Bathymetric Position Index (BPI) Structures 10 m grid derived from gridded bathymetry of Sarigan Island, Commonwealth of the Northern Mariana Islands (CNMI), USA.
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Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator:
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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)
- Publication_Date: 20090401
- Title:
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Bathymetric Position Index (BPI) Structures 10 m grid derived from gridded
bathymetry of Sarigan Island, Commonwealth of the Northern Mariana
Islands (CNMI), USA.
- Geospatial_Data_Presentation_Form: raster digital data
- Online_Linkage: http://www.soest.hawaii.edu/pibhmc
- Description:
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- Abstract:
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BPI Structures are derived from two scales of a focal mean
analysis on bathymetry and slope. The grid is based on
gridded (10 m cell size) multibeam bathymetry, collected aboard NOAA
Ship Hi'ialakai and R/V AHI, and it was created using the Benthic
Terrain Modeler (http://www.csc.noaa.gov/products/btm/). Cell values
represent one of 14 classes in an index of seafloor terrains. This
data set is for the shelf and slope environments of Sarigan Island. As
part of the northern islands of the Mariana Islands archipelago,
Sarigan's offshore terrain has a shelf (above -60m), and a deep shelf
(below -60m), with escarpments that lead outside of the coverage area.
Conversely, the southern islands each have a shelf (above -100m) with
escarpments that lead to broad flat areas without forming a deeper shelf.
- Purpose:
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The data were derived in support of 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 to 800m)
benthic habitats for different organisms that inhabit coral
reef ecosystems.
- Supplemental_Information:
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Gridded multibeam data were collected aboard the Hi'ialakai, a
218' United States National Oceanographic and Atmospheric
Administration (NOAA) research ship, and 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 metadata for the bathymetry is documented in
the product metadata, sarigan_10m.txt.
(http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_bathy.htm)
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/
The terrestrial elevation data shown in the map for this data set are
SRTM Finished 3 arc sec Shaded Relief. They were collected during
NASA's Shuttle Radar Topograph Mission (SRTM). For more information
on the mission, go to:
http://www2.jpl.nasa.gov/srtm/faq.html#data. The data are available
from the United States Geological Survey (USGS) as reformatted
elevation data that are consistent with other Digital Elevation Models.
- Time_Period_of_Content:
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- Time_Period_Information:
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- Range_of_Dates/Times:
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- Beginning_Date: 20070525
- Ending_Date: 20070608
- Currentness_Reference: ground condition
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: As needed
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: 145.747
- East_Bounding_Coordinate: 145.827
- North_Bounding_Coordinate: 16.738
- South_Bounding_Coordinate: 16.675
- Keywords:
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- Theme:
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- Theme_Keyword_Thesaurus: NCEI Geoportal Filter
- Theme_Keyword: CoRIS_Metadata
- Theme:
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- Theme_Keyword_Thesaurus: CRCP Project
- Theme_Keyword:
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Benthic Habitat Mapping and Characterization - Commonwealth of the Northern Mariana Islands and Guam
- Theme_Keyword: 1398
- Theme:
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- Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
- Theme_Keyword: Geographic Information > Habitats
- Theme:
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- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: imageryBaseMapsEarthCover
- Theme_Keyword: 010
- Theme:
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- Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
- Theme_Keyword:
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EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetric Position Index Structures
- Theme_Keyword:
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EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > geomorphology Mapping
- Theme:
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- Theme_Keyword_Thesaurus: None
- Theme_Keyword: Bathymetric Position Index Structures
- Theme_Keyword: Bathymetry
- Theme_Keyword: Multibeam sonar
- Place:
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- Place_Keyword_Thesaurus: None
- Place_Keyword: Sarigan Island
- Place_Keyword: Commonwealth of the Northern Mariana Islands
- Place_Keyword: United State of America
- Place:
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- Place_Keyword_Thesaurus: CoRIS Region
- Place_Keyword: CNMI
- Place:
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- Place_Keyword_Thesaurus: CoRIS Place Thesaurus
- Place_Keyword:
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OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Sarigan Island > Sarigan Island (16N145E0003)
- Place_Keyword:
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COUNTRY/TERRITORY > Northern Mariana Islands > Sarigan Island > Sarigan Island (16N145E0003)
- Access_Constraints: None
- Use_Constraints:
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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 (PIBHMC), and
the Joint Institute for Marine and Atmospheric Research (JIMAR)
as the sources of this information.
- Browse_Graphic:
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- Browse_Graphic_File_Name:
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http://www.soest.hawaii.edu/pibhmc/CNMI_images/sarigan_10m_BPIstructures_445.jpg
- Browse_Graphic_File_Description: Gridded Bathymetry Derivative
- Browse_Graphic_File_Type: JPG
- Data_Set_Credit: NOAA PIFSC CRED PIBHMC and JIMAR
- Security_Information:
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- Security_Classification_System: Not applicable
- Security_Classification: Unclassified
- Security_Handling_Description: Not applicable
- Native_Data_Set_Environment:
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ArcGIS ASCII file, derived from bathymetry and
slope in ArcGIS 9.3 (Spatial Analyst and Benthic Terrain Modeler)
- Data_Quality_Information:
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report:
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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.
- Logical_Consistency_Report:
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These data are believed to be logically
consistent though no tests were performed
- Completeness_Report: Complete
- Positional_Accuracy:
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- Horizontal_Positional_Accuracy:
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- Horizontal_Positional_Accuracy_Report:
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Horizontal positioning system: GPS C/A
Horizontal position accuracy: 25 meters
- Vertical_Positional_Accuracy:
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- Vertical_Positional_Accuracy_Report:
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Range resolution of sonar: varies with depth
Raw sounding resolution: varies with depth
Vertical accuracy of gridded product ~ 1% of water depth
- Lineage:
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- Process_Step:
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- Process_Description:
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Bathymetric Position Index Structures were derived from the gridded
multibeam bathymetry (sarigan_10m) 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 Structures are derived from two scales of a focal mean analysis
on bathymetry and slope. After testing combinations, two
scales of bpi (50 & 250) were chosen for Sarigan Island. Two fine
scale factors (20 and 50) and two broad scale factors
(250 and 500) were tested in different combinations. After measuring
many of the bathymetric features that indicate possible reef structures
when overlaid on the hillshade, initially the values of 500 and 50 were
used (also after Lundblad et al. 2006; see Supplemental_Information).
However, after running the Benthic Terrain Modeler (BTM), it was
apparent that most of the fine scale structures were hard to identify in
the classification. Therefore, the other scales of BPI grids were
created and used in the Terrain Classification Builder (part of the BTM)
to create multiple structure and zone grids. The combination of
20 (or 30) and 250 brought out those fine scale structures, including
the broad crests, which are very important in coral reef environments.
However, the fine scale factor of 50 defined the fine scale structures
as more continuous features and cancelled out a lot of the noise that
was falsely defined by using 20 or 30. Additionally, three ranges of
slope define flats, slopes, and near vertical: x < 5; 5 < x < 70;
x > 70. Depth bounds separated flat structures into shelf (0 to -60m)
and deep shelf (-60 to -1000m) environments. The depths were based on
the bathymetric drop offs on the East side of the island.
- Process_Date: 20090323
- Spatial_Data_Organization_Information:
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- Direct_Spatial_Reference_Method: Raster
- Raster_Object_Information:
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- Raster_Object_Type: Grid Cell
- Row_Count: 697
- Column_Count: 843
- Vertical_Count: 1
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
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- Planar:
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- Grid_Coordinate_System:
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- Grid_Coordinate_System_Name: Universal Transverse Mercator
- Universal_Transverse_Mercator:
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- UTM_Zone_Number: 55
- Transverse_Mercator:
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- Scale_Factor_at_Central_Meridian: 0.9996
- Longitude_of_Central_Meridian: 147
- Latitude_of_Projection_Origin: 0
- False_Easting: 500000
- False_Northing: 0
- Planar_Coordinate_Information:
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- Planar_Coordinate_Encoding_Method: Row and Column
- Coordinate_Representation:
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- Abscissa_Resolution: 10
- Ordinate_Resolution: 10
- Planar_Distance_Units: meters
- Geodetic_Model:
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- Horizontal_Datum_Name: D_WGS_1984
- Ellipsoid_Name: WGS_1984
- Semi-major_Axis: 6378137.000000
- Denominator_of_Flattening_Ratio: 298.257224
- Distribution_Information:
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- Distributor:
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- Contact_Information:
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- Contact_Organization_Primary:
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- Contact_Organization:
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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)
- Contact_Person: John Rooney
- Contact_Address:
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- Address_Type: mailing and physical address
- Address: NOAA IRC
- Address: NMFS/PIFSC/CRED
- Address: 1845 WASP Blvd., Building 176
- City: Honolulu
- State_or_Province: HI
- Postal_Code: 96818
- Contact_Voice_Telephone: 808 725-5360
- Contact_Facsimile_Telephone: 808 725-5429
- Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
- Contact_Instructions: e-mail preferred
- Resource_Description: Downloadable Data
- Distribution_Liability:
-
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.
- Standard_Order_Process:
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- Digital_Form:
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- Digital_Transfer_Information:
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- Format_Name: Arc ASCII
- Format_Information_Content:
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Arc ASCII can be converted to Arc Raster
using ArcToolbox Conversion Tools (ASCIItoRaster).
- Digital_Transfer_Option:
-
- Online_Option:
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- Computer_Contact_Information:
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- Network_Address:
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- Network_Resource_Name:
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http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/cnmi-guam/sarigan-island/sarigan-island-geomorphology/
- Fees: None
- Metadata_Reference_Information:
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- Metadata_Date: 20190605
- Metadata_Review_Date: 20090917
- Metadata_Contact:
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- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization:
-
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)
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: NOAA IRC
- Address: NMFS/PIFSC/CRED
- Address: 1845 WASP Blvd., Building 176
- City: Honolulu
- State_or_Province: HI
- Postal_Code: 96818
- Contact_Voice_Telephone: 808 725-5360
- Contact_Facsimile_Telephone: 808 725-5429
- Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
- Contact_Instructions: e-mail preferred
- Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
- Metadata_Standard_Version: FGDC-STD-001-1998
- Metadata_Time_Convention: Universal Time
- Metadata_Access_Constraints: None
- Metadata_Use_Constraints: None
- CoRIS:
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- CoRIS_ID: 20090917023549
- CoRIS_Children: None
- CoRIS_Beginning_Date: 20070525
- CoRIS_Ending_Date: 20070608
- CoRIS_Metadata_Link:
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https://www.coris.noaa.gov/metadata/records/html/sarigan_10m_bpistructures.html
- CoRIS_Tracking_ID: 4109
Generated by mp version 2.9.48 on Thu Sep 21 11:08:45 2023