Skip to main content
U.S. flag

An official website of the United States government

EM300 Multibeam Sonar Data collected from January 26 to April 22 from NOAA Ship Hi'ialakai cruise HA-15-01 to the Pacific Remote Island Areas and American Samoa in 2015

Published by Pacific Islands Fisheries Science Center | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 02, 2026 at 11:23 PM | Dataset Last Updated: January 01, 2018 at 12:00 AM
Multibeam data were collected using a Simrad EM300 30-kHz sonar aboard NOAA Ship Hi'ialakai, a 68-m (218') NOAA research vessel, from January 26 to April 22, 2015 during cruise HA-15-01. Multibeam data were acquired at Johnston, Howland, Baker, Jarvis, and Palmyra in the Pacific Remote Island Areas, and Swains and Tutuila in American Samoa. The multibeam data were collected using Kongsberg SIS software in the *.all format and processed using SABER and QPS Qimera editing software. Surface sound velocity values were supplied by Seabird SBE-45 MicroTSG and a SBE-38, and motion corrections from a TSS/Applanix POS MV (Model 320 Version 4) vertical reference were applied to the data in real time. WGS84 datum. The vessel is equipped with a sound velocity profiler; however, no casts were acquired during mapping operations. Attempts were made to improve vertical fit of the EM300 data by using sound velocity profile data from other sources (data from previous cruises, and synthetic data derived from World Ocean Atlas using velocipy); however, these alternatives were not effective. Resulting vertical discrepancies with pre-existing surfaces are ±10m; however, the EM300 data cover deep depths (up to 4800m) and therefore these errors were considered acceptable. The EM300 data only covered new terrain around Howland and Baker islands, and therefore only the data for these areas have been processed. Depths mapped range from ~50 m to 4800 m. These data are not to be used for navigation.

Resources

3 resources available

Find Related Datasets

Search by Tags

Click any tag below to search for similar datasets

Geographic Information > Bathymetry EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs BATHYMETRY Geophysical

Complete Metadata
@type dcat:Dataset
accessLevel non-public
contactPoint 
{
  "fn": "Akridge, Michael W",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:michael.akridge@noaa.gov"
}
describedByType application/octet-steam
description Multibeam data were collected using a Simrad EM300 30-kHz sonar aboard NOAA Ship Hi'ialakai, a 68-m (218') NOAA research vessel, from January 26 to April 22, 2015 during cruise HA-15-01. Multibeam data were acquired at Johnston, Howland, Baker, Jarvis, and Palmyra in the Pacific Remote Island Areas, and Swains and Tutuila in American Samoa. The multibeam data were collected using Kongsberg SIS software in the *.all format and processed using SABER and QPS Qimera editing software. Surface sound velocity values were supplied by Seabird SBE-45 MicroTSG and a SBE-38, and motion corrections from a TSS/Applanix POS MV (Model 320 Version 4) vertical reference were applied to the data in real time. WGS84 datum. The vessel is equipped with a sound velocity profiler; however, no casts were acquired during mapping operations. Attempts were made to improve vertical fit of the EM300 data by using sound velocity profile data from other sources (data from previous cruises, and synthetic data derived from World Ocean Atlas using velocipy); however, these alternatives were not effective. Resulting vertical discrepancies with pre-existing surfaces are ±10m; however, the EM300 data cover deep depths (up to 4800m) and therefore these errors were considered acceptable. The EM300 data only covered new terrain around Howland and Baker islands, and therefore only the data for these areas have been processed. Depths mapped range from ~50 m to 4800 m. These data are not to be used for navigation.
distribution 
[
  {
    "@type": "dcat:Distribution",
    "title": "Howland_EM300_post_draft_40m_clean.tif",
    "accessURL": "https://www.ngdc.noaa.gov/ships/hi_ialakai/HA1501_mb.html",
    "mediaType": "text/html",
    "description": "Multibeam bathymetry grid for Howland Island, acquired during NOAA Ship Hi'ialakai cruise HA-15-01.

*Data are currently in the process of being archived and will be accessible via NCEI's Bathymetry portal once complete.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "GCMD Keyword Forum Page",
    "accessURL": "https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords",
    "mediaType": "text/html",
    "description": "Global Change Master Directory (GCMD). 2026. GCMD Keywords, Version 24. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Full Metadata Record",
    "accessURL": "https://www.fisheries.noaa.gov/inport/item/47822",
    "mediaType": "text/html",
    "description": "View the complete metadata record on InPort for more information about this dataset.",
    "describedByType": "application/octet-stream"
  }
]
identifier https://data.noaa.gov/waf/NOAA/nmfs/pifsc/iso/xml/47822.xml
issued 2018-01-01T00:00:00.000+00:00
keyword 
[
  "Geographic Information > Bathymetry",
  "EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat",
  "EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat",
  "EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping",
  "EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry",
  "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs",
  "BATHYMETRY",
  "Geophysical",
  "HI'IALAKAI",
  "US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division; Coral Reef Ecosystem Program",
  "COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > American Samoa (14S170W0000)",
  "COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Swains Atoll (11S171W0001)",
  "COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Tutuila Island (14S170W0016)",
  "COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Baker Island (00N176W0001)",
  "COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Howland Island (00S176W0001)",
  "COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Jarvis Island (00S160W0001)",
  "COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Johnston Atoll (16N169W0001)",
  "COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Palmyra Atoll (05N162W0001)",
  "OCEAN BASIN > Pacific Ocean > American Samoa > American Samoa (14S170W0000)",
  "OCEAN BASIN > Pacific Ocean > American Samoa > Swains Atoll (11S171W0001)",
  "OCEAN BASIN > Pacific Ocean > American Samoa > Tutuila Island (14S170W0016)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Baker Island > Baker Island (00N176W0001)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Howland Island > Howland Island (00S176W0001)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Johnston Atoll > Johnston Atoll (16N169W0001)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Line Islands > Jarvis Island (00S160W0001)",
  "OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Line Islands > Palmyra Atoll (05N162W0001)",
  "Equatorial Pacific Ocean",
  "Pacific Remote Islands Marine National Monument",
  "South Pacific Ocean",
  "SEA FLOOR",
  "CRED",
  "CREP",
  "Coral Reef Ecosystem Division",
  "Coral Reef Ecosystem Program",
  "ESD",
  "Ecosystem Sciences Division",
  "Multibeam sonar",
  "PIBHMC",
  "PIFSC",
  "Pacific Islands Benthic Habitat Mapping Center",
  "Pacific Islands Fisheries Science Center",
  "seafloor elevation",
  "PRIA",
  "Pacific Remote Island Areas",
  "DOC/NOAA/NMFS/PIFSC > Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce",
  "Cruise Metadata Catalog for Multibeam Mapping Missions"
]
landingPage https://www.fisheries.noaa.gov/inport/item/47822
language 
[]
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2018-01-01T00:00:00.000+00:00
publisher 
{
  "name": "Pacific Islands Fisheries Science Center",
  "@type": "org:Organization"
}
rights otherRestrictions, unclassified
spatial -176.56212,0.741496,-176.737566,0.867447
temporal 2015-01-26T00:00:00+00:00/2015-04-22T00:00:00+00:00
theme 
[
  "geospatial"
]
title EM300 Multibeam Sonar Data collected from January 26 to April 22 from NOAA Ship Hi'ialakai cruise HA-15-01 to the Pacific Remote Island Areas and American Samoa in 2015

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov