

Zip file containing 40-m bathymetry grid in Arc ASCII and Floating Pt. Geotif format for Howland Island, Pacific Remote Island Areas, Central Pacific.

File Type: Zip

URLs

URL 1

CC ID: 596992
URL: http://www.soest.hawaii.edu/pibhmc
Name: Pacific Islands Benthic Habitat Mapping Center website
URL Type:
Online Resource

URL 2

CC ID: 596993
URL: http://www.soest.hawaii.edu/pibhmc/PRIAs_images/Howland_40m_445.jpg
Name: Multibeam Bathymetry for Howland
URL Type:
Browse Graphic
Multibeam Bathymetry for Howland
File Resource Format: JPEG

URL 3

CC ID: 655183
URL: https://www.fisheries.noaa.gov/pacific-islands/ecosystems/surveying-vast-pacific-ocean
Name: NOAA Fisheries in the Pacific
URL Type:
Online Resource
Description:

Surveying the Vast Pacific Ocean - Ecosystem Sciences in the Pacific

Technical Environment

Description:

ArcGIS ASCII and Floating Pt. geotif files both created using a number of processes in QPS Fledermaus and Quimera, as well as ESRI ArcGIS; Windows operating system.

Data Quality

Accuracy:

Relevant offset, sound velocity, and tidal corrections are applied to the data as part of the processing procedures.

Completeness Report:

Data collected in 2015 were only used to gap fill the existing 40m bathymetry grid from data previously collected in 2006.

Conceptual Consistency:

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

Quality Control Procedures Employed:

New data collected in 2015 were evaluated against pre-existing data before the data were deemed usable and appended to the pre-existing grids.

Data Management

Have Resources for Management of these Data Been Identified?: Yes
Approximate Percentage of Budget for these Data Devoted to Data Management: Unknown
Do these Data Comply with the Data Access Directive?: Yes
Is Access to the Data Limited Based on an Approved Waiver?: No
Approximate Delay Between Data Collection and Dissemination: Unknown
Actual or Planned Long-Term Data Archive Location: No Archiving Intended
If To Be Determined, Unable to Archive, or No Archiving Intended, Explain:

Source data are archived and available through NOAA. Gridded multibeam bathymetry data products are accessible via the Pacific Islands Benthic Habitat Mapping Center website.

Approximate Delay Between Data Collection and Archiving: Unknown
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

University of Hawaii School of Ocean and Earth Science and Technology, NOAA IRC and NOAA Fisheries ITS resources and assets.

Lineage

Lineage Statement:

Process to produce bathymetry grid from source multibeam bathymetry data.

Sources

Cruise Metadata: AHI-06-01

CC ID: 596998
Citation URL: ftp://ftp.soest.hawaii.edu/pibhmc/website/cruisecatalog/cred_ahi0601_mb_metadata.txt

Cruise Metadata: HA-15-01

CC ID: 596999
Contact Role Type: Originator
Contact Type: Organization
Contact Name: Pacific Islands Fisheries Science Center
Extent Type: Discrete
Extent Start Date/Time: 2015
Citation URL: https://www.fisheries.noaa.gov/inport/item/47822
Citation URL Name: NOAA Fisheries InPort
Citation URL Description:

Enterprise Data Management Tool

Source Contribution:

Source bathymetry data collected in 2015

Cruise Metadata: HI-06-01

CC ID: 597000
Citation URL: ftp://ftp.soest.hawaii.edu/pibhmc/website/cruisecatalog/cred_hi0601_mb_metadata.txt

Process Steps

Process Step 1

CC ID: 597001
Description:

As multibeam bathymetry data contributing to grid were acquired over multiple surveys/years, there have been different methods employed to process the data. Generally speaking, data acquired prior to 2015 were treated according to protocol #1, whereas data acquired after 2015 were processed using protocol #2.

Protocol 1: Multibeam swath files are acquired in the Generic Sensor Format (GSF) and are edited on a swath by swath basis using SAIC's SABER editing software. The edited swath files are then combined into a Pure File Magic (PFM) format in SABER and area based editing is performed. The edited PFM is then exported as X,Y,Z. The resulting X,Y,Z data are then gridded using xyz2grd, a Generic Mapping Tools (GMT) algorithm that converts an ASCII or binary table to a netCDF grid file format. GMT is an open source collection of tools for manipulating geographic data sets. Grid nodes with more than one value are set to the average value and unconstrained nodes are set to NaN. Finally, the netCDF grid is clipped at a depth that minimizes data gaps for the specified grid cell size and then converted to an ArcGIS ASCII file format using LINUX/UNIX commands in combination with GMT.

Protocol 2: Multibeam bathymetry data were acquired in Kongsberg *.all format, and imported into SABER editing software as converted *gsf. Within SABER, relevant offset, sound velocity, and tidal corrections are made prior to exporting *gsf files to QPS Quimera for swath editing. Within Quimera *gsf files are combined to form 60m resolution 'Dynamic Surface'. A medium-tension spline filter is applied to the data, and the Dynamic Surface is progressively corrected as final 2D and 3D direct swath edits are made. The final cleaned surface is exported as a floating point geotif, where in ArcGIS it is merged with the pre-existing 60m resolution grid using the 'Mosaic to new Raster' function. This final combined grid is exported as both ArcGIS ASCII grid and a floating point raster grid.

Further information about the multibeam data processing is recorded in the cruise metadata.

Process Date/Time: 2017-09-10 00:00:00

Catalog Details

Catalog Item ID: 47761
Metadata Record Created By: Dayton W Dove
Metadata Record Created: 2017-11-02 23:31+0000
Metadata Record Last Modified By: Annette M DesRochers
Metadata Record Last Modified: 2020-12-03 19:39+0000
Metadata Record Published: 2017-11-14
Owner Org: PIFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2018-11-15