Emily Lundblad, Oregon State Univ.
20040607
CRED Fagatele Bay National Marine Sanctuary Bathymetric Position Index Habitat Structures 2004
1
raster digital data
Tutuila, American Samoa
Fagatele Bay National Marine Sanctuary Office
http://dusk2.geo.orst.edu/djl/samoa
NOAA National Ocean Service (NOS) Special Projects
20040607
Fagatele Bay National Marine Sanctuary Bathymetric Position Index Structures
Tutuila, American Samoa
Fagatele Bay National Marine Sanctuary Office
http://dusk2.geo.orst.edu/djl/samoa
Bathymetric Position Index (BPI) Structures are derived from derivatives of Simrad EM-3000 multibeam bathymetry (1 m and 3 m resolution). BPI structures are surficial characteristics of the
seafloor based on a bathymetric position index value range at a combined fine scale and broad scale, slope values and depth. High-resolution multibeam bathymetry, derivatives of bathymetry (bathymetric position index,
slope and rugosity), backscatter imagery and in situ visual survey data have been combined in a geographic information system (GIS). These data are supplemented by three-dimensional (3D)
visualization. Within this study, methods were developed for benthic mapping and applied to three sites around American Samoa, a new classification scheme was developed for bathymetric
position index (BPI) zones (depressions, slopes, flats, crests) and structures (finer features within zones) around the study sites, and visual survey information was associated with the results.
Structures were derived as a baseline, or framework, for spatial analysis during future habitat studies around American Samoa.
200103
20040607
publication date
As needed
-170.775030
-170.757960
-14.358282
-14.375030
CoRIS Discovery Thesaurus
Geographic Information > Habitats
CoRIS Theme Thesaurus
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > Habitat Mapping
EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Habitats
none
bathymetric position index
BPI
grid
seafloor
derivative
base layer
bathymetry
structures
surficial
fine scale
ISO 19115 Topic Category
imageryBaseMapsEarthCover
oceans
none
Southwest Pacific
American Samoa
Tutuila
Fagatele Bay
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > Tutuila Island > Fagatele Bay (14S170W0002)
COUNTRY/TERRITORY > United States of America > American Samoa > Tutuila Island > Fagatele Bay (14S170W0002)
none
NOT for navigational purposes!!!
Emily Lundblad
NOAA's Pacific Islands Fisheries Science Center's Coral Reef Ecosystem Division
GIS Specialist
mailing and physical address
1680 East-West Road POST 833
Honolulu
Hawaii
96822
USA
808-956-2698
808-956-6539
Emily.Lundblad@noaa.gov
http://data.nodc.noaa.gov/coris/data/NOAA/nmfs/pifsc/cred/benthic_habitat/fagatelebay/habitatstructures/FB-struct2-layout-cite.jpg
Fagatele Bay BPI Structures map
JPEG
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535
Emily Lundblad, Oregon State University
20040607
The Development and Application of Benthic Classifications for Coral Reef Ecosystems Below 30 m Depth using Multibeam Bathymetry: Tutuila, American Samoa
raster digital data
Oregon State University
Department of Geosciences
http://dusk2.geo.orst.edu/djl/theses/lundblad_abs.html
For the bathymetry this grid was derived from:
Soundings have been "cleaned" with a 2nd standard deviation filter to flag outliers (i.e., points beyond the 2nd standard deviation in Simrad bin stat post processing were flagged or removed). Tidal corrections: NOAA, verified, downloaded tide data, preliminary pressure water level data (N1) data are in meters above MLLW datum from station 1770000, Pago Pago, AS. Data have not yet been corrected with differential GPS.
These data are believed to be logically consistent, though no tests were performed.
All structures found were accounted for in the classsification scheme.
Derived from bathymetry that was post-processed with tidal corrections: NOAA, verified, downloaded tide data, preliminary pressure water level data (N1) data are in meters above MLLW datum from station 1770000, Pago Pago, AS.
This study uses the extensive multibeam bathymetry coverage around American Samoa to analyze and classify Bathymetric Position Index (BPI) zones, structures and rugosity for depths that can not
be efficiently reached by other surveying methods. The methods developed here and applied to American Samoa sites are the first to successfully create a benthic
classification for multibeam bathymetry beyond 30 meters depth that extends existing shallow water benthic classifications (See The Development and Application of Benthic
Classifications for Coral Reef Ecosystems Below 30M Depth using Multibeam Bathynmetry: Tutuila, American Samoa, 2004, Appendix A). Spatial analysis was used to derive
slope and multiple scales of bathymetric position from the original bathymetry. The resulting derivative grids were combined with a new algorithm to develop final products:
BPI zones, structures and rugosity classification maps for each study site. The maps make use of a new classification scheme that may be extended to other coral reef systems.
The classification methods identify thirteen structure classes: narrow depression, local depression on flat, lateral midslope depression, depression on crest, broad depression
with an open bottom, broad flat, shelf, open slopes, local crest in depression, local crest on flat, lateral midslope crest, narrow crest, and steep slope.
if (nfb02_tpi20st <= -100 and nfb02_tpi250s <= -100) fb02_20x250 = 1
else if (nfb02_tpi20st <= -100 and nfb02_tpi250s > -100 and nfb02_tpi250s < 100 and nfb02_slp <= 5 ) fb02_20x250 = 2
else if (nfb02_tpi20st <= -100 and nfb02_tpi250s > -100 and nfb02_tpi250s < 100 and nfb02_slp > 5) fb02_20x250 = 3
else if (nfb02_tpi20st <= -100 and nfb02_tpi250s >= 100) fb02_20x250 = 4
else if (nfb02_tpi20st > -100 and nfb02_tpi20st < 100 and nfb02_tpi250s <= -100) fb02_20x250 = 5
else if (nfb02_tpi20st > -100 and nfb02_tpi20st < 100 and nfb02_tpi250s > -100 and nfb02_slp <= 5 and nfb02_1m_utm < -22) fb02_20x250 = 6
else if (nfb02_tpi20st > -100 and nfb02_tpi20st < 100 and nfb02_tpi250s > -100 and nfb02_slp <= 5 and nfb02_1m_utm >= -22) fb02_20x250 = 7
else if (nfb02_tpi20st > -100 and nfb02_tpi20st < 100 and nfb02_tpi250s > -100 and nfb02_slp > 5 and nfb02_slp <= 70) fb02_20x250 = 8
else if (nfb02_tpi20st >= 100 and nfb02_tpi250s <= -100) fb02_20x250 = 9
else if (nfb02_tpi20st >= 100 and nfb02_tpi250s > -100 and nfb02_tpi250s < 100 and nfb02_slp <= 5) fb02_20x250 = 10
else if (nfb02_tpi20st >= 100 and nfb02_tpi250s > -100 and nfb02_tpi250s < 100 and nfb02_slp > 5) fb02_20x250 = 11
else if (nfb02_tpi20st >= 100 and nfb02_tpi250s >= 100) fb02_20x250 = 12
else if (nfb02_tpi20st > -100 and nfb02_tpi20st < 100 and nfb02_tpi250s > -100 and nfb02_slp > 70) fb02_20x250 = 13
endif
where
(1) narrow depression, (2) local depression on flat, (3) lateral midslope depression, (4) depression on crest, (5)
broad depression with an open bottom, (6) broad flat, (7) shelf, (8) open slopes, (9) local crest in depression,
(10) local crest on flat, (11) lateral midslope crest, (12) narrow crest, and (13) steep slope.
For additional information see ftp://ftp.soest.hawaii.edu/pibhmc/web/docs/Lundblad_Thesis.pdf
http://dusk.geo.orst.edu/djl/samoa
20030624
Emily Lundblad
NOAA's Pacific Islands Fisheries Science Center's Coral Reef Ecosystem Division
GIS Specialist
mailing and physical address
1680 East-West Road POST 833
Honolulu
Hawaii
96822
USA
808-956-2698
808-956-6539
Emily.Lundblad@noaa.gov
Raster
Grid Cell
624
620
1
Universal Transverse Mercator
-2
0.999600
-171.000000
0.000000
500000.000000
10000000.000000
Row and Column
2.965509
2.965509
meters
D_WGS_1984
WGS_1984
6378137.000000
298.257224
Emily Lundblad
NOAA's Pacific Islands Fisheries Science Center's Coral Reef Ecosystem Division
GIS Specialist
mailing and physical address
1680 East-West Road POST 833
Honolulu
Hawaii
96822
USA
808-956-2698
808-956-6539
Emily.Lundblad@noaa.gov
Downloadable Data
NOT for navigational purposes!!!
NOAA makes no warranty regarding these data,expressed or implied, nor
does the fact of distribution constitute such a warranty. NOAA does
not 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.
ArcInfo Interchange Export (*.e00) files
0.086
DVD+R
none
ArcInfo, ArcView, ArcExplorer, ArcGIS
Possibly the cost of the DVD.
ArcInfo Interchange Export Format (*.e00) files ASCII
ftp://ftp.nodc.noaa.gov/coris/data/nmfs/cred/habitat/fagatelebay/export/fbstructures02_20x250.zip
Use IMPORT71 to convert .e00 ASCII files. IMPORT71 is a stand-alone program that converts an ARC/INFO interchange file created on any other operating system into a ARC/INFO 7.x coverage or grid.
If you receive ARC/INFO data in interchange format you can use IMPORT71 to convert it to a data source in a format that can be added to a project or view in ArcView (or used in other mapping programs).(Source: ArcView 3.2 help) If you have ArcView GIS you already have IMPORT71.
None for online files.
http://dusk.geo.orst.edu/djl/samoa
20080829
NOAA's Pacific Islands Fisheries Science Center's Coral Reef Ecosystem Division
Emily Lundblad
GIS Specialist
mailing and physical address
1680 East-West Road POST 833
Honolulu
Hawaii
96822
USA
808-956-2698
808-956-6539
Emily.Lundblad@noaa.gov
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
Local Time
20060614050315
None
20010301
20040607
http://www.coris.noaa.gov/metadata/records/txt/cred_habitat_structures_fagatele_bay_2004.txt
1151