Bathymetric Position Index (BPI) Structures 5 m grid derived from gridded bathymetry of Rota Island, Commonwealth of the Northern Mariana Islands (CNMI), USA.

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:
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: 20090303
Title:
Bathymetric Position Index (BPI) Structures 5 m grid derived from gridded bathymetry of Rota 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:
Abstract:
BPI Structures are derived from two scales of a focal mean analysis on bathymetry and slope. The grid is based on gridded (5 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 Rota Island. As part of the southern islands in the Mariana Islands archipelago, Rota has a shelf (above -100m) with escarpments that lead to broad flat areas without forming a deeper shelf. Conversely, the northern islands each have a shelf (above -60m), and most have a deep shelf (below -60m), with escarpments that lead outside of the coverage area.
Purpose:
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 400m) benthic habitats for different organisms that inhabit coral reef ecosystems.
Supplemental_Information:
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, rota_5m.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:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20030922
Ending_Date: 20070522
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: 145.107
East_Bounding_Coordinate: 145.313
North_Bounding_Coordinate: 14.225
South_Bounding_Coordinate: 14.092
Keywords:
Theme:
Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
Theme_Keyword: Geographic Information > Habitats
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: 010
Theme:
Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
Theme_Keyword:
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetric Position Index Structures
Theme_Keyword:
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > geomorphology Mapping
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Bathymetric Position Index Structures
Theme_Keyword: Bathymetry
Theme_Keyword: Multibeam sonar
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Rota Island
Place_Keyword: Commonwealth of the Northern Mariana Islands
Place_Keyword: United State of America
Place:
Place_Keyword_Thesaurus: CoRIS Region
Place_Keyword: CNMI
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword:
OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Rota Island > Rota Island ( Luta ) (14N145E0007)
Place_Keyword:
COUNTRY/TERRITORY > Northern Mariana Islands > Rota > Rota Island ( Luta ) (14N145E0007)
Access_Constraints: None
Use_Constraints:
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), the Joint Institute for Marine and Atmospheric Research (JIMAR), NOAA Office of Ocean Exploration and the Hawaii Mapping Research Group (HMRG) as the sources of this information.
Browse_Graphic:
Browse_Graphic_File_Name:
<http://www.soest.hawaii.edu/pibhmc/CNMI_images/rota_5m_BPIstructures_445.jpg>
Browse_Graphic_File_Description: Gridded Bathymetry Derivative
Browse_Graphic_File_Type: JPG
Data_Set_Credit: NOAA PIFSC CRED PIBHMC JIMAR and HMRG
Security_Information:
Security_Classification_System: Not applicable
Security_Classification: Unclassified
Security_Handling_Description: Not applicable
Native_Data_Set_Environment:
ArcGIS ASCII file, derived from bathymetry and slope in ArcGIS 9.3 (Spatial Analyst and Benthic Terrain Modeler)

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
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:
These data are believed to be logically consistent though no tests were performed
Completeness_Report: Complete
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal positioning system: GPS C/A Horizontal position accuracy: 25 meters
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Range resolution of sonar: varies with depth Raw sounding resolution: varies with depth Vertical accuracy of gridded product ~ 1% of water depth
Lineage:
Process_Step:
Process_Description:
Bathymetric Position Index Structures were derived from the gridded multibeam bathymetry (rota_5m) 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 Rota Island. Three fine scale factors (20, 30, 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 250 and 20 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 broad flat (< -100m) structures from the shelf (0 to -100m) environments. The deep shelf class was excluded for Rota since there is not a step in the bathymetry offshore of Rota, rather a gradual escarpment with broad flat areas. The depths were based on the bathymetric drop off of the north and east facing shores of the island.
Process_Date: 20090217

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 2875
Column_Count: 4425
Vertical_Count: 1

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 55
Transverse_Mercator:
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:
Planar_Coordinate_Encoding_Method: Row and Column
Coordinate_Representation:
Abscissa_Resolution: 5
Ordinate_Resolution: 5
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Distribution_Information:
Distributor:
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_Person: John Rooney
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
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:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Arc ASCII
Format_Information_Content:
Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCIItoRaster).
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_rot_geomorph.htm>
Fees: None

Metadata_Reference_Information:
Metadata_Date: 20140312
Metadata_Review_Date: 20090917
Metadata_Contact:
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:
CoRIS_ID: 20090917010305
CoRIS_Children: None
CoRIS_Beginning_Date: 20030922
CoRIS_Ending_Date: 20070522
CoRIS_Metadata_Link:
<http://www.coris.noaa.gov/metadata/records/html/rota_5m_bpistructures.html>
CoRIS_Tracking_ID: 4100

Generated by mp version 2.9.13 on Sat Oct 25 10:43:53 2014