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)
20100428
Gridded bathymetry of the banktop and slope environments of Ofu and
Olosega Islands of the Manu'a Island group, American Samoa (NetCDF Format)
raster digital data
http://www.soest.hawaii.edu/pibhmc
Gridded bathymetry of the banktop and slope environments of Ofu
and Olosega Islands of the Manu'a Island group, American Samoa. This
survey provides almost complete coverage between 20 and 250 meters.
The multibeam data are from Reson 8101ER system aboard the R/V AHI and were
collected during Jan. to March of 2004.
The data were collected in support of Coral Reef Conservation Program goals
to map all shallow (0-30 m) coral reefs in US Pacific waters and priority
moderate (> 30 m) depth areas by 2009. The data are being used to provide
bathymetric and backscatter data for previously unmapped areas; in support
of ecosystem management requirements for benthic habitat mapping and
location of Essential Fish Habitat; and to study the geologic features of
the area.
Data were 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. Sensor configuration for the AHI for cruise
AHI0402 is documented in the cruise/multibeam metadata file
AHI0402_MB_Metadata.txt.
20040205
20040212
ground condition
As needed
-169.705274
-169.583687
-14.133505
-14.203385
NCEI Geoportal FilterCoRIS_Metadata
CRCP Project
Benthic Habitat Mapping and Characterization - American Samoa and PRIA
1084
None
Gridded bathymetry
ISO 19115 Topic Category
elevation
006
CoRIS Discovery Thesaurus
Geographic Information > Bathymetry
CoRIS Theme Thesaurus
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
None
Ofu and Olosega Islands
Manu'a Islands
American Samoa
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > Manu'a Group > Ofu Island (14S169W0013)
COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Ofu Island (14S169W0013)
OCEAN BASIN > Pacific Ocean > Manu'a Group > Olosega Island (14S169W0014)
COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Olosega Island (14S169W0014)
CoRIS Region
AmSam
None
These data are not to be used for navigation purposes.
Please acknowledge the NOAA Coral Reef Ecosystem Division,
Pacific Islands Fisheries Science Center as the source 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)
John Rooney
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/amsamoa_images/OfuOlo_5m_445px.jpg
Gridded Bathymetry
JPG
Benthic Habitat Mapping Group, Coral Reef Ecosystem Division
(CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA
Not applicable
Unclassified
Not applicable
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 C/A
Horizontal position accuracy: 25 meters
Range resolution of sonar: varies with depth
Raw sounding resolution: varies with depth
Vertical accuracy of gridded product ~ 1% of water depth
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 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 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.
20100415
Raster
Grid Cell
1531
2616
1
Universal Transverse Mercator
-2
0.9996
-171
0
500000
1000000
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 per cent of water depth.
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)
John Rooney
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
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), which created this file.
More information can be be located at <http://gmt.soest.hawaii.edu> and
<http://unidata.ucar.edu/packages/netcdf/index.html>
Zip file
3.6
http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_ofu_bathy.htm
None
20200329
20100504
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
20100504032657
None
20040205
20040212
https://www.coris.noaa.gov/metadata/records/html/ofuolo_5m_grd.html
4905