gov.noaa.nmfs.inport:22957 eng UTF8 dataset Alaska Fisheries Science Center 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA https://www.afsc.noaa.gov WWW:LINK-1.0-http--link Website Website for this organization information 0700-1700 Pacific Time resourceProvider Prescott, Megan megan.prescott@noaa.gov pointOfContact 2026-03-04T19:17:17 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) AFSC/RACE/GAP/Prescott: Central Gulf of Alaska Multibeam Survey H11114 AFSC/RACE/GAP/Prescott: Central Gulf of Alaska Multibeam Survey H11114 2015 publication NOAA/NMFS/EDM 22957 https://www.fisheries.noaa.gov/inport/item/22957 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information Prescott, Megan megan.prescott@noaa.gov originator https://www.afsc.noaa.gov/RACE/groundfish/bathymetry/CGOA_H11114.zip WWW:LINK-1.0-http--link Citation URL Online Resource download We assembled 1.75 million National Ocean Service (NOS) bathymetric soundings from 225 lead-line and single-beam echosounder hydrographic surveys conducted from 1901 to 1999 in the central Gulf of Alaska. These bathymetry data are available from the National Geophysical Data Center (NGDC: http://www.ngdc.noaa.gov), which archives and distributes data that were originally collected by the NOS and others. While various bathymetry data have been downloaded previously from NGDC, compiled, and used for a variety of projects, our effort differed in that we compared and corrected the digital bathymetry by studying the original analog source documents - digital versions of the original survey maps, called smooth sheets. There were several areas where these older surveys were superseded by more recent, higher quality multibeam surveys, mostly from the NOS (n=106). Three of these were unprocessed NOS multibeam surveys in the Sitka area, which we edited and processed into final bathymetric surfaces. We reduced the resolution of these multibeam surveys to 100 m, since some may have sub-meter resolution and many exceed a million soundings, and added them to our bathymetry compilation. In Sitka Sound was missing survey H11114. Processing and adding its bathymetric data to our compilation filled in a substantial gap in Sitka area, between Kruzof and Krestof islands. The purpose for creating this coverage was to fill in gaps with previously unprocessed multibeam data set, that were missing in the central Gulf of Alaska data set. Combined with other bathymetric data in the region this work is useful for predictive, geospatial modeling of marine resources. This multibeam bathymetry was processed by Megan Prescott. Funding for much of the work was provided by NOAA's Essential Fish Habitat (EFH), Habitat and Ecological Processes Research (HEPR) through the Alaska NMFS Regional Office. B. McMahon, G. Nelson (retired) and especially C. Barry (Pacific Hydrographic Branch of the NOS) provided assistance with interpreting smooth sheets, bathymetric sounding files, and descriptive reports. D. Doyle and J. Benson provided valuable datum and GIS advice, respectively. D. Fischman, G. Glover, J.A. Bunn, J. Campagnoli, M. Frydrych, and M. Cole from the National Geophysical Data Center helped with accessing smooth sheets on the NGDC web site. completed Prescott, Megan megan.prescott@noaa.gov pointOfContact Prescott, Megan megan.prescott@noaa.gov custodian notPlanned Alaska Gulf of Alaska North Pacific Ocean bathymetry point theme DOC/NOAA/NMFS/AFSC > Alaska 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 Groundfish Assessment Program project InPort otherRestrictions Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/RACE/GAP/Prescott: Central Gulf of Alaska Multibeam Survey H11114 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/22957. 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: These data are not to be used for navigation. otherRestrictions Use Constraints: These data are not to be used for navigation. We consider this bathymetry compilation a fairly complete first draft and sufficient in quality for addition to the central Gulf of Alaska bathymetry compilation. unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 22957 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/22957.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 imageryBaseMapsEarthCover oceans Microsoft Windows 7 Version 6.1 (Build 7600) ; ESRI ArcGIS 10.0.0 ; CARIS HIPS and SIPS 7.1 -135.63 -135.51 57.13 57.23 A 65.94 km2 region in Sitka Sound, between Kruzof and Krestof islands. | Currentness: observed 2004 2004 Alaska Fisheries Science Center (206) 526-4000 (206) 526-4004 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA afsc.webmaster@noaa.gov https://www.fisheries.noaa.gov/about/alaska-fisheries-science-center WWW:LINK-1.0-http--link Alaska Fisheries Science Center Website AKFSC Home Page information 0700-1700 Pacific Time distributor https://www.afsc.noaa.gov/RACE/groundfish/bathymetry/CGOA_H11114.zip WWW:LINK-1.0-http--link https://www.afsc.noaa.gov/RACE/groundfish/bathymetry/CGOA_H11114.zip download https://www.ncei.noaa.gov WWW:LINK-1.0-http--link https://www.ncei.noaa.gov download dataset Completeness Report Processing followed guidelines laid out by NGDC in the Data Aquisition and Processing Report (http://surveys.ngdc.noaa.gov/mgg/NOS/DAPRs/OPR-O112-RA-04_DAPR.pdf), in order to provide comparable work. It was carried out in Caris Hips and Sips 7.1 then exported into ArcGIS 10.0.0, to be added to our additional smooth sheet and multibeam data. Conceptual Consistency not applicable unknown otherRestrictions Use Constraints: These data are not to be used for navigation.