12617 BPI Structures Data Set Published / External 12598 Geomorphology Project Completed 2018 Bathymetric Position Index (BPI) Structures are derived for islands and banks across the U.S. Pacific Islands Region from a focal mean analysis on bathymetry and slope, and were created using the Benthic Terrain Modeler. Cell values represent one of 13 classes in an index of seafloor terrains. The grids are based primarily on gridded multibeam bathymetry collected aboard NOAA Ships Hi'ialakai and Oscar Elton Sette and aboard R/V AHI (Acoustic Habitat Investigator) from 2003 to 2012 by the PIFSC Ecosystem Sciences Division (ESD). Other sources of available data used to derive BPI Zones for a few locations include estimated depths derived from IKONOS satellite imagery from 2000 to 2002, LIDAR data from 2001 and 2007, and multibeam bathymetry collected in 2001 and 2002. The BPI Structure grid generated for each location is available via the Pacific Islands Benthic Habitat Mapping Center (PIBHMC) website. The data, maps, layer files, and detailed documentation (more specific than this pacific-wide record) about the data sources and data processing steps used are included in the zip file for each location. Data is available here: https://www.soest.hawaii.edu/pibhmc/cms/data-by-location/ Prepared by the PIFSC Ecosystem Sciences Division (ESD) and funded by the NOAA Coral Reef Conservation Program (CRCP), the data were derived in support of CRCP goals to map all U.S. coral reef ecosystems by developing high-resolution benthic maps to characterize priority 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 benthic habitats for different organisms that inhabit coral reef ecosystems. These maps were made possible with funding from the CRCP, and additional support was received from the NOAA Habitat Blueprint for the West Hawaii Focus Area. Weiss, A. D. 2001. Topographic positions and landforms analysis (Conference Poster). ESRI International User Conference., San Diego, CA July 9–13. https://www.jennessent.com/downloads/tpi-poster-tnc_18x22.pdf The source bathymetry data collected and gridded by PIFSC Ecosystem Sciences Division (ESD) are documented and hosted separately on the Pacific Islands Benthic Habitat Mapping Center (PIBHMC) website. Theme ISO 19115 Topic Category elevation Theme CRCP Project 467 Theme CRCP Project Benthic Habitat Mapping and Characterization in the Pacific Islands Region Theme CRCP Project Mapping and EcoSpatial Information Products to Support Coral Reef Ecosystem Management in the Pacific Islands Region Theme CoRIS Discovery Thesaurus Geographic Information > Bathymetry Theme CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat Theme CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat Theme CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > Habitat Mapping Theme CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping > geomorphology Mapping Theme CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetric Position Index Structures Theme CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry Theme CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs Theme NODC DATA TYPES THESAURUS seafloor topography Theme NODC OBSERVATION TYPES THESAURUS GIS product Theme NODC OBSERVATION TYPES THESAURUS derived products Theme NODC PROJECT NAMES THESAURUS Coral Reef Conservation Program Theme NODC SUBMITTING INSTITUTION NAMES THESAURUS US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division Theme BPI Theme Bathymetric Position Index Theme CRED Theme CREP Theme Coral Reef Ecosystem Division Theme Coral Reef Ecosystem Program Theme ESD Theme Ecosystem Sciences Division Theme Habitat Blueprint Theme Habitat Focus Area Theme PIBHMC Theme PIFSC Theme Pacific Islands Benthic Habitat Mapping Center Theme Pacific Islands Fisheries Science Center Theme Seafloor Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > Northern Mariana Islands > Northern Mariana Islands > Northern Mariana Islands ( CNMI ) (18N146E0000) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > American Samoa (14S170W0000) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Guam > Guam (13N144E0000) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Hawaii > Hawaii > Hawaii Island (19N155W0003) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Brooks Banks (24N166W0002) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > French Frigate Shoals (24N166W0001) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Kure Atoll (28N178W0001) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Northwestern Hawaiian Islands (28N178W0000) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Pearl and Hermes Reef (27N176W0001) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Hawaii > Kauai > Niihau Island (21N160W0001) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Hawaiian Islands (21N157W0027) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Baker Island (00N176W0001) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Howland Island (00S176W0001) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Johnston Atoll (16N169W0001) Spatial CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Wake Atoll (19N167E0001) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > American Samoa > American Samoa (14S170W0000) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Baker Island > Baker Island (00N176W0001) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands (21N157W0027) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Hawaii Island > Hawaii Island (19N155W0003) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Niihau Island > Niihau Island (21N160W0001) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Howland Island > Howland Island (00S176W0001) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Johnston Atoll > Johnston Atoll (16N169W0001) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands (28N178W0000) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Brooks Banks (24N166W0002) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > French Frigate Shoals (24N166W0001) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Kure Atoll (28N178W0001) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Pearl and Hermes Reef (27N176W0001) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Wake Atoll > Wake Atoll (19N167E0001) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Guam (13N144E0000) Spatial CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Mariana Archipelago > Northern Mariana Islands ( CNMI ) (18N146E0000) Spatial NODC SEA AREA NAMES THESAURUS Equatorial Pacific Ocean Spatial NODC SEA AREA NAMES THESAURUS Marianas Trench Marine National Monument Spatial NODC SEA AREA NAMES THESAURUS NW Pacific Spatial NODC SEA AREA NAMES THESAURUS North Pacific Ocean Spatial NODC SEA AREA NAMES THESAURUS Pacific Remote Islands Marine National Monument Spatial NODC SEA AREA NAMES THESAURUS Papahanaumokuakea Marine National Monument Spatial NODC SEA AREA NAMES THESAURUS Rose Atoll Marine National Monument Spatial NODC SEA AREA NAMES THESAURUS South Pacific Ocean Spatial American Samoa Spatial CNMI Spatial Commonwealth of the Northern Mariana Islands Spatial Guam Spatial MHI Spatial Main Hawaiian Islands Spatial Mariana Islands Spatial Marianas Spatial NWHI Spatial Northwestern Hawaiian Islands Spatial PRIA Spatial Pacific Remote Island Areas Spatial West Hawaii Stratum Global Change Master Directory SEA FLOOR Pacific Islands Fisheries Science Center Honolulu HI USA Data Set GIS dataset of raster files None Planned Updated the 50-m product for Wake Atoll in 2018 Map (digital) The Bathymetric Position Index (BPI) is a measure of where a referenced location is relative to the locations surrounding it. BPI is derived from a bathymetric dataset using a topographic position index (TPI) modified by Andrew Weiss and applied in the Benthic Terrain Modeler in ArcGIS. The BPI datasets are standardized to the values of the raster data set. A classification dictionary is created to define the number and type of classifications of seafloor characteristics. Values assigned during classification are defined within the classification dictionary and range from 1-13. While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. PIFSC Ecosystem Sciences Division and funded by the NOAA Coral Reef Conservation Program (and the NOAA Habitat Blueprint for West Hawaii) Not applicable Not applicable Not applicable Data Set Credit 2003 Organization NOAA Coral Reef Conservation Program CRCP 1305 East West Highway 10th Floor Silver Spring MD 20910-3281 (301) 713-3155 https://coralreef.noaa.gov Link to the NOAA Coral Reef Conservation Program website Online Resource Data Steward 2018 Person Acoba, Tomoko S tomoko.acoba@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5448 8:00 am - 4:00 pm HST email preferred Data Steward 2015 2017 Person Suka, Rhonda rhonda.suka@noaa.gov https://orcid.org/0000-0002-6296-090X 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5494 Email preferred Distributor 2018 Person Lichowski, Frances frances.lichowski@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5476 email preferred Distributor 2008 2017 Person Akridge, Michael W michael.akridge@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5483 Email preferred Metadata Contact 2025-11-11 Person Akridge, Michael W michael.akridge@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5483 Metadata Contact 2010 Person DesRochers, Annette M annette.desrochers@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5461 8 am - 5 pm Email preferred Originator 2003 Organization Pacific Islands Fisheries Science Center PIFSC pifsc.info@noaa.gov https://ror.org/02apffz65 1845 Wasp Blvd. Honolulu HI 96818 USA 808-725-5360 https://www.pifsc.noaa.gov Pacific Island Fisheries Science Center homepage Online Resource 8:00 a.m. - 4:30 p.m. Point of Contact 2025-11-11 Person Akridge, Michael W michael.akridge@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5483 Point of Contact 2016 Person DesRochers, Annette M annette.desrochers@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5461 8 am - 5 pm Email preferred Ground Condition Main Hawaiian Islands, including West Hawaii and Niihau. -156.100504 -155.822838 20.061727 19.772429 West Hawaii -160.292237 -160.01701 22.056916 21.729768 Niihau Discrete 2005 Time frame for multibeam data collected by NOAA CREP included in the bathymetry grid used to derived slope for Ni'ihau. Mapping missions include HI0504 and AHI0504. Discrete 2012 Time frame for multibeam data collected by NOAA CREP included in the bathymetry grid used to derived slope for West Hawaii. Mapping mission includes SB1207. Northwestern Hawaiian Islands, including French Frigate Shoals, Pearl and Hermes Atoll, Brooks Banks and Kure Atoll. -178.378433 -166.11682 28.453633 23.62792 Range 2000 2001 Time frame for satellite-derived estimated depths included in the bathymetry grids used to derived slope for Kure (2000-2001) and Pearl and Hermes (2001) Range 2005 2008 Time frame for multibeam data collected by NOAA CREP included in the bathymetry grids used to derived slope for Kure, Pearl and Hermes, Brooks Banks, and French Frigate Shoals. Mapping missions include HI0501, AHI0501, HI0503, HI0507, HI0609, AHI0609, HI0612, AHI0612, HI0804, and AHI0804. Mariana Archipelago including Guam, Rota, Tinian, Saipan, Pagan, Asuncion, Supply Reef, Sarigan, Guguan, Farallon de Pajaros, Alamagan, Agrihan, Galvez, Farallon de Medinilla, and Maug. 144.62592 145.81568649 20.03570278 13.24126317 Range 2000 2002 Time frame for satellite-derived estimated depths included in the bathymetry grid used to derived slope for Tinian. Discrete 2001 Time frame for LiDAR data collected by NAVOO included in the bathymetry grids used to derived slope for Guam, Saipan and Tinian Range 2003 2010 Time frame for multibeam data collected by NOAA CREP (except where noted otherwise) included in the bathymetry grids used to derived slope for several locations in the Mariana Archipelago. Mapping missions include: 2003: AHI0307 to Guam, Rota, Tinian, and Saipan 2007: AHI0702 and HI0702 to Guam, Rota, Saipan and Tinian. 2007: AHI0703 and HI0703 to Saipan, Tinian, Sarigan, Guguan, Alamagan, Pagan, Agrihan, Asuncion, Maug, Supply Reef, and Farallon de Pajaros. 2008: Apra Harbor, Guam (collected by the Naval Oceanographic Office and NOAA Office of Coast Survey) 2010: SE1002 to Guam, Rota, Galvez Bank, and Farallon de Medinilla. Discrete 2007 Time frame for LiDAR data collected by JALBTCX included in the bathymetry grid used to derived slope for Guam. Pacific Remote Islands Marine National Monument (PRIMNM), also known as the Pacific Remote Island Areas, including Baker, Howland, and Wake islands, and Johnston atoll. 166.59824 -159.97264 19.31627096 -0.38235459 Range 2006 2007 Time frame for multibeam data collected by NOAA CREP included in the bathymetry grids used to derived slope for the several locations in the Pacific Remote Island Areas. Mapping missions include: 2006: Mission HI0601 and AHI0601 to Howland, Baker and Johnston 2007: Mission HI0701 and AHI0701 to Wake American Samoa, including Tutuila, Manu'a (Ofo, Olosega, and Ta'u) Islands, and Rose Atoll Marine National Monument and the National Marine Sanctuary of American Samoa including Swains Island. -171.2186230908 -168.131605 -10.934991 -14.604747 Range 2001 2002 Time frame for additional multibeam data included in the bathymetry grid used to derived slope for Tutuila. Discrete 2002 Time frame for satellite-derived estimated depths included in the bathymetry grids used to derived slope for the Manu'a (Ofo, Olosega and Ta'u) and Rose Atoll. Range 2004 2006 Time frame for multibeam data collected by NOAA CREP included in the bathymetry grids used to derived slope for the several locations in American Samoa. Mapping missions include: 2004: Mission AHI0402 to Tutuila and the Manu'a (Ofo, Olosega and Ta'u) 2006: Mission AHI0602 and HI0602 to Tutuila, Rose and Swains Unclassified Not applicable Not applicable NOAA Coral Reef Ecosystem Program (CREP) Data Sharing Recommendations, version 9.0 updated August 12, 2015: CREP welcomes the opportunity to collaborate on research issues contributing to the scientific basis for better management of marine ecosystems. CREP has a very diverse set of field activities that generates large volumes of data using an array of data collection protocols. The following recommendations are for your consideration as you use this data: 1) Data analyses should take all field exigencies into account. The most effective way to do this would be active collaboration with CREP principal investigators. 2) In all presentations, product releases, or publications using data generated by CREP, proper acknowledgement of both CREP and the individuals responsible for data collection is expected. Citing the DOI (if available) is preferred, a non-DOI example is listed below. 3) If you collect or generate data for the same study areas, CREP requests that you share relevant information on complimentary data collections. 4) Those receiving data are strongly urged to inform the CREP Data Management Team of any errors and discrepancies that are discovered during the course of using these data. They are further urged to bring to the attention of the Team all problems and difficulties encountered in using these data. This information is necessary in order to improve the collections and to facilitate more efficient and economical data processing and retrieval. The users are asked to supply copies of any missing data that may be located, and to provide information as to significant subsets and special aggregations of data that are developed in using the material provided. Example citation: "This publication makes use of data products provided by the Ecosystem Sciences Division, Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), with funding support from the NOAA Coral Reef Conservation Program (CRCP). The analysis and interpretations presented here are solely that of the current authors.” Data can be accessed online via the Pacific Islands Benthic Habitat Mapping Center website. None These data are not to be used for navigation purposes. Please cite PIFSC Ecosystem Sciences Division (ESD) when using the data. Suggested citation: Ecosystem Sciences Division; Pacific Islands Fisheries Science Center (2018). Bathymetric Position Index (BPI) Structures Grid Derived from Gridded Bathymetry for Select U.S. Coral Reef Locations across the Pacific Ocean. Pacific Islands Benthic Habitat Mapping Center, https://www.fisheries.noaa.gov/inport/item/12617. [access date] None None ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/benthichabitatlayers/OfuOlo_5m_BPIStructures.zip OfuOlo_5m_BPIStructures.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Ofu and Olosega Islands that includes details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/benthichabitatlayers/Rose_5m_BPIstructures.zip Rose_5m_BPIstructures.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Rose Atoll that includes details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/benthichabitatlayers/Swains_40m_BPIStructures.zip Swains_40m_BPIStructures.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Swains that includes details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/benthichabitatlayers/Tau_5m_BPIstructures.zip Tau_5m_BPIstructures.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Ta'u that includes details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/benthichabitatlayers/Tutuila_5m_BPIstructures.zip Tutuila_5m_BPIstructures.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Tutuila that includes details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/FDP_10m_BPIstructures.zip FDP_10m_BPIstructures.zip Zip file containing 10-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Farallon de Pajaros that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/agrihan_10m_BPIstructures.zip agrihan_10m_BPIstructures.zip Zip file containing 10-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Agrihan that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/alamagan_10m_BPIstructures.zip alamagan_10m_BPIstructures.zip Zip file containing 10-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Alamagan that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/asuncion_10m_BPIstructures.zip asuncion_10m_BPIstructures.zip Zip file containing 10-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Agrihan that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/gal_5m_BPIstructures.zip gal_5m_BPIstructures.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Galvez and South Galvez Banks and Eleven-mile reef that includes specific details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/guam_5m_BPIstructures.zip guam_5m_BPIstructures.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Guam that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/guam_60m_BPIstructures.zip guam_60m_BPIstructures.zip Zip file containing 60-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Guam that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/guguan_10m_BPIstructures.zip guguan_10m_BPIstructures.zip Zip file containing 10-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Guguan that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/maug_10m_BPIstructures.zip maug_10m_BPIstructures.zip Zip file containing 10-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Maug that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/pagan_10m_BPIstructures.zip pagan_10m_BPIstructures.zip Zip file containing 10-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), and metadata (TXT) specifically for Pagan that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/rota_5m_BPIstructures.zip rota_5m_BPIstructures.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Rota that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/rota_60m_BPIstructures.zip rota_60m_BPIstructures.zip Zip file containing 60-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Rota that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/saipan_5m_BPIstructures.zip saipan_5m_BPIstructures.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Saipan that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/sarigan_10m_BPIstructures.zip sarigan_10m_BPIstructures.zip Zip file containing 10-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Sarigan that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/supply_10m_BPIstructures.zip supply_10m_BPIstructures.zip Zip file containing 10-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Supply Reef that includes specific details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/benthichabitatlayers/tinian_5m_BPIstructures.zip tinian_5m_BPIstructures.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Tinian that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/mhi/benthichabitatlayers/Nii_5m_BPIStructures.zip Nii_5m_BPIStructures.zip Zip file containing Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Ni'ihau that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/mhi/benthichabitatlayers/WestHawaii_BPIstructures.zip WestHawaii_BPIstructures.zip Zip file containing Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), and ArcGIS layer (LYR) for West Hawaii, Main Hawaiian Islands, as well as the pacific-wide metadata data (XML). Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/nwhi/benthichabitatlayers/Brooks_20m_BPIStructures.zip Brooks_20m_BPIStructures.zip Zip file containing 20-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Brooks Bank that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/nwhi/benthichabitatlayers/Brooks_5m_BPIStructures.zip Brooks_5m_BPIStructures.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Brooks Bank that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/nwhi/benthichabitatlayers/FFS_5m_BPIstructures.zip FFS_5m_BPIstructures.zip Zip file containing Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for French Frigate Shoals that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/nwhi/benthichabitatlayers/kure_5m_BPIstructures.zip kure_5m_BPIstructures.zip Zip file containing Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Kure that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/nwhi/benthichabitatlayers/ph_5m_BPIstructures.zip ph_5m_BPIstructures.zip Zip file containing Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Pearl and Hermes Atoll that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/pria/benthichabitatlayers/Baker_20m_BPIstructures.rar Baker_20m_BPIstructures.rar Archive file containing 20-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Baker that includes details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). RAR Archive RAR ftp://ftp.soest.hawaii.edu/pibhmc/website/data/pria/benthichabitatlayers/Howland_40m_BPIStructures.rar Howland_40m_BPIStructures.rar Archive file containing 40-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Howland that includes details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). RAR Archive RAR ftp://ftp.soest.hawaii.edu/pibhmc/website/data/pria/benthichabitatlayers/Johnston_20m_BPIStructures.rar Johnston_20m_BPIStructures.rar Archive file containing 20-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Johnston that includes details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). RAR Archive RAR ftp://ftp.soest.hawaii.edu/pibhmc/website/data/pria/benthichabitatlayers/Wake_10m_BPIStructures.zip Wake_10m_BPIStructures.zip Zip file containing 10-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Wake that includes details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). Zip Zip ftp://ftp.soest.hawaii.edu/pibhmc/website/data/pria/benthichabitatlayers/Wake_50m_BPIStructures.zip Wake_50m_BPIStructures.zip Zip file containing 50-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Wake that includes details about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). 2018-09-13T00:00:00 Zip Zip https://www.soest.hawaii.edu/pibhmc/data_all/cnmi-guam/bathymetry/FDM_5m_Bathymetry.zip fdm_5m_bpis.zip Zip file containing 5-meter Bathymetric Position Index (BPI) Structures data (ASC), maps (PDF and JPG), ArcGIS layer (LYR) and metadata (TXT) specifically for Farallon de Medinilla that includes specific details for the island about the methods, data quality, sources, etc. Arc ASCII can be converted to Arc Raster using ArcToolbox Conversion Tools (ASCII to Raster). https://www.soest.hawaii.edu/pibhmc/cms/data-by-location/cnmi-guam/farallon-de-medinilla/farallon-de-medinilla-bathymetry/ Zip Zip https://coast.noaa.gov/digitalcoast/tools/btm Benthic Terrain Modeler Online Resource HTML by NOAA Office for Coastal Management Digital Coast. https://www.arcgis.com/home/item.html?id=b0d0be66fd33440d97e8c83d220e7926 Benthic Terrain Modeler for ArcGIS Online Resource HTML Benthic Terrain Modeler, tools for understanding and classifying the benthic environment. https://www.coris.noaa.gov/search/rest/find/document?searchText=PIBHMC%20AND%20BPI%20AND%20title%3Astructures&start=1&max=500&f=georss&dojo.preventCache=1489091526010 Coral Reef Information System (CoRIS) Geoportal GeoRSS feed Online Resource Coral Reef Information System (CoRIS) Geoportal GeoRSS feed containing all metadata records associated with this catalog item (view list via Internet Explorer). https://www.soest.hawaii.edu/pibhmc/cms/ Pacific Islands Benthic Habitat Mapping Center (PIBHMC) website Online Resource HTML All data described herein are accessible through this website. https://www.soest.hawaii.edu/pibhmc/cms/data-by-location/ Updated Map Data Access 2026 Online Resource Pacific Islands Benthic Habitat Mapping Center: Search maps by location. Distribution links may be outdated - but should be searchable on this website. Bathymetric Position Index Structures were derived from gridded bathymetry using the Benthic Terrain Modeler (BTM). Spatial reference: Universal Transverse Mercator (UTM), zone varies by location. See maps and/or individual metadata found in each location's zip file in the distribution information section for specific cell size and spatial reference (UTM zone) information. BPI values are primarily derived from gridded bathymetry data that is collected from a number of NOAA vessels using multibeam sonars. This multibeam data may be synthesized with other data including LiDAR bathymetry and Ikonos or WorldView satellite image derived bathymetry. Multibeam data collection targets waters from 20 meters to 500 meters depth. LiDAR and satellite derived bathymetry target waters less than 20 meters depth. The goal of all data collection is to collect data over the entire seafloor within the 0-500 meter depth range. Horizontal positioning system: GPS C/A Horizontal position accuracy: typically 25 meters (refer to individual metadata files for each island for specific accuracy based on data sources used) Range resolution of sonar: varies with depth Raw sounding resolution: varies with depth Vertical accuracy of gridded product ~ 1% of water depth BPI values have been determined for areas where gridded bathymetry data is available based primarily on geographic priorities set by funding sources (Tier 1 priorities set by the Coral Reef Conservation Program include the Mariana Archipelago, American Samoa, and the Main Hawaiian Islands). Areas outside these geographic priorities have been generated as time and resources have allowed. In some cases, BPI values have intentionally not been produced for areas if the underlying bathymetry is not of sufficient quality or coverage (e.g., some locations in the PRIA), or if the resulting BPI data is not meaningful (e.g., at Thirty-five and Thirty-seven Fathom Banks there was too little change in elevation to create distinct bathymetric zones using the existing classification dictionary, and as a result the entire banktops would be classified as ‘flats’). Some gaps exist in bathymetry coverage due to hazardous conditions that prohibited access for the NOAA vessels or to limited time or funding resources. Different scales were used in the focal mean analysis to predict BPI (reef) structures for each location. See the maps and metadata for each location for specific details. Multibeam bathymetry data were collected by different NOAA vessels using the same or similar collection methods. All multibeam data processing was conducted in the same or similar manner by the PIFSC Ecosystem Sciences Division. The MHI bathymetry synthesis provided by the Hawaii Mapping Research Group was the source data for the Main Hawaiian Islands products. Corrections for tide variation and vessel attitude are applied to the multibeam data and a CTD (Conductivity, Temperature, and Depth instrument) cast is performed regularly during data collection to correct for variance within the water column. Multibeam data are tested for internal consistency; however, no effort is made to compare these data to external references or to other published data. Yes Unknown Yes No Unknown No Archiving Intended Unknown University of Hawaii School of Ocean and Earth Science and Technology, NOAA IRC and NOAA Fisheries ITS resources and assets. The method to develop the BPI data layers are generally described in the Benthic Habitat Mapping "Overview" section of the Pacific Islands Benthic Habitat Mapping Center website. The data are generated in ArcGIS using Spatial Analyst and the Benthic Terrain Modeler (BTM). Bathymetric Position Index (BPI) is a second order derivative of bathymetry. The derivation evaluates elevation differences between a focal point and the mean elevation of the surrounding cells within a user defined annulus or circle. A negative value represents a cell that is lower than its neighboring cells (depressions) and a positive value represents a cell that is higher than its neighboring cells (crests). Larger numbers represent more prominent features on the seafloor, which differ greatly from surrounding areas. Flat areas or areas with a constant slope produce near-zero values. (Lundblad et al. 2006) Benthic Terrain Modeler for ArcGIS Environmental Systems Research Institute, Inc. (ESRI) https://www.arcgis.com/home/item.html?id=b0d0be66fd33440d97e8c83d220e7926 Lundblad, E.R. et al. 2006. A Benthic Terrain Classification Scheme for American Samoa. Marine Geodesy, 29:89-111. Marine Geodesy 2006-02-26 http://dx.doi.org/10.1080/01490410600738021 12616 Data Set Cross Reference 32811 Data Set Cross Reference 12618 Data Set Cross Reference 35021 Data Set Cross Reference 31636 Data Set Cross Reference 12615 Data Set Cross Reference 33579 Data Set Cross Reference 12614 Data Set Cross Reference gov.noaa.nmfs.inport:12617 Annette DesRochers 2012-07-12T21:50:56 Lori Luers 2026-06-17T18:22:30 2017-03-13 Pacific Islands Fisheries Science Center PIFSC 1845 Wasp Blvd. Honolulu HI 96818 USA 808-725-5300 https://www.pifsc.noaa.gov 8:00 a.m. - 4:30 p.m. 1001 Public No No 2017-03-13 1 Year 2018-03-13