Simrad EM300 multibeam backscatter data from portions of the banktop and bank edge environments at Kure Atoll, Hawaii, USA
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Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator:
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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: 20071101
- Title:
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Simrad EM300 multibeam backscatter data from portions of the banktop and bank edge environments at Kure Atoll, Hawaii, USA
- Geospatial_Data_Presentation_Form: digital data
- Online_Linkage: http://www.soest.hawaii.edu/pibhmc/
- Description:
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- Abstract:
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Multibeam backscatter imagery extracted from gridded
bathymetry of Kure Atoll, Northwestern Hawaiian Islands, USA.
These data provide coverage between 0 and 2000 meters. The
backscatter dataset includes data collected using the Simrad
EM300 multibeam sonar. The sonars frequency is 30 kHz. These
metadata are for the 5 m grid cell size Simrad em300 multibeam
backscatter data only.
- Purpose:
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The GeoTIFFs and netCDF grids of backscatter imagery 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, and for studying geologic features of the area. Refer
to supplemental information for description of instrument and
survey.
- Supplemental_Information:
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Multibeam data were collected aboard the NOAA Ship Hi'ialakai, a
218' United States National Oceanographic and Atmospheric
Administration 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. Specific equipment
configurations are documented in metadata from cruises: HI0609.
These metadata can be accessed at:
http://www.soest.hawaii.edu/pibhmc/cms/cruise-catalog/.
- Time_Period_of_Content:
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- Time_Period_Information:
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- Range_of_Dates/Times:
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- Beginning_Date: 20000623
- Ending_Date: 20060720
- Currentness_Reference: ground condition
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: As needed
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -178.465
- East_Bounding_Coordinate: -178.110
- North_Bounding_Coordinate: 28.620
- South_Bounding_Coordinate: 28.230
- Keywords:
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- Theme:
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- Theme_Keyword_Thesaurus: NCEI Geoportal Filter
- Theme_Keyword: CoRIS_Metadata
- Theme:
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- Theme_Keyword_Thesaurus: CRCP Project
- Theme_Keyword:
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Benthic Habitat Mapping and Characterization - Northwestern and Main Hawaiian Islands
- Theme_Keyword: 1217
- Theme:
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- Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
- Theme_Keyword:
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EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Backscatter
- Theme:
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- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: environment
- Theme_Keyword: 007
- Theme:
-
- Theme_Keyword_Thesaurus: None
- Theme_Keyword: Backscatter
- Theme_Keyword: Multibeam Backscatter
- Theme_Keyword: Acoustic Imagery
- Theme:
-
- Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
- Theme_Keyword: Geographic Information > Backscatter
- Place:
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- Place_Keyword_Thesaurus: None
- Place_Keyword: Kure Atoll
- Place_Keyword: Hawaii
- Place_Keyword: Northwestern Hawaiian Islands
- Place_Keyword: United States of America
- Place:
-
- Place_Keyword_Thesaurus: CoRIS Place Thesaurus
- Place_Keyword:
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OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Kure Atoll (28N178W0001)
- Place_Keyword:
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COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Kure Atoll (28N178W0001)
- Place:
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- Place_Keyword_Thesaurus: CoRIS Region
- Place_Keyword: NWHI
- Access_Constraints: None
- Use_Constraints:
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These data are not to be used for navigation purposes. Please acknowledge NOAA and the Joint Institute for
Marine and Atmospheric Research (JIMAR) 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_Person: Frances Lichowski
- 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: http://www.soest.hawaii.edu/pibhmc/NWHI_images/kure_bs_440.jpg
- Browse_Graphic_File_Description: Multibeam Backscatter Acoustic Imagery
- Browse_Graphic_File_Type: JPEG
- Browse_Graphic:
-
- Browse_Graphic_File_Name:
-
http://www.soest.hawaii.edu/pibhmc/NWHI_images/Kure-em300-bs-boxes_440.jpg
- Browse_Graphic_File_Description: Multibeam Backscatter Acoustic Imagery
- Browse_Graphic_File_Type: JPEG
- Data_Set_Credit: PIBHMC, CRED, PIFSC, NOAA and JIMAR
- Security_Information:
-
- Security_Classification_System: Not applicable
- Security_Classification: Unclassified
- Security_Handling_Description: Not applicable
- Native_Data_Set_Environment:
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GeoTIFF and netCDF grid file created
using HMRG software in a LINUX environment
- Data_Quality_Information:
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report:
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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:
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- Horizontal_Positional_Accuracy:
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- Horizontal_Positional_Accuracy_Report:
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Horizontal positioning system: GPS (SPS)
Horizontal position accuracy: 25 meters
- Vertical_Positional_Accuracy:
-
- Vertical_Positional_Accuracy_Report:
-
1 m
Range resolution of sonar ~1.25 cm
Raw sounding resolution: Variable
Vertical accuracy of gridded product: 1% of water depth
- Lineage:
-
- Process_Step:
-
- Process_Description:
-
Science Applications International Corporation's (SAIC) ISS-2000
acquires, processes and records data, provides survey control and underway quality control displays. SAIC's SABER
processing software is used to process the raw soundings,
analyzethe results, manually edit the sounding data to remove
outliersand derive average gridded data values. Additional
dataacquisition and processing information can be found in the
metadata for cruises HI0609 Hawaii Mapping Research Group (HMRG)
processing software was then used to extract values of
acousticintensity from the soundings. HMRG is an organization of
scientists, engineers and technicians whose mission is to
design, build, and operate tools for mapping the seafloor. HMRG
is agroup within the School of Ocean and Earth Science and
Technology at the University of Hawaii at Manoa. The gsf2bs
program (July,2005) converts the swath bathymetry ping records
contained withina GSF (Generic Sensor Format) version 2.02
dataset into bs fileformat. This is done as follows: (i)
position each beam's bottom detect intensity sample at the
across-track location of that beam's bathymetry value; (ii)
assuming a flat bottom in the near neighborhood of the beam,
compute across-track distances for allof the beam's remaining
intensity samples based on their temporal relation to the bottom
detect sample and the computed average sound velocity for that
beam as derived from its range and traveltime; (iii) after all
of the intensity samples from all beams of a ping have been
located in across-track distance, fill the gaps between them as
necessary by comparing travel times of beams adjacent to the
gap, assigning the position using the adjacent sample closest to
nadir, and averaging the interpolated values that fall within a
cell. The conversion described above is necessary in order to
run HMRG backscatter processing operations on the data, such as
filtering to remove noise, and to create netCDF grids, raster
images and GeoTIFF's. For more information on the backscatter
processing technique see
<http://www.soest.hawaii.edu/pibhmc/pibhmc_documentation.htm>.
Software_Used:
SAIC ISS-2000 Acquisition Software, v 3.4
SAIC SABER Processing Software, v 3.3.15
Hawaii Mapping Research Group (HMRG) Processing Software
GMT Generic Mapping Tools, v 4.1
MB System, v 5.0.7
- Process_Date: 20070818
- Spatial_Data_Organization_Information:
-
- Direct_Spatial_Reference_Method: Raster
- Raster_Object_Information:
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- Raster_Object_Type: Grid Cell
- Row_Count: 8370
- Column_Count: 6863
- Vertical_Count: 1
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
-
- Planar:
-
- Grid_Coordinate_System:
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- 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: 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:
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- 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:
-
Sidescan data within a GSF file are arranged as small sequences
of intensity values, one sequence per beam per ping. The
intensity values represent the amplitude of echo returns to the
sensor and can be related to seabed roughness.
- 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_Person: Frances Lichowski
- 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: GeoTIFF, .tif
- Format_Information_Content:
-
TIFF is a format for storage, transfer, display, and printing of
raster images. The TIFF file structure allows both the tag and
the image data to be encoded into the same file. GeoTIFF refers
to a TIFF file that has geographic data embedded as tags within
the TIFF file. The geographic data can be used to position the
image in the correct location and geometry on the screen of a
geographic information display. Any GIS, CAD, Image Processing,
Desktop Mapping and other types of systems using geographic
images can read any GeoTiff file. More specifically, files of
this type can be added to ArcInfo and ArcView 8.x or higher and
may be viewed in the Table of Contents as a new raster layer.
Image visualization software that does not use geography as a
basis for image placement can view a GeoTIFF image as if there
were no geographic information in the TIFF file. For example,
GeoTIFF files can be viewed using Windows Picture and Fax
viewer.The GeoTIFF format is public domain, non-proprietary.
- Digital_Transfer_Option:
-
- Online_Option:
-
- Computer_Contact_Information:
-
- Network_Address:
-
- Network_Resource_Name:
-
http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/northwest-hawaiian-islands/kure-atoll/backscatter/
- Digital_Form:
-
- Digital_Transfer_Information:
-
- Format_Name: netCDF, .grd
- Format_Information_Content:
-
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). The file was created by the HMRG sofware program bsovl.
More information about netCDF files can be found at at
http://www.soest.hawaii.edu/gmt/ and
http://www.unidata.ucar.edu/software/netcdf/.
List of Kure Atoll Simrad EM300 backscatter netCDF files and
bounding coordinates
Kure-em300-25-01.05.00m.ss
W/E/S/N -178.463/-178.252/28.230/28.458
Kure-em300-25-02.05.00m.ss
W/E/S/N -178.463/-178.252/28.40/28.62
Kure-em300-25-03.05.00m.ss
W/E/S/N -178.323/-178.112/28.40/28.618
Kure-em300-25-04.05.00m.ss
W/E/S/N -178.323/-178.112/28.234/28.458
- File_Decompression_Technique: none
- Digital_Transfer_Option:
-
- Online_Option:
-
- Computer_Contact_Information:
-
- Network_Address:
-
- Network_Resource_Name: http://www.soest.hawaii.edu/pibhmc
- Fees: None
- Metadata_Reference_Information:
-
- Metadata_Date: 20200329
- Metadata_Review_Date: 20091201
- 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_Person: Frances Lichowski
- 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
- 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_ID: 20091201070644
- CoRIS_Children: None
- CoRIS_Beginning_Date: 20000623
- CoRIS_Ending_Date: 20060720
- CoRIS_Metadata_Link:
-
https://www.coris.noaa.gov/metadata/records/html/kure_em300_bs_5m.html
- CoRIS_Tracking_ID: 4348
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