gov.noaa.nmfs.inport:47577 eng UTF8 dataset GIS dataset of raster files Pacific Islands Fisheries Science Center 808-725-5300 1845 Wasp Blvd. Honolulu HI 96818 USA https://www.pifsc.noaa.gov WWW:LINK-1.0-http--link Website Website for this organization information 8:00 a.m. - 4:30 p.m. resourceProvider Akridge, Michael W (808)725-5483 1845 Wasp Blvd. Honolulu HI 96818 USA michael.akridge@noaa.gov pointOfContact 2025-12-03T01:00:28 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) Gridded multibeam bathymetry of Guam Island, Guam U.S. Territory Multibeam: Marianas, Guam 60m 2017-11-01 publication NOAA/NMFS/EDM 47577 https://www.fisheries.noaa.gov/inport/item/47577 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information Pacific Islands Fisheries Science Center 808-725-5360 1845 Wasp Blvd. Honolulu HI 96818 USA pifsc.info@noaa.gov https://www.pifsc.noaa.gov WWW:LINK-1.0-http--link Pacific Islands Fisheries Science Center Website Pacific Island Fisheries Science Center homepage information 8:00 a.m. - 4:30 p.m. originator https://www.pifsc.noaa.gov/cred/ WWW:LINK-1.0-http--link Citation URL Coral Reef Ecosystem Program website download https://www.soest.hawaii.edu/pibhmc WWW:LINK-1.0-http--link PIBHMC Pacific Islands Benthic Habitat Mapping Center website download mapDigital Gridded bathymetry at 60m resolution surrounding Guam Island, Guam U.S. Territory. Bottom coverage was achieved in depths between 0 and ~3500 meters. The Arc ASCII grids and floating point geotifs include multibeam bathymetry data acquired over multiple surveys by the NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division (as of May 2017). The data were acquired using the Simrad EM300, and Reson 8101 multibeam sonars, with sonar frequencies of 30 and 240 kHz respectively. The 60m grid is mosaiced from data sets acquired in 2003, 2007, 2010 and 2017. These ASCII and floating point grids were created using data gathered from multibeam soundings for use as a planning and reference document. The data are also being used for benthic habitat mapping, for locating essential fish habitat (as defined by NOAA Fisheries), and for studying geologic features of the area. Refer to supplemental information for description of instrument and survey. PIFSC Ecosystem Sciences Division completed Akridge, Michael W (808)725-5483 1845 Wasp Blvd. Honolulu HI 96818 USA michael.akridge@noaa.gov pointOfContact Akridge, Michael W (808)725-5483 1845 Wasp Blvd. Honolulu HI 96818 USA michael.akridge@noaa.gov custodian asNeeded https://www.soest.hawaii.edu/pibhmc/data_all/cnmi-guam/bathymetry/Guam_60m.jpg Multibeam Bathymetry JPEG 1217 M218 Benthic Habitat Mapping and Characterization in the Pacific Islands Region theme CRCP Project Geographic Information > Bathymetry theme CoRIS Discovery Thesaurus EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs theme CoRIS Theme Thesaurus BATHYMETRY water depth theme NODC DATA TYPES THESAURUS GIS product theme NODC OBSERVATION TYPES THESAURUS HI'IALAKAI OSCAR ELTON SETTE theme NODC PLATFORM NAMES THESAURUS Coral Reef Conservation Program theme NODC PROJECT NAMES THESAURUS US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division; Coral Reef Ecosystem Program theme NODC SUBMITTING INSTITUTION NAMES THESAURUS COUNTRY/TERRITORY > United States of America > Guam > Guam (13N144E0000) OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Guam (13N144E0000) place CoRIS Place Thesaurus Guam place CoRIS Region NW Pacific place NODC SEA AREA NAMES THESAURUS SEA FLOOR stratum Global Change Master Directory CRED CREP Coral Reef Ecosystem Division Coral Reef Ecosystem Program ESD Ecosystem Sciences Division PIBHMC PIFSC Pacific Islands Benthic Habitat Mapping Center Pacific Islands Fisheries Science Center multibeam seafloor elevation theme Mariana Islands Marianas Territory of Guam place DOC/NOAA/NMFS/PIFSC > Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Bathymetry project InPort otherRestrictions Cite As: Pacific Islands Fisheries Science Center, [Date of Access]: Gridded multibeam bathymetry of Guam Island, Guam U.S. Territory [Data Date Range], https://www.fisheries.noaa.gov/inport/item/47577. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: none otherRestrictions Use Constraints: These data are not to be used for navigation purposes. Please cite NOAA Ecosystem Sciences Division (ESD) when using the data. Suggested citation: Ecosystem Sciences Division; Pacific Islands Fisheries Science Center (2017). Gridded multibeam bathymetry of Guam Island, Guam U.S. Territory. https://www.fisheries.noaa.gov/inport/item/47577 otherRestrictions Distribution Liability: 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. unclassified Not applicable Not applicable EM300 Multibeam Sonar Data collected from May 7 to May 22 from NOAA Ship Hi'ialakai cruise HA-17-01 to the Commonwealth of Northern Mariana Islands (CNMI) and Guam in 2017 NOAA/NMFS/EDM 47803 crossReference NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 47577 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/pifsc/dmp/pdf/47577.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference eng; US elevation ArcGIS ASCII and Floating Pt. geotif files both created using a number of processes in QPS Fledermaus and Quimera, as well as ESRI ArcGIS; Windows operating system. Extent of area mapped around the island of Guam between ~0 and ~3500 m. 144.326 145.116 12.761 13.913 Bathymetry collected in 2017 aboard the NOAA Ship Hi'ialakai | Currentness: Ground Condition 2017 Bathymetry collected in 2007 aboard the NOAA Ship Hi'ialakai and R/V AHI | Currentness: Ground Condition 2007 Bathymetry collected in 2010 aboard the NOAA Ship Oscar Elton Sette | Currentness: Ground Condition 2010 Bathymetry collected in 2003 aboard the R/V AHI | Currentness: Ground Condition 2003 Multibeam data were collected aboard the NOAA Ship Hi'ialakai, a 218' NOAA research ship. The NOAA Ship Hi'ialakai's survey sensors include a 30 kHz Simrad EM300 sonar and a 300 kHz Simrad EM3002d sonar, which provide bathymetry and imagery data, a TSS/Applanix POS/MV Model 320, which measures position, velocity, attitude and heading, and a Seabird SBE 9/11 plus CTD used to measure sound velocity profiles. Multibeam data were also 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. The R/V AHI's survey sensors include a 240 kHz RESON 8101-ER sonar providing bathymetry and imagery data, a TSS/Applanix POS/MV Model 320 which measures position, velocity, attitude and heading, and a Seabird SBE 19 CTD used to measure sound velocity profiles. Additional data were collected aboard the NOAA vessel Oscar Elton Sette, a 68 m (224') NOAA research ship. The Oscar Elton Sette deployed an over-the-side pole mounted survey sensors system including a 240 kHz RESON 8101-ER sonar which measures bathymetry and acoustic backscatter imagery, a TSS/Applanix POS/MV Model 320 which measures time, position, velocity, attitude and heading, and a Seabird SBE 19 CTD used to measure sound velocity profiles. Specific equipment configurations are documented in metadata from cruises AHI-03-07, AHI-07-02, HI-07-02, SE-10-02, and HA-17-01. These metadata can be accessed at: https://www.soest.hawaii.edu/pibhmc/cms/cruise-catalog/. false eng false none Zip Zip Akridge, Michael W (808)725-5483 1845 Wasp Blvd. Honolulu HI 96818 USA michael.akridge@noaa.gov distributor https://www.soest.hawaii.edu/pibhmc/data_all/cnmi-guam/bathymetry/guam_60m.asc.zip WWW:LINK-1.0-http--link guam_60m.asc.zip Zip file containing 60-m bathymetry grid in Arc ASCII and Floating Pt. Geotif format for Guam Island download dataset Accuracy Relevant offset, sound velocity, and tidal corrections are applied to the data as part of the processing procedures. Completeness Report Data collected in 2017 were only used to gap fill the existing 60m bathymetry grid from data previously collected (2003-2010). Conceptual Consistency These data are believed to be logically consistent though no tests were performed Process to produce bathymetry grid from source multibeam bathymetry data. As multibeam bathymetry data contributing to grid were acquired over multiple surveys/years, there have been different methods employed to process the data. Generally speaking, data acquired prior to 2015 were treated according to protocol #1, whereas data acquired after 2015 were processed using protocol #2. Protocol 1: Multibeam swath files are acquired in the Generic Sensor Format (GSF) and are edited on a swath by swath basis using SAIC's SABER editing software. The edited swath files are then combined into a Pure File Magic (PFM) format in SABER and area based editing is performed. The edited PFM is then exported as X,Y,Z. The resulting X,Y,Z data are then gridded using xyz2grd, a Generic Mapping Tools (GMT) algorithm that converts an ASCII or binary table to a netCDF grid file format. GMT is an open source collection of tools for manipulating geographic data sets. Grid nodes with more than one value are set to the average value and unconstrained nodes are set to NaN. Finally, the netCDF grid is clipped at a depth that minimizes data gaps for the specified grid cell size and then converted to an ArcGIS ASCII file format using LINUX/UNIX commands in combination with GMT. Protocol 2: Multibeam bathymetry data were acquired in Kongsberg *.all format, and imported into SABER editing software as converted *gsf. Within SABER, relevant offset, sound velocity, and tidal corrections are made prior to exporting *gsf files to QPS Quimera for swath editing. Within Quimera *gsf files are combined to form 60m resolution 'Dynamic Surface'. A medium-tension spline filter is applied to the data, and the Dynamic Surface is progressively corrected as final 2D and 3D direct swath edits are made. The final cleaned surface is exported as a floating point geotif, where in ArcGIS it is merged with the pre-existing 60m resolution grid using the 'Mosaic to new Raster' function. This final combined grid is exported as both ArcGIS ASCII grid and a floating point raster grid. Further information about the multibeam data processing is recorded in the cruise metadata. 2017-09-10T00:00:00 Cruise Metadata: AHI-03-07 Guam Pacific Islands Fisheries Science Center, PIFSC ftp://ftp.soest.hawaii.edu/pibhmc/website/cruisecatalog/cred_guam_ahi0307_mb_metadata.txt WWW:LINK-1.0-http--link Source Citation URL Source Citation URL information Cruise Metadata: AHI-07-02 Guam Pacific Islands Fisheries Science Center, PIFSC ftp://ftp.soest.hawaii.edu/pibhmc/website/cruisecatalog/cred_ahi0702_mb_metadata.txt WWW:LINK-1.0-http--link Source Citation URL Source Citation URL information Cruise Metadata: HA-17-01 Guam Pacific Islands Fisheries Science Center, PIFSC https://www.fisheries.noaa.gov/inport/item/47803 WWW:LINK-1.0-http--link Source Citation URL Source Citation URL information Cruise Metadata: HI-07-02 Guam Pacific Islands Fisheries Science Center, PIFSC ftp://ftp.soest.hawaii.edu/pibhmc/website/cruisecatalog/cred_hi0702_mb_metadata.txt WWW:LINK-1.0-http--link Source Citation URL Source Citation URL information Cruise Metadata: SE-10-02 Guam Pacific Islands Fisheries Science Center, PIFSC ftp://ftp.soest.hawaii.edu/pibhmc/website/cruisecatalog/SE1002_MB_Metadata.txt WWW:LINK-1.0-http--link Source Citation URL Source Citation URL information otherRestrictions otherRestrictions Access Constraints: None | Use Constraints: None