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Dataset Overview | National Centers for Environmental Information (NCEI)

NCCOS mapping: seafloor mapping products for Kachemak Bay, Cook Inlet, AK, from 2005-07-06 to 2017-07-19 (NCEI Accession 0209109)

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This dataset contains seafloor mapping data from hydrographic multibeam sonar surveys, a thematic benthic habitat map created from these multibeam sonar surveys, and georeferenced benthic photographs and video clips, all collected in and around Kachemak Bay, Alaska. The multibeam dataset contains the bathymetric data collected by NOAA Ship Fairweather and NOAA Ship Rainier in the summers of 2008 and 2009. Underwater videos for ground validation were acquired during the field missions of July 2016 and July 2017 aboard R/V Edgecumbe. An additional seagrass map, generated by manual interpretation of air photos captured in 2005, is also included, as are the air photos.
  • Cite as: Field, Don; Malhotra, Amit; Holderied, Kris; Taylor, Chris (2020). NCCOS mapping: seafloor mapping products for Kachemak Bay, Cook Inlet, AK, from 2005-07-06 to 2017-07-19 (NCEI Accession 0209109). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/2nha-4780. Accessed [date].
gov.noaa.nodc:0209109
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Distribution Formats
  • Shapefile
    • File Specification: .SHP and ancillary files: .CPG, .DBF, .PRJ, .SBN, .SBX, .SHP, .XML, .SHX
  • JPEG
  • GeoTIFF
    • File Specification: .TIF (and ancillary files .TFW, .AUX, .XML, .OVR)
  • MP4
    • File Specification: (Sartek (720p) and GoPro (1080p) video)
  • PDF
  • ODS
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Distributor NOAA National Centers for Environmental Information
+1-301-713-3277
NCEI.Info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 2005-07-06 to 2017-07-19
Spatial Bounding Box Coordinates
West: -151.971995
East: -151.01898
South: 59.328606
North: 59.758568
Spatial Coverage Map
General Documentation
Associated Resources
Publication Dates
  • publication: 2020-03-10
  • revision: 2020-04-04
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
Data Update Frequency As needed
Supplemental Information
In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number.
Purpose Kachemak Bay estuarine and marine habitats are used by halibut, other groundfish, all five species of Pacific salmon, and shellfish (crab and bivalves). These species support commercial, recreational and subsistence harvests. Kachemak Bay is also used by marine mammal and seabird species under NOAA (whales, seals, sea lions) and U.S. Fish and Wildlife Service (FWS) (sea otters, seabirds) management. Kachemak Bay and Cook Inlet have experienced past crashes and lack of recovery in crab and herring populations and are currently experiencing significant declines in halibut, king salmon and clam populations which have reduced harvests and adversely affected the local economy and subsistence use. Improved geospatial data on benthic and intertidal habitats is needed by FWS and Alaska Department of Fish and Game resource managers, for NOAA and Alaska Department of Natural Resources permit decisions, and for U.S. Bureau of Ocean Energy Management (BOEM) environmental analysis needs for newly proposed oil and gas lease sales in the region. Before this project, there were no subtidal benthic habitat maps of Kachemak Bay to support essential fish habitat and other resource management needs. The main objectives of this NOAA National Centers for Coastal Ocean Science (NCCOS) project were to produce the first benthic habitat map for the area, and assess, and transition existing data into an accessible map interface to inform management decisions while preparing the users in the area for future issues. The corrected bathymetry base surface was used to interpret the seafloor topography habitat types.
Use Limitations
  • accessLevel: Public
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Dataset Citation
  • Cite as: Field, Don; Malhotra, Amit; Holderied, Kris; Taylor, Chris (2020). NCCOS mapping: seafloor mapping products for Kachemak Bay, Cook Inlet, AK, from 2005-07-06 to 2017-07-19 (NCEI Accession 0209109). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/2nha-4780. Accessed [date].
Cited Authors
Principal Investigators
Collaborators
Contributors
Resource Providers
Points of Contact
Publishers
Acknowledgments
  • Related Funding Agency: US DOC; NOAA; NMFS; Office of Habitat Conservation; Habitat Blueprint; Habitat Focus Areas
  • Related Funding Agency: NOAA National Centers for Coastal Ocean Science
  • Partner: US DOI; U.S. Fish and Wildlife Service (FWS)
  • Partner: University of Alaska Anchorage
  • Partner: Alaska Department of Fish and Game (ADFG), Commercial Fisheries Division
  • Partner: Alaska Department of Fish and Game (ADFG), Sport Fisheries Division
  • Partner: Native Village of Nanwalek Tribe
  • Partner: Seldovia Village Tribe
  • Partner: The Kachemak Bay National Estuarine Research Reserve
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords NCCOS Keywords
  • NCCOS Research Priority > Marine Spatial Ecology
  • NCCOS Research Topic > Habitat Mapping
NCCOS Research Data Type
  • NCCOS Research Data Type > Derived Data Product
  • NCCOS Research Data Type > Field Observation
  • NCCOS Research Data Type > Geospatial
Provider Keywords
  • Seagrass Classification
  • Video Data
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Platform keywords NODC PLATFORM NAMES THESAURUS Global Change Master Directory (GCMD) Platform Keywords ICES/SeaDataNet Ship Codes Provider Platform Keywords
  • NOAA R/V Edgecumbe
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords Provider Instruments
  • Models/Analyses > Data Analysis > Environmental Modeling
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords NCCOS Research Location
  • NCCOS Research Location > Region > Pacific Ocean
  • NCCOS Research Location > U.S. States and Territories > Alaska
Provider Research Location
  • Coastal Ocean
  • Cook Inlet Alaska
  • Kachemak Bay Alaska
  • Kachemak Bay National Estuarine Research Reserve
Project keywords NCCOS Project Keywords
  • NCCOS Project #308: Developing Spatial Products for Kachemak Bay Habitat Focus Area to Support Place Based Management Needs
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Field, Don; Malhotra, Amit; Holderied, Kris; Taylor, Chris (2020). NCCOS mapping: seafloor mapping products for Kachemak Bay, Cook Inlet, AK, from 2005-07-06 to 2017-07-19 (NCEI Accession 0209109). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/2nha-4780. Accessed [date].
Access Constraints
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Fees
  • In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Processing Steps
  • 2020-03-10T20:32:45Z - NCEI Accession 0209109 v1.1 was published.
  • 2020-04-04T00:41:13Z - NCEI Accession 0209109 was revised and v2.2 was published.
    Rationale: Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.
Output Datasets
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: BATHYMETRY (measured); Units: meter; Observation Category: in situ; Sampling Instrument: multibeam sonar; Sampling and Analyzing Method: Measurement of the seabed elevation. The data were collected using multibeam echosounders (MBES; Reson 7125, 8101, and 8125) and processed by NOS using Caris software. The raw sounding and beam form were combined to create a mosaic of the survey area. Data were manually edited for constantly of intensity over the two cruise years and sampling systems.; Data Quality Method: The minimum standards for multibeam echo sounder sonar system resolution are set forth under 1a in the "IHO Standards for Hydrographic Surveys", 2008. The surfaces produced in CARIS that were used for producing BAGs and GeoTIFFs use the IHO S-44 Special Order..
  • Parameter or Variable: HABITAT - BENTHIC (calculated); Units: none; Observation Category: model output; Sampling Instrument: Models/Analyses > Data Analysis > Environmental Modeling; Sampling and Analyzing Method: This data set is a thematic map, a benthic habitat classification. Multibeam echosounder data was classified into numerous subclasses of unconsolidated sediment and rock. The benthic habitat map was generated using a combination of automated image processing techniques in the eCognition software package and heads up, on-screen editing. Underwater video collected during field missions in July 2016 and July 2017 was used as training data to create the map.; Data Quality Method: The classification was checked against the 510 underwater videos collected in 2016 and 2017 to ensure the classification corresponded as closely as possible to the benthos identified in the videos..
  • Parameter or Variable: Seagrass Classification (calculated); Units: none; Observation Category: model output; Sampling Instrument: Models/Analyses > Data Analysis > Environmental Modeling; Sampling and Analyzing Method: This data set is a thematic map, a classification of seagrass occurrence. Aerial photographs were interpreted, classifying seagrass as dense or patchy. Underwater video, and data collected on foot during low tides during field missions in June and August 2005 was used as training data to create the map.; Data Quality Method: The classification was checked against the 224 underwater videos collected in 2005 to ensure the classification corresponded as closely as possible to the benthos identified in the videos..
Acquisition Information (collection)
Instrument
  • multibeam sonar
  • video camera
Platform
  • NOAA Ship Fairweather
  • NOAA Ship Rainier
Last Modified: 2024-06-10T13:09:00Z
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