Bathymetric Map of the Bering/Chukchi Sea

Metadata also available as - [Questions & Answers] - [Parseable text] - [XML]

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 19970430
Title: Bathymetric Map of the Bering/Chukchi Sea
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:

Publication_Place: Anchorage, Alaska
Publisher: U.S. Geological Survey

Other_Citation_Details:

Citation of the source map: Schumacher, G. M. 1976. Bathymetric map of the Chukchi Sea and Arctic Ocean. USGS Open-File Report 76-823. Schumacher, G. M. 1976. Bathymetric map of the Aleutian Trench and Bering Sea. USGS Open-File Report 76-821.

Online_Linkage: https://cmgds.marine.usgs.gov/data/walrus/berchuk.zip

Description:

Abstract:

Two bathymetric maps were developed by the U.S. Geological Survey, one for the Chukchi Sea and Arctic Ocean, and one for the Aleutian Trench and Bering Sea. The 2 maps overlap near the Bering Strait. Bathymetric contours were generated from several published sources. It is unclear whether new soundings were collected for these maps. The northern map extends from Wrangel Island, Russia to MacKenzie Bay, Canada, and north to 76 N latitude. The southern map extends from Shelikof Bay, Russia, to the western tip of the Alaska Peninsula, USA, and south to 48 N latitude. Bathymetric contours are at 400 meter intervals with 20, 30, 40, 50, 100, and 200 meter contours added. Contours above 50 meters are rare, and never along the Russian coast. Hard-copy maps were published by the USGS in 1976 and digitized by the Alaska Science Center in 1997. In digital format, the 2 maps have been connected where they overlap in the Bering Strait.

Purpose:

The maps were produced to aid in geophysical research and exploration in the Bering and Chukchi Seas.

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 "Bathymetric Map of the Bering/Chukchi Sea" is titled BERCHUK_3GEO (ber=bering sea, chuk=chukchi sea, 3=polygon topology, geo=geographic projection)

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1976

Currentness_Reference: map publication date

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: 154
East_Bounding_Coordinate: -130
North_Bounding_Coordinate: 76
South_Bounding_Coordinate: 48

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:88c8475f-bf4c-4aca-9089-8e6d29279750

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: oceans

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: contours

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: distributions
Theme_Keyword: bathymetry and elevation

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: bathymetry
Theme_Keyword: contouring
Theme_Keyword: computational methods

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: western Alaska
Place_Keyword: eastern Russia
Place_Keyword: Bering Sea
Place_Keyword: Chukchi Sea

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 and Geological Society of America as the originator of the dataset.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Alaska Science Center, Marine and Fresh Water Ecology Branch

Contact_Address:

Address_Type: mailing and physical
Address: Biological Resources Division, U.S. Geological Survey
Address: 1011 E. Tudor Road
City: Anchorage
State_or_Province: Alaska
Postal_Code: 99503
Country: USA

Contact_Voice_Telephone: 907-786-3512
Contact_Facsimile_Telephone: 907-786-3636
Hours_of_Service: 8:00 am to 4:00pm Monday through Friday
Contact_Instructions: None

Native_Data_Set_Environment: Esri Arc/INFO 7.1
Cross_Reference:

Citation_Information:

Originator: National Ocean Service
Originator: U.S. Department of Commerce
Publication_Date: Unknown
Title:

Coastal Shelf Bathymetry of the Bering, Chukchi, and Beaufort Seas

Geospatial_Data_Presentation_Form: Map
Publication_Information:

Publication_Place: Washington, D.C.
Publisher: Department of Commerce, NOAA, NOS

Other_Citation_Details:

Bathymetric maps available for purchase from National Geophysical Data Center, E/GC3, 325 Broadway, Boulder, Colorado 80303-3228.

Cross_Reference:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 1976
Title:

Plate 1. Topographic and Bathymetric Map of the Northern Bering Sea Region

Geospatial_Data_Presentation_Form: Map
Series_Information:

Series_Name: U.S. Geological Survey Professional Paper
Issue_Identification: 759-B

Publication_Information:

Publication_Place: Washington, D.C.
Publisher: U.S. Government Printing Office

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.

Cross_Reference:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 1984
Title: Bathymetric map of the Chukchi Sea
Geospatial_Data_Presentation_Form: Map
Series_Information:

Series_Name: Miscellaneous Investigations Series
Issue_Identification: Map I-1182-D

Publication_Information:

Publication_Place: Washington, D.C.
Publisher: U.S. Geological Survey

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.

Cross_Reference:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 1988
Title:

Bathymetric Map of the Bowers Basin and Aleutian Basin east of the U.S.-U.S.S.R. 1867 Convention Line, Bering Sea

Geospatial_Data_Presentation_Form: Map
Series_Information:

Series_Name: Open-File Report
Issue_Identification: 89-548

Publication_Information:

Publication_Place: Menlo Park, CA
Publisher: U.S. Geological Survey

Other_Citation_Details:

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.

Cross_Reference:

Citation_Information:

Originator: Geological Society of America
Publication_Date: 1974
Title: Bathymetric Map of the Bering Sea
Geospatial_Data_Presentation_Form: Map
Publication_Information:

Publication_Place: Boulder, CO
Publisher: Geological Society of America

Other_Citation_Details:

Pratt, R., and Walton, F., 1974, Bathymetric map of the Bering Sea: The Geological Society of America, Boulder, CO.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Attribute accuracy was tested by manually comparing hard copy plots to the source maps.

Logical_Consistency_Report:

All polygon features are checked for topology using Arc/INFO software. Each polygon begins and ends with a node feature. All nodes are checked for errors so that there are no dangling features. There are no duplicate lines or polygons. All nodes well snap together and close polygons based on a specified tolerance. If the node is not within tolerance it is adjusted manually. The tests for logical consistency are performed in Arc/INFO.

Completeness_Report:

All contours for both maps were digitized at a high level of accuracy. After digitizing was completed , a 1:2,000,000 scale coastline (source = digital chart of the world) was added to the coverage to provide a land reference and complete the nearshore polygons.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Horizontal accuracy was tested using Arc/INFO's RMS errors generated when the digitized map is converted from table inches to real world coordinates. RMS errors ranged from 0.002 to 0.004 during map registration. In addition, the joined maps were displayed with Russian and Alaska coastlines with high accuracy. There are several islands in the Aleutian chain that appear to cross the closest bathymetric contour, a problem that may be related to the resolution and accuracy of the coastline coverage as much as the bathymetry coverage.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 1976
Title: Bathymetric map of the Chukchi Sea and Arctic Ocean.
Series_Information:

Series_Name: Open-File Report
Issue_Identification: 76-821 and 76-823

Publication_Information:

Publication_Place: Washington, D.C.
Publisher: U.S. Geological Survey

Other_Citation_Details:

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

Type_of_Source_Media: Map
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1976

Source_Currentness_Reference: Publication date

Source_Citation_Abbreviation: USGS_berchuk
Source_Contribution:

The map provided the bathymetric contours for the digitized vector data

Process_Step:

Process_Description:

Two separate tic bases were created in Arc/INFO using the generate command with the fishnet option for each map area. The tic bases were projected from geographic to Albers Equal Area (projection of the source maps) and used to register maps for digitizing. Central merideans were located from the source maps' author as -158 for 76-823 and 175 for 76-821. Arcs were hand digitized. The digitized version of 76-823 was projected to a central meridian of 175 to match 76-821 and the maps were appended together. A problem a\occurred with the Arc/INFO software when trying to project across 180 degrees. Arcs that straddled 180 were clipped and had to be manually snapped together. This will be a problem whenever this coverage is reprojected until Arc/INFO resolves the problem in the software. After the map was digitized and projected into geographic, the digital chart of the world coastline (1:2,000,000 scale) was added to provide a land reference and complete the near shore polygons. Processing tolerances were: weed 40 m, grain 40 m, dangle 0.1 m, and fuzzy 0.1 m. Note that the tolerances are listed in meters and the coverage is in geographic. THESE TOLERANCES SHOULD BE SPECIFIED IN ANY FUTURE CLEAN TO MAINTAIN THE INTEGRITY OF THE COVERAGE.

Source_Used_Citation_Abbreviation: USGS_berchuk
Process_Date: 199609
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Alaska Science Center, Marine and Fresh Water Ecology Branch

Contact_Address:

Address_Type: mailing and physical
Address: Biological Resources Division, U.S. Geological Survey
Address: 1011 E. Tudor Road
City: Anchorage
State_or_Province: Alaska
Postal_Code: 99503
Country: USA

Contact_Voice_Telephone: 907-786-3512
Contact_Facsimile_Telephone: 907-786-3636
Hours_of_Service: 8:00 am to 4:00pm Monday through Friday
Contact_Instructions: None

Process_Step:

Process_Description:

Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.

Process_Date: 20170214
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Alan O. Allwardt

Contact_Position: Contractor -- Information Specialist
Contact_Address:

Address_Type: mailing and physical address
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-460-7551
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: aallwardt@usgs.gov

Process_Step:

Process_Description:

Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.

Process_Date: 20201019
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Process_Step:

Process_Description:

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.

Process_Date: 20211118
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Susan Cochran

Contact_Position: Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-460-7545
Contact_Electronic_Mail_Address: scochran@usgs.gov

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference: Bathymetric contours
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 5380

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 460

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 461

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 11

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 4.1101378883467987e-005
Longitude_Resolution: 4.1101378883467987e-005
Geographic_Coordinate_Units: Decimal Degrees

Geodetic_Model:

Horizontal_Datum_Name: D Clarke 1866
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.9786982

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name: No correction
Depth_Resolution: 400
Depth_Distance_Units: meters; 10m, 50m, and 400m contours are represented
Depth_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: berchuk_3geo.aat
Entity_Type_Definition:

Bathymetric Map of the Bering/Chukchi Sea Arc Attribute Table (arcs)

Entity_Type_Definition_Source: USGS; ESRI

Attribute:

Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: FNODE#
Attribute_Definition: Internal node number for the beginning of an arc (from-node).
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain: Whole numbers that are automatically generated.

Attribute:

Attribute_Label: TNODE#
Attribute_Definition: Internal node number for the end of an arc (to-node).
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain: Whole numbers that are automatically generated.

Attribute:

Attribute_Label: LPOLY#
Attribute_Definition: Internal node number for the left polygon.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain: Whole numbers that are automatically generated.

Attribute:

Attribute_Label: RPOLY#
Attribute_Definition: Internal node number for the right polygon.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain: Whole numbers that are automatically generated.

Attribute:

Attribute_Label: LENGTH
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain: Positive real numbers that are automatically generated.

Attribute:

Attribute_Label: BERCHUK#
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: BERCHUK-ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: DEPTH
Attribute_Definition: Depth in meters below sea level for each contour.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 20
Range_Domain_Maximum: 8000
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: CLASS
Attribute_Definition: A categorical variable to define the line type.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Unrepresentable_Domain:

Class=0 for digitized bathymetric contours; class=8 for arcs that were added to close polygons; and class=9 for the Russian and US/Canadian coastlines. There were 2 cases where class 8 arcs were used: (1) when contours ended because adjoining contours were too close, and (2) the box used as the perimeter of the coverage.

Detailed_Description:

Entity_Type:

Entity_Type_Label: berchuk_3geo.pat
Entity_Type_Definition:

Bathymetric Map of the Bering/Chukchi Sea Polygon Attribute Table (polygons)

Entity_Type_Definition_Source: USGS; ESRI

Attribute:

Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: AREA
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain: Positive real numbers that are automatically generated.

Attribute:

Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain: Positive real numbers that are automatically generated.

Attribute:

Attribute_Label: BERCHUK#
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: BERCHUK-ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that were automatically generated.

Attribute:

Attribute_Label: MID_DEPTH
Attribute_Definition:

Polygon attribute calculated as the mid-point between bounding arcs, e.g. mid-depth between 50 and 100 meter contours equals 75 meters, and between 4,000 and 4,400 meter contours is 4,200 meters. Where a bathymetric contour was an "island" and there was no further depth information inside the "island", the mid-depth was coded as the bounding contour's depth.

Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 25
Range_Domain_Maximum: 8000

Overview_Description:

Entity_and_Attribute_Overview:

The coverage contains two attributes pertinent for data analysis and display (depth and mid-depth, and one attribute that specifies the line type (class). Depth is an arc attribute (.aat) that specifies the ocean depth at each contour in meters. Mid-depth is a polygon attribute (.pat) calculated from the depth values of each polygon's bounding contours (e.g. a polygon with bounding contours of 30 m and 40 m would be 35 m). Class displays the type of line, 0 for digitized contours, 9 for the coastline, and 8 for arcs added to close polygons.

Entity_and_Attribute_Detail_Citation: Producer

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Alaska Science Center, Marine and Fresh Water Ecology Branch

Contact_Address:

Address_Type: Mailing and physical
Address: 1011 E. Tudor Road
City: Anchorage
State_or_Province: Alaska
Postal_Code: 99503
Country: USA

Contact_Voice_Telephone: 907-786-3512
Contact_Facsimile_Telephone: 907-786-3636
Hours_of_Service: 8:00am to 4:00pm Monday through Friday
Contact_Instructions: None

Distribution_Liability:

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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ArcInfo Interchange
Format_Version_Number: Version 7.1
File_Decompression_Technique: ArcInfo Interchange file (E00) and Zip (.zip)
Transfer_Size: 4

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://cmgds.marine.usgs.gov/data/walrus/berchuk.zip

Access_Instructions:

Use internet browse or file manager application (such as Windows Explorer) to access the directory (http://cmgds.marine.usgs.gov/data/walrus/) and download berchuk.zip

Fees: None, if obtained online.

Metadata_Reference_Information:

Metadata_Date: 20211118
Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Person: PCMSC Science Data Coordinator

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/AlaskaScienceCtr/berchuk_metadata.html>