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)
20070301
CRED 20 m Gridded bathymetry of Twin Banks, Northwestern Hawaiian Islands, USA (NetCDF format)
digital data
http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/northwest-hawaiian-islands/
Gridded bathymetry (20m) of the shelf and slope environments of Twin
Banks, Hawaii, USA. Bottom coverage was achieved in depths between 61 and
1500 meters. The netCDF grid includes multibeam bathymetry from the Simrad
EM120 and EM1002 multibeam sonars collected as of October 2006 by the NOAA
Coral Reef Ecosystem Division in depths between 20 and 5000 meters.
This netCDF grid was 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.
Data were collected aboard the R/V Kilo Moana, a 186' United States Navy owned
research vessel. The R/V Kilo Moana's survey sensors include a 12 kHz Simrad
EM120 sonar and a 95 kHz Simrad EM1002 sonar, which provide bathymetry and imagery
data, a TSS/Applanix POS/MV Model 320, which measures position, velocity, attitude
and heading, and a Sippican MK-21/PC based XBT system plus a Seabird SBE 9/11 CTD
both of which measured sound velocity profiles.
Specific equipment configurations are documented in metadata from cruises KM0206.
These metadata can be accessed at:
http://www.soest.hawaii.edu/pibhmc/cms/cruise-catalog/
20021022
20021116
ground condition
As needed
-163.362604
-162.324269
23.516505
22.703074
NCEI Geoportal FilterCoRIS_Metadata
CRCP Project
Benthic Habitat Mapping and Characterization - Northwestern and Main Hawaiian Islands
1217
CoRIS Discovery Thesaurus
Geographic Information > Bathymetry
ISO 19115 Topic Category
elevation
006
CoRIS Theme Thesaurus
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
None
Bathymetry
Multibeam sonar
None
Twin Banks
Hawaii
Northwestern Hawaiian Islands
United States of America
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Nihoa (23N161W0001)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Necker Island (23N164W0001)
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Necker Island (23N164W0001)
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Nihoa (23N161W0001)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands (28N178W0000)
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Northwestern Hawaiian Islands (28N178W0000)
CoRIS Region
NWHI
None
These data are not to be used for navigation purposes.
Please acknowledge NOAA and the Joint Institute for Marine and Atmospheric Research,
University of Hawaii as the sources of this information.
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)
mailing and physical address
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
e-mail preferred
http://www.soest.hawaii.edu/pibhmc/NWHI_images/Twin_20m_500.jpg
Multibeam Bathymetry
JPG
PIBHMC, CRED, PIFSC, NOAA and JIMAR
Not applicable
Unclassified
Not applicable
netCDF file created using the Generic Mapping Tools
(GMT) in a LINUX environment
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.
These data are believed to be logically consistent
though no tests were performed
Complete
Horizontal positioning system: GPS (SPS)
Horizontal position accuracy: 25 m
1 m
Raw sounding resolution: Variable
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 points with a defined grid cell size. 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. Additional information about GMT can be found
at: www.soest.hawaii.edu/gmt and additional information about the multibeam data
processing is recorded in the cruise metadata.
20061227
Raster
Grid Cell
4373
5189
1
Universal Transverse Mercator
3
0.9996
-165
0
500000
0
Row and Column
20
20
meters
D_WGS_1984
WGS_1984
6378137.000000
298.257224
mean lower low water
0.01
meters
Attribute Values
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
this survey has not been developed. Therefore, the accuracy of depth
measurements should be considered to be within 1 meter.
none
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)
mailing and physical address
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
e-mail preferred
Downloadable Data
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.
netCDF, .grd, .grd
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).
More information can be found at http://www.soest.hawaii.edu/gmt/ and
http://www.unidata.ucar.edu/software/netcdf/.
ftp://ftp.soest.hawaii.edu/pibhmc/website/data/nwhi/bathymetry/Twin_20m.grd.zip
None
20190605
20090220
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)
mailing and physical address
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
e-mail preferred
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
Universal Time
None
None
20090220082919
None
20021022
20021116
https://www.coris.noaa.gov/metadata/records/html/cred_gridded_bathy_twin_nwhi_20m_grd.html
2965