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)
20100701
Bathymetric Position Index (BPI) Zones derived from gridded bathymetry
of Swains Island,Territory of American Samoa, USA
raster digital data
http://www.soest.hawaii.edu/pibhmc
http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_swains_geomorph.htm
BPI Zones are derived from gridded (40 m cell size) multibeam
bathymetry, collected aboard R/V AHI and NOAA ship Hi'ialakai.
BPI Zones was created using the Benthic Terrain Modeler (http://www.csc.noaa.gov/products/btm/).
Cell values represent one of 4 classes (crest, depression, slope, flat) in an index of seafloor terrains.
This data set is for Swains Island, 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 multibeam 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 the 218' NOAA Ship Hi'ialakai. The process for deriving the
gridded (40 m cell size) multibeam data is described in swains_40m.asc.txt.
The resulting grid (swains_40m.grd) was clipped using the ESRI ArcToolbox tool
Extract by Mask' leaving only the multibeam data collected on the slopes
and excluding the discontinuous data forming a box around the island slopes.
This clipped data was used to produce the BPI Zones.
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/
20040210
20060313
ground condition
As needed
-171.167121199383
-170.972693408355
-10.9743890987185
-11.1548581618243
NCEI Geoportal FilterCoRIS_MetadataCRCP ProjectBenthic Habitat Mapping and Characterization - American Samoa and the U.S. Pacific Remote Island Area1084
CoRIS Discovery Thesaurus
Geographic Information > Habitats
ISO 19115 Topic Category
imageryBaseMapsEarthCover
010
CoRIS Theme Thesaurus
EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat > Description
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetric Position Index Zones
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > American Samoa > Swains Atoll (11S171W0001)
COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Swains Atoll (11S171W0001)
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.
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/amsamoa_images/Swains_40m_BPIZones_445.jpg
Gridded Bathymetry Derivative
JPG
NOAA PIFSC CRED and the Pacific Islands Benthic
Habitat Mapping Center, JIMAR and SOEST
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
Bathymetric Position Index Zones were derived from the gridded
multibeam bathymetry (swa_40m_clp) 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
3 different scalefactors, a scalefactor of 800 was chosen as best identifying broad scale
zones for Swains Island while minimizing noise and optimizing possible reef structures (also
after Lundblad et al. 2006; see Supplemental_Information). Two
ranges of slope define flat, and slope: x < 5; and x > 5. There may be edge effects at the
outer extent of the data.
20100601
Raster
Grid Cell
699
766
1
Universal Transverse Mercator
-2
0.9996
-171
0
500000
10000000
Row and Column
40
40
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).
ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/benthichabitatlayers/Swains_40m_BPIZones.zip
None
20200329
20101102
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)
CRED Data Management Team
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
20101102015912
None
20040210
20060313
https://www.coris.noaa.gov/metadata/records/html/swains_40m_bpizones.html
6022