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)
20091230
Gridded bathymetry of Niihau Island, Hawaii, USA
digital data
http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/main-hawaiian-islands/nihau/bathymetry/
Gridded bathymetry shelf, bank and slope environments of
Ni'ihau Island. This 5 m grid contains data between 0 and 100 meters.
The netCDF and Arc ASCII grids include multibeam
bathymetry from the Simrad EM300 and Reson 8101 multibeam sonars
collected as of December 2009 by the NOAA Coral Reef Ecosystem
Division. The sonar frequencies are 30 and 240 kHz respectively.
These netCDF and ASCII 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, and for studying
geologic features of the area. Refer to supplemental information
for description of instrument and survey.
Multibeam data were collected aboard the NOAA Ship Hi'ialakai,
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.
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 cruise metadata from the following cruises:
HI0504. These metadata can be accessed at:
http://www.soest.hawaii.edu/pibhmc/cms/cruise-catalog/
20050613
20050708
ground condition
As needed
-160.282350
-160.024013
22.056460
21.735042
NCEI Geoportal FilterCoRIS_Metadata
CRCP Project
Benthic Habitat Mapping and Characterization - Northwestern and Main Hawaiian Islands
1217
CoRIS Theme Thesaurus
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
CoRIS Discovery Thesaurus
Geographic Information > Bathymetry
None
Bathymetry
Multibeam sonar
ISO 19115 Topic Category
elevation
006
None
Ni'ihau Island
Hawaii
Northwestern Hawaiian Islands
United States of America
CoRIS Place Thesaurus
COUNTRY/TERRITORY > United States of America > Hawaii > Kauai > Niihau Island (21N160W0001)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Niihau Island > Niihau Island (21N160W0001)
CoRIS Region
MHI
none
These data are not to be used for navigation purposes. Please acknowledge NOAA Pacific Islands Fisheries
Science Center, and the Joint Institute for Marine and
Atmospheric Research (JIMAR) 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)
Frances Lichowski
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/MHI_images/NII_5m_440.jpg
Multibeam Bathymetry
JPEG
PIBHMC, CRED, PIFSC, NOAA and JIMAR
Not applicable
Unclassified
Not applicable
netCDF file created using the Generic
Mapping Tools (GMT) in a LINUX environment
and ArcGIS ASCII file created 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 around the island and
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
with a defined grid cell size (5 m) in SABER and area based
editing is performed. The edited PFM is then exported as X,Y,Z
data with a value at each grid node. The X,Y,Z data are then
gridded using nearneighbor, a Generic Mapping Tools (GMT)
algorithm that converts an ASCII or binary table to a netCDF grid
file format. NetCDF grids are then converted to an ArcGIS ASCII
file format using LINUX/UNIX commands in combination with GMT.
GMT is an open source collection of tools for manipulating
geographic data sets. Additional information about GMT can be
found at: http://www.soest.hawaii.edu/gmt and additional
information about the multibeam data processing is recorded in the
cruise metadata.
20051208
Raster
Grid Cell
7077
5285
1
Universal Transverse Mercator
4
0.9996
-159
0
500000
0
Row and Column
5
5
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 these data have 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)
Frances Lichowski
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 or Arc ASCII
These data can be downloaded as either a 2-D binary netCDF raster
grid or an ArcGIS ASCII text file. The netCDF grid
is the default grid file format used by GMT (Generic Mapping
Tools), which created this file. More information can be located
at http://www.soest.hawaii.edu/gmt/and
http://www.unidata.ucar.edu/software/netcdf/. The Arc ASCII file,
for use in ESRI's (http://www.esri.com) GIS software, can be
converted to an Arc Raster Grid using ArcToolbox ASCII to Raster
conversion tool.
http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/main-hawaiian-islands/nihau/bathymetry/
None
20190605
20100831
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)
Frances Lichowski
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
20100108032837
None
20050613
20050708
https://www.coris.noaa.gov/metadata/records/html/niihau_5m.html
4415