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
Bathymetric Position Index (BPI) Zones 5 m grid derived from gridded
bathymetry of Ofu and Olosega Islands, Territory of American Samoa, USA.
raster digital data
http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_ofu_geomorph.htm
BPI Zones are derived from a focal mean analysis on
bathymetry and slope. The grid is based on gridded (5 m cell size)
multibeam bathymetry, collected aboard R/V AHI, merged with seafloor
depths derived from multispectral IKONOS satellite imagery. BPI Structures
was was created using the Benthic Terrain Modeler
(http://www.csc.noaa.gov/products/btm/). Cell values
represent one of 4 classes (crest, depression, flat, slope) in an
index of seafloor terrains. This data set is for Ofu and Olosega Islands
of the Manu'a Island group, American Samoa.
The data were derived in support of NOAA Coral Reef Conservation
Program goals. Goal 1 is to map all U.S. Coral Reef Ecosystems.
This data set specifically addresses Objective 1 and 4: to develop
high-resolution benthic maps and to characterize priority deep
water reefs and associated habitats. This derivative of
bathymetry provides a GIS layer that may be used for benthic and
essential fish habitat characterization, and for the study of
geologic features. By combining the dataset with bathymetry,
backscatter, other derivatives, and in situ data, they
collectively compose benthic habitat maps which are designed to
be used to understand and predict moderate depth (~20m - 150m)
benthic habitats for different organisms that inhabit coral
reef ecosystems.
Gridded bathymetry 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 and derived from multispectral IKONOS satellite
imagery. The metadata for the bathymetry is documented in
the product metadata, oo_dbmb_mos4.asc.
References:
Lundblad et al., 2006, A benthic terrain classification scheme for
American Samoa, Marine Geodesy, 29(2):89 - 111.
http://www.csc.noaa.gov/products/btm/
20060430
20080531
ground condition
As needed
-169.705274
-169.583687
-14.133505
-14.203385
NCEI Geoportal FilterCoRIS_Metadata
CRCP Project
Benthic Habitat Mapping and Characterization in the Pacific Islands Region
467
CoRIS Discovery Thesaurus
Geographic Information > Habitats
CoRIS Theme Thesaurus
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetric Position Index Zones
None
Bathymetric Position Index Structures
Bathymetry
Multibeam sonar
ISO 19115 Topic Category
imageryBaseMapsEarthCover
010
None
Ofu Island
Olosega Island
American Samoa
United States of America
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 Pacific Islands Fisheries
Science Center (PIFSC) Coral Reef Ecosystem Division (CRED) and
the Pacific Islands Benthic Habitat Mapping Center, and the Joint
Institute for Marine and Atmospheric Research (JIMAR) and School
of Ocean and Earth Science and Technology (SOEST), University of
Hawaii as the sources of this information.
http://www.soest.hawaii.edu/pibhmc/amsamoa_images/OfuOlo_5m_BPIZones_445.jpg
Gridded Bathymetry Derivative
JPEG
NOAA PIFSC CRED PIBHMC, JIMAR, and SOEST
Not applicable
Unclassified
Not applicable
ArcGIS ASCII file, derived from bathymetry and
slope in ArcGIS 9.3 (Spatial Analyst and Benthic Terrain Modeler)
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
Bathymetric Position Index Zones were derived from the gridded
multibeam bathymetry (OO_dbmb_mos4) using the Benthic Terrain
Modeler (BTM). The BTM (written for ArcGIS 8.x or 9.x) may be downloaded from
http://dusk2.geo.orst.edu/djl/samoa/tools.html. BPI Zones are derived
from a focal mean analysis on bathymetry and slope. After testing 5
experimental scales, the bpi with scalefactor 250 was chosen
based on the diameter of reef structures seen in
the bathymetry (also after Lundblad et al. 2006; see
Supplemental_Information). Two ranges of slope defined flats
and slopes: x < 5 and 5 < x < 70. There may be edge effects on both landward and
seaward sides.
20100420
Raster
Grid Cell
2617
1532
1
Universal Transverse Mercator
2
0.9996
-171
0
500000
10000000
Row and Column
5
5
meters
D_WGS_1984
WGS_1984
6378137.000000
298.257224
none
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.
Arc ASCII
Arc ASCII can be converted to Arc
Raster using ArcToolbox Conversion Tools (ASCIItoRaster).
http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_ofu_geomorph.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
20100504115134
None
20060430
20080531
https://www.coris.noaa.gov/metadata/records/html/ofuolo_5m_bpizones.html
4902