Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 19970430 Title: Chukchi Sea Bathymetry 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: Hill, E. R., A. Grantz, S. D. May, and M. Smith. 1984. Bathymetric map of the Chukchi Sea. U.S. Geological Survey, Misc. Inves. Series I-1182-D. Online_Linkage: https://cmgds.marine.usgs.gov/data/walrus/chukbath.zip Description: Abstract: Bathymetric contours were generated from soundings collected during geophysical surveys conducted by the USGS from 1969 to 1982, and supplemented by data from other sources. The region covered by the map is the Chukchi Sea from the Bering Strait north to the Arctic Ocean, and Point Barrow, Alaska west to Herald Island, Russia. The map stops just east of Wrangel Island, Russia. Bathymetry is in meters, including 10 meter contour intervals from 10 to 100 meters, and 100 meter contour intervals at depths greater than 100 meters. Purpose: The bathymetric map was produced to provide a base for displaying further geophysical and biological data. It was 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 Chukchi Sea" is titled CHUKBATH_3GEO (chuk=chukchi sea, bath=bathymetry, 3=polygon topology, geo=geographic projection) Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1984 Currentness_Reference: map publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -176 East_Bounding_Coordinate: -153 North_Bounding_Coordinate: 74.5 South_Bounding_Coordinate: 65.5 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:fabbdade-7feb-4e1e-84f5-b73fd8243b6a 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: northwest Alaska Place_Keyword: northeast Russia Place_Keyword: Chukchi 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. Not to be used for navigation purposes. 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: 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: 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. 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: Contours were digitized at 10 meter intervals from 10 meters to 100 meters. Several intermediate contours (e.g. 5, 15, 25, etc.) were not digitized, many were dangling arcs which could not be used to build polygons. From 100 meters to 1,000 meters contours were digitized at 100 meter intervals, same as the resolution on the source map. Beyond 1,000 meters, contours were digitized at 1,000 meter intervals, while the map resolution contained 100 meter intervals. A 1:2,000,00 scale coastline (source = digital chart of the world) 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 for this map ranged from 0.02 to 0.09 which are very poor. Reasons for the high errors may include lack of projection information provided on the source map, errors described in the documentation with the source map, creases in the paper, and/or characteristics of paper media. However, the map accurately overlays plots of the Russian and Alaskan coastlines, so we assume that overall error is minimal (see process description below). Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1984 Title: Bathymetric map of the Chukchi Sea. 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. Type_of_Source_Media: Map Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1984 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: USGS_chukbath Source_Contribution: The map provided the bathymetric contours for the digitized vector data Process_Step: Process_Description: The source map was in Polar Stereographic projection, scale 1:1,000,000 at latitude 72 00 N, no central meridian was provided with the source map, and none could be determined. A tic base from a previous digitizing effort of the same map was used because it provided the best accuracy (history of the existing tic base, and why it is relatively accurate, is not available). The source map was hand digitized and registered into Albers 154 projection to match the tic base. After the map was digitized, 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 70 meters, grain 70 meters, dangle 0.1 meters, and fuzzy 0.1 meters. Note that the tolerances are listed in meters and the coverage is in geographic. THESE TOLERANCES SHOULD BE SPECIFIED IN ANY FUTURE BUILD OR CLEAN TO MAINTAIN THE INTEGRITY OF THE COVERAGE. Source_Used_Citation_Abbreviation: USGS_chukbath 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: 751 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 105 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 105 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 20 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 3.53204995917622e-005 Longitude_Resolution: 3.53204995917622e-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: 100 Depth_Distance_Units: meters; 10m and 100m contours are represented Depth_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: chukbath_3geo.aat Entity_Type_Definition: Bathymetric Map of the 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: CHUCKBATH# 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: CHUKBATH-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: chukbath_3geo.pat Entity_Type_Definition: Bathymetric Map of the 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: CHUCKBATH# 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: CHUCKBATH-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 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 bathymetric contours, 8 for arcs added to close polygons, and 9 for the coastline. 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: 0.546 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://cmgds.marine.usgs.gov/data/walrus/chukbath.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 chukbath.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