Coastal Bathymetry of the Bering, Chuckhi, and Beaufort Seas

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: Coastal Bathymetry of the Bering, Chuckhi, and Beaufort Seas
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:

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

Other_Citation_Details:

Data source is the National Ocean Service (NOS), U.S. Department of Commerce. Maps available for purchase from National Geophysical Data Center, E/GC3, 325 Broadway, Boulder, Colorado 80303-3228.

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

Description:

Abstract:

Bathymetric contours were generated from soundings collected by National Ocean Service vessels from ~1900 to ~1971. The 1:250,000 maps are available for U.S. coastal waters. Bathymetric contours are in meters, with 10 meter intervals out to 200 m, supplemented by 2 m contours. Beyond 200 m, contours are at 50 m intervals to maximum depth. The GIS database derived from these maps includes the Bering, Chukchi, and Beaufort Seas in western and northern Alaska (~100 maps).

Purpose:

The Bathymetric Map series was developed to provide detailed contours of underwater features. The maps serve as a basic tool for performing scientific, engineering, marine geophysical, and marine environmental studies. The maps were not intended to be used for navigation.

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 Bering Strait: Chukotka to Diomede Island" is titled NOSBATH_3GEO (nos=National Ocean Service, bath=bathymetry, 3=polygon topology, geo=geographic projection)

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1899
Ending_Date: 1971

Currentness_Reference: map publication dates

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -178
East_Bounding_Coordinate: -138
North_Bounding_Coordinate: 74
South_Bounding_Coordinate: 53

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:1f4a4424-aa90-4a42-b08f-9e690023652c

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: Bering Sea
Place_Keyword: Chukchi Sea
Place_Keyword: Beaufort Sea
Place_Keyword: Arctic Ocean

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. Data are not to be used for navigation.

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: 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: 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: 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: 1976
Title:

Bathymetric Map of the Chukchi Sea and Arctic Ocean & bathymetric Map of the Aleutian Trench and Bering Sea

Geospatial_Data_Presentation_Form: Map
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.

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. Accuracy of the source maps is related to the contouring algorithm used to derive the contours and changes in bathymetry since the data were collected. The NOS point data near the Aleutian Islands was not well registered with the coastline. Depths up to 30 m crossed the digitized coastline by up to 200 m and were clipped from the final coverage. It is unknown which data were incorrect (digitized coastline or point locations).

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 will snap together and close polygons based on a specified tolerance. If the node is not within the tolerance it is adjusted manually. The tests for logical consistency are performed in Arc/INFO.

Completeness_Report:

Contours were digitized from NOS bathymetric maps (~90%) or generated from NOS bathymetric sounding point data (~10%) where digitizing was difficult and high density point data were available. Contours are at 10 m intervals out to 200 m. Intermediate contours were not included, because many were dangling arcs which could not be used to build polygons. Contours beyond 200 m are available on the source maps, but were not included in the GIS database. The source maps included "holiday areas" where NOS collected no sounding data, and no bathymetric contours or points are available, these areas are defined in the coverage. A 1:250,000 Alaska Department of Natural Resources coastline was added to the coverage to provide a land reference.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Horizontal positional 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 averaged 150 m for the ~100 maps digitized.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: National Ocean Service, Department of Commerce
Publication_Date: Unknown
Title:

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

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.

Type_of_Source_Media: Maps
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1891
Ending_Date: 1971

Source_Currentness_Reference: Map publication date

Source_Citation_Abbreviation: NOS_bath
Source_Contribution:

The maps provided the bathymetric data for generating bathmyetric contours.

Process_Step:

Process_Description:

~100 maps from the NOS Bathymetric Map series were selected to be digitized (work performed by Resource Data, Inc., Anchorage, Alaska). Ocean depth point data from National Ocean Service cruises (a subset of the data used to develop the bathymetric map series) was used to generate contours where the map contours were extremely difficult to digitize. The generated contours were usually similar to the map contours, and where large discrepancies occurred the lines were digitized from the maps and the generated contours removed. Contours were generated in north Bristol Bay, small areas on the northwest side of the Alaska Peninsula, around the eastern Aleutian Islands and St. Paul Island, and a large area from Seward Peninsula to St. Lawrence Island. All other areas were digitized from the NOS maps. Areas where NOS had no bathymetric data (defined by NOS as holiday areas) were blocked and defined as areas with no data, no attempt was made to generate contours in these areas. Small holiday areas occurred along the coast of the Aleutian Islands and Alaska Peninsula, west side of Nushagak Peninsula, north of Hagemeister Island, south side of St. George Island, north side of Nunavak Island, west and north sides of Seward Peninsula and a small pocket in the Beaufort Sea north of Prudhoe Bay. Larger holiday areas occur at the mouth of the Yukon and Kuskokwim Rivers and around the coast of St. Lawrence Island. Additionally, no map is available for the east end of Kotzebue Sound.

Source_Used_Citation_Abbreviation: NOS_bath
Process_Date: 1997

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: 15049

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 10345

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 10344

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 4

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.002
Longitude_Resolution: 0.002
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: Mean Lower Low Water
Depth_Resolution: 10
Depth_Distance_Units: meters
Depth_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: nosbath_3geo.aat
Entity_Type_Definition:

Coastal Bathymetry of the Bering, Chuckhi, and Beaufort Seas 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: NOSBATH#
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: NOSBATH-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: METHODS
Attribute_Definition:

An arc attribute describing the method used to develop contours.

Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: DIGITIZE
Enumerated_Domain_Value_Definition: Countours were digitzed from NOS maps
Enumerated_Domain_Value_Definition_Source: USGS

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: GENERATE
Enumerated_Domain_Value_Definition: Countours were generated from NOS survey point data
Enumerated_Domain_Value_Definition_Source: USGS

Beginning_Date_of_Attribute_Values: 1997
Ending_Date_of_Attribute_Values: 1997

Attribute:

Attribute_Label: ELEVATION
Attribute_Definition:

Depth of bathymetric contour lines, in negative meters. Used to calculate the polygon mid-depth elevation attribute. Arcs used to define the map boundary, holiday areas, and to clip dangling contours to the next shallowest contour are coded 999.

Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -10
Range_Domain_Maximum: -200
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 10

Beginning_Date_of_Attribute_Values: 1900
Ending_Date_of_Attribute_Values: 1970
Attribute_Measurement_Frequency: Irregular

Detailed_Description:

Entity_Type:

Entity_Type_Label: nosbath_3geo.pat
Entity_Type_Definition:

Coastal Bathymetry of the Bering, Chuckhi, and Beaufort Seas 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: NOSBATH#
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: NOSBATH-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: ELEVATION
Attribute_Definition:

Polygon attribute calculated as the mid-point between bounding arcs, eg the elevation between -10 m and -20 m isobaths equals -15 m. Where a bathymetric contour was an "island" and there was no depth information inside the island, the elevation was coded as the bounding contour's depth. Elevations range from -5 to -195 m. Enclosed polygons deeper than 200 m are coded -999. "Holiday areas" with no bathymetric data are coded +999. enclosed polygons outside the map area are coded +998. All land polygons are labeled +5.

Attribute_Definition_Source: USGS
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -5
Range_Domain_Maximum: -195
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 10

Beginning_Date_of_Attribute_Values: 1900
Ending_Date_of_Attribute_Values: 1970
Attribute_Measurement_Frequency: Irregular

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: 13.5

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://cmgds.marine.usgs.gov/data/walrus/nosbath.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 nosbath.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/nosbath_metadata.html>