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)
20100101
Gridded bathymetry of Penguin Bank, Hawaii, USA
digital data
http://www.soest.hawaii.edu/pibhmc/pibhmc_mhi_pb_bathy.htm
Gridded bathymetry (5 m cell size) of Penguin Bank, Hawaii, USA.
The netCDF grid and ArcGIS ASCII file include multibeam bathymetry from the Simrad
EM3002d, and Reson 8101 multibeam sonars collected during cruises in 2005 and 2006
by the NOAA Coral Reef Ecosystem Division in depths between 0 and 200 meters.
This netCDF grid and ASCII file 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, a 218' United States
National Oceanographic and Atmospheric Administration research ship. The NOAA Ship
Hiialakai'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 SeaBat 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
HI0504, HI0605, and AHI0605. These metadata can be accessed at:
http://www.soest.hawaii.edu/pibhmc/pibhmc_cruise-catalog.htm
20050715
20060512
ground condition
As needed
-157.830
-157.087
21.2950
20.8391
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
Penguin Bank
Molokai
Hawaii
Main Hawaiian Islands
United States of America
CoRIS Place Thesaurus
COUNTRY/TERRITORY > United States of America > Hawaii > Kalawao > Penguin Bank (21N157W0008)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Penguin Bank > Penguin Bank (21N157W0008)
CoRIS Region
MHI
none
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.
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
1125B Ala Moana Blvd.
Honolulu
HI
96814
(808) 983-3776
(808) 983-2902
pibhmc@soest.hawaii.edu
e-mail preferred
http://www.soest.hawaii.edu/pibhmc/MHI_images/PB_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) and ArcGIS ASCII file, both 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
Range resolution of sonar: varies with depth
Raw sounding resolution: varies with depth
Vertical accuracy of gridded sonar product: ~ 1% of water depth
Vertical accuracy of derived bathymetry product: 5 meter range
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 nearneighbor, a Generic
Mapping Tools (GMT) algorithm that converts X,Y,Z points to a netCDF grid file
format by assigning an average value to each node that has one or more points
within a radius centered on the node. 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. 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.
20091201
Raster
Grid Cell
10243
15332
1
Universal Transverse Mercator
4
.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
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
1125B Ala Moana Blvd.
Honolulu
HI
96814
(808) 983-3776
(808) 983-2902
pibhmc@soest.hawaii.edu
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 and ArcGIS ASCII, .asc
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/pibhmc_mhi_pb_bathy.htm
None
20121217
20100108
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
1125B Ala Moana Blvd.
Honolulu
HI
96814
(808) 983-3776
(808) 983-2902
pibhmc@soest.hawaii.edu
e-mail preferred
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
Universal Time
None
None
20100108034039
None
20050715
20060512
http://www.coris.noaa.gov/metadata/records/html/pb_5m.html
4417