Bathymetry of the Aleutian and Bowers Basin, Bering Sea

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Frequently anticipated questions:

What does this data set describe?

Title: Bathymetry of the Aleutian and Bowers Basin, Bering Sea
Abstract:
This coverage contains bathymetric contours for Aleutian Basin and Bowers Basin east of the 1867 Convention Line in the southwestern Bering Sea. Geographic extent of this file is: 51.7 : 62.0 N / -165.1 W : 170.0 E. Bathymetric contours range from 50 m to 6400 m. This coverage was used to display the bathymetry for the Atlas of the U.S. Exclusive Economic Zone, Bering Sea, U.S. Geological Survey Misc. Investigations Series I-2053, 1991 (also known as the GLORIA survey). The map was published separately by Hall and others, 1989, U.S. Geological Survey Open-file Report 89-548.
Supplemental_Information:
The USGS Alaska Science Center created this and other digital bathymetry coverages to support marine animal research in the Bering and Chukchi Seas. The completed coverages are being stored on the Coastal and Marine Geoscience Data System (CMGDS) for archival purposes only. The coverage "Bathymetry of the Aleutian and Bowers Basins, Bering Sea" is titled ALEUTBAS_2GEO (aleutbas=aleutian basin, 2=geometry only; geo=geographic projection)
  1. How might this data set be cited?
    U.S. Geological Survey, 19970430, Bathymetry of the Aleutian and Bowers Basin, Bering Sea: U.S. Geological Survey, Anchorage, Alaska.

    Online Links:

    Other_Citation_Details:
    Citation of source map: Hall, R.K., Karl, H.A., Carlson, P.R., Cooper, A.K., Gardner, J.V., Hunter, R.E., Marlow, M.S., and Stevenson, A.J., 1989, Bathymetric map of the Aleutian Basin and Bowers Basin east of the U.S.-U.S.S.R. 1867 Convention Line, Bering Sea: U.S. Geological Survey Open-File Report 89-548, 6 pp, 1 map, scale 1:2,000,000
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: 170
    East_Bounding_Coordinate: -165.1
    North_Bounding_Coordinate: 62
    South_Bounding_Coordinate: 51.7
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1989
    Currentness_Reference:
    map publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: vector digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      Indirect_Spatial_Reference: Bathymetric contours
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • String (1926)
      • Entity point (4)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.0020000000949949026. Longitudes are given to the nearest 0.0020000000949949026. Latitude and longitude values are specified in Decimal Degrees. The horizontal datum used is D North American 1927 (assumed).
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.9786982.
      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: No correction
      Depth_Resolution: 100
      Depth_Distance_Units: meters, both 10m and 100m contours are represented
      Depth_Encoding_Method: Attribute values
  7. How does the data set describe geographic features?
    aleutbas_3geo.aat
    Bathymetry of the Aleutian and Bowers Basins, Bering Sea Arc Attribute Table (arcs) (Source: USGS; ESRI)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    FNODE#
    Internal node number for the beginning of an arc (from-node). (Source: ESRI) Whole numbers that are automatically generated.
    TNODE#
    Internal node number for the end of an arc (to-node). (Source: ESRI) Whole numbers that are automatically generated.
    LPOLY#
    Internal node number for the left polygon. (Source: ESRI) Whole numbers that are automatically generated.
    RPOLY#
    Internal node number for the right polygon. (Source: ESRI) Whole numbers that are automatically generated.
    LENGTH
    Length of feature in internal units. (Source: ESRI) Positive real numbers that are automatically generated.
    ALEUTBAS#
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    ALEUTBAS-ID
    User-defined feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    LTYPE
    Line type. (Source: USGS)
    ValueDefinition
    lineline
    INCREM
    Depth bathymetric contour lines. Contours range from 50 to 6400 meters. From 50 to 150 m the contour interval is 10 m; from 200 to 6400 m the contour interval is 100 m; there is also a contour interval at 175 m. (Source: USGS)
    Range of values
    Minimum:50
    Maximum:6400
    Units:meters

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • U.S. Geological Survey
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey
    Attn: Florence Wong
    U.S. Geological Survey
    Menlo Park, CA
    USA

    650-329-5327 (voice)
    650-329-5299 (FAX)
    fwong@usgs.gov
    Hours_of_Service: 8:00 am to 4:00pm Monday through Friday
    Contact_Instructions: None

Why was the data set created?

To provide high quality bathymetric contours of the Aleutian and Bowers Basins for marine mammal and sea bird research.

How was the data set created?

  1. From what previous works were the data drawn?
    USGS_aleutbas (source 1 of 1)
    U.S. Geological Survey, 1989, Bathymetric map of the Aleutian Basin and Bowers Basin east of the U.S.-U.S.S.R. 1867 Convention Line, Bering Sea.: Open-File Report 89-548, U.S. Geological Survey, Menlo Park, CA.

    Type_of_Source_Media: Map
    Source_Contribution:
    The map provided the bathymetric contours for the digitized vector data
  2. How were the data generated, processed, and modified?
    Date: 1995 (process 1 of 4)
    Original bathymetric data were collected during the EEZ-SCAN surveys in 1986-87 w/ a 10kHz high-resolution bottom profiler. Prior to the EEZ-SCAN cruises, bathymetric maps were prepared from existing data sets. The digitized bathymetry from the published and unpublished maps were plotted on a common base and the uncorrected 10kHz water depth values from the EEZ-SCAN surveys were overlayed on this base. Because of the high quality of the data, the digital data from the EEZ-SCAN cruises were weighted more than the previously published maps when repositioning contour lines (from Hall et al. 1989). The resulting bathymetry coverage was converted to Arc/INFO from a Navplot polygon file by Florence Wong in July 1995. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Florence Wong
    U.S. Geological Survey
    Menlo Park, CA
    USA

    650-329-5327 (voice)
    650-329-5299 (FAX)
    fwong@usgs.gov
    Hours_of_Service: 8:00 am to 4:00pm Monday through Friday
    Contact_Instructions: None
    Data sources used in this process:
    • USGS_aleutbas
    Date: 14-Feb-2017 (process 2 of 4)
    Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Alan O. Allwardt
    Contractor -- Information Specialist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7551 (voice)
    831-427-4748 (FAX)
    aallwardt@usgs.gov
    Date: 19-Oct-2020 (process 3 of 4)
    Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 18-Nov-2021 (process 4 of 4)
    Edited metadata to fix validation errors and to bring it up to FGDC CSDGM current standards based on data release policies for USGS Coastal and Marine Hazards and Resources Program (CMHRP). No data were changed. The metadata available from a harvester may supersede metadata bundled within a download file. Users are advised to compare the metadata dates to determine which metadata file is most recent. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Susan Cochran
    Geologist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7545 (voice)
    scochran@usgs.gov
  3. What similar or related data should the user be aware of?
    Service, National Ocean, and U.S. Department of Commerce, Unknown, Coastal Shelf Bathymetry of the Bering, Chukchi, and Beaufort Seas: Department of Commerce, NOAA, NOS, Washington, D.C..

    Other_Citation_Details:
    Bathymetric maps available for purchase from National Geophysical Data Center, E/GC3, 325 Broadway, Boulder, Colorado 80303-3228.
    U.S. Geological Survey, 1976, Plate 1. Topographic and Bathymetric Map of the Northern Bering Sea Region: U.S. Geological Survey Professional Paper 759-B, U.S. Government Printing Office, Washington, D.C..

    Other_Citation_Details:
    Hopkins, D.M., Nelson, C.H., Perry, R.B., and Alpha, T.R., 1976, Physiographic subdivisions of the Chirikov Basin, Northern Bering Sea (studies on the marine geology of the Bering Sea): Geological Survey Professional Paper 759-B, U.S. Government Printing Office, 7 pp, 3 plates.
    Geological Society of America, 1974, Bathymetric Map of the Bering Sea: Geological Society of America, Boulder, CO.

    Other_Citation_Details:
    Pratt, R., and Walton, F., 1974, Bathymetric map of the Bering Sea: The Geological Society of America, Boulder, CO.
    U.S. Geological Survey, 1984, Bathymetric map of the Chukchi Sea: Miscellaneous Investigations Series Map I-1182-D, U.S. Geological Survey, Washington, D.C..

    Other_Citation_Details:
    Hill, E.R., Grantz, A., May, S.D., and Smith, M., 1984, Bathymetric map of the Chukchi Sea: U.S. Geological Survey, Miscellaneous Investigations Series I-1182-D.
    U.S. Geological Survey, 1976, Bathymetric map of the Chukchi Sea and Arctic Ocean -and- Bathymetric map of the Aleutian Trench and Bering Sea: Open-File Report 76-821 and 76-823, U.S. Geological Survey, Washington, D.C..

    Other_Citation_Details:
    Schumacher, G.M., 1976, Bathymetric map of the Chukchi Sea and Arctic Ocean: U.S. Geological Survey Open-File Report 76-823 -and- Schumacher, G.M., 1976, Bathymetric map of the Aleutian Trench and Bering Sea: U.S. Geological Survey Open-File Report 76-821.

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    Contact U.S. Geological Survey in Menlo Park, CA.
  2. How accurate are the geographic locations?
    Contact U.S. Geological Survey in Menlo Park, CA.
  3. How accurate are the heights or depths?
    Contact U.S. Geological Survey in Menlo Park, CA.
  4. Where are the gaps in the data? What is missing?
    Contact U.S. Geological Survey in Menlo Park, CA.
  5. How consistent are the relationships among the observations, including topology?
    Contact U.S. Geological Survey in Menlo Park, CA.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None
Use_Constraints:
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. Not to be used for navigational purposes.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    Attn: Florence Wong
    U.S. Geological Survey
    Menlo Park, CA
    USA

    650-329-5327 (voice)
    650-329-5299 (FAX)
    fwong@usgs.gov
    Hours_of_Service: 8:00 am to 4:00pm Monday through Friday
    Contact_Instructions: None
  2. What's the catalog number I need to order this data set?
  3. What legal disclaimers am I supposed to read?
    Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS) no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from USGS server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The USGS shall not be held liable for improper or incorrect use of the data described and/or contained herein
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 18-Nov-2021
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: PCMSC Science Data Coordinator
2885 Mission Street
Santa Cruz, CA

831-427-4747 (voice)
pcmsc_data@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/AlaskaScienceCtr/aleutbas_metadata.faq.html>
Generated by mp version 2.9.50 on Fri Nov 19 13:02:53 2021