U.S. Geological Survey 19970430 vector digital data Anchorage, Alaska U.S. Geological Survey 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 https://cmgds.marine.usgs.gov/data/walrus/aleutbas.zip 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. To provide high quality bathymetric contours of the Aleutian and Bowers Basins for marine mammal and sea bird research. 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) 1989 map publication date Complete None 170 -165.1 62 51.7 USGS Metadata Identifier USGS:ef3e697d-3890-4e78-a8c3-1e725c041dd9 ISO 19115 Topic Category geoscientificInformation oceans None contours Data Categories for Marine Planning distributions bathymetry and elevation USGS Thesaurus bathymetry contouring computational methods None Aleutian Basin Bowers Basin Bering Sea Aleutian Islands Alaska None 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. U.S. Geological Survey Florence Wong mailing and physical

U.S. Geological Survey

345 Middlefield Road

Menlo Park CA 94025 USA 650-329-5327 650-329-5299 fwong@usgs.gov 8:00 am to 4:00pm Monday through Friday None Esri Arc/INFO 7.1 National Ocean Service U.S. Department of Commerce Unknown Map Washington, D.C. Department of Commerce, NOAA, NOS Bathymetric maps available for purchase from National Geophysical Data Center, E/GC3, 325 Broadway, Boulder, Colorado 80303-3228. U.S. Geological Survey 1976 Map U.S. Geological Survey Professional Paper 759-B Washington, D.C. U.S. Government Printing Office 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 Map Boulder, CO Geological Society of America Pratt, R., and Walton, F., 1974, Bathymetric map of the Bering Sea: The Geological Society of America, Boulder, CO. U.S. Geological Survey 1984 Map Miscellaneous Investigations Series Map I-1182-D Washington, D.C. U.S. Geological Survey 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 Map Open-File Report 76-821 and 76-823 Washington, D.C. U.S. Geological Survey 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. Contact U.S. Geological Survey in Menlo Park, CA. Contact U.S. Geological Survey in Menlo Park, CA. Contact U.S. Geological Survey in Menlo Park, CA. Contact U.S. Geological Survey in Menlo Park, CA. Contact U.S. Geological Survey in Menlo Park, CA. U.S. Geological Survey 1989 Open-File Report 89-548 Menlo Park, CA U.S. Geological Survey Map 1989 Publication date USGS_aleutbas The map provided the bathymetric contours for the digitized vector data 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. USGS_aleutbas 1995 U.S. Geological Survey Florence Wong mailing and physical

U.S. Geological Survey

345 Middlefield Road

Menlo Park CA 94025 USA 650-329-5327 650-329-5299 fwong@usgs.gov 8:00 am to 4:00pm Monday through Friday None Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. 20170214 U.S. Geological Survey Alan O. Allwardt Contractor -- Information Specialist mailing and physical address

2885 Mission Street

Santa Cruz CA 95060 831-460-7551 831-427-4748 aallwardt@usgs.gov Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. 20201019 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov 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. 20211118 U.S. Geological Survey Susan Cochran Geologist Mailing and Physical

2885 Mission Street

Santa Cruz CA 95060 831-460-7545 scochran@usgs.gov Bathymetric contours Vector String 1926 Entity point 4 0.0020000000949949026 0.0020000000949949026 Decimal Degrees D North American 1927 (assumed) Clarke 1866 6378206.4 294.9786982 No correction 100 meters, both 10m and 100m contours are represented Attribute values aleutbas_3geo.aat Bathymetry of the Aleutian and Bowers Basins, Bering Sea Arc Attribute Table (arcs) USGS; ESRI FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. FNODE# Internal node number for the beginning of an arc (from-node). ESRI Whole numbers that are automatically generated. TNODE# Internal node number for the end of an arc (to-node). ESRI Whole numbers that are automatically generated. LPOLY# Internal node number for the left polygon. ESRI Whole numbers that are automatically generated. RPOLY# Internal node number for the right polygon. ESRI Whole numbers that are automatically generated. LENGTH Length of feature in internal units. ESRI Positive real numbers that are automatically generated. ALEUTBAS# Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. ALEUTBAS-ID User-defined feature number. ESRI Sequential unique whole numbers that are automatically generated. LTYPE Line type. USGS line line USGS 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. USGS 50 6400 meters U.S. Geological Survey Florence Wong mailing and physical

U.S. Geological Survey

345 Middlefield Road

Menlo Park CA 94025 USA 650-329-5327 650-329-5299 fwong@usgs.gov 8:00 am to 4:00pm Monday through Friday None 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 ArcInfo Interchange Version 7.1 ArcInfo Interchange file (E00) and Zip (.zip) 0.097 https://cmgds.marine.usgs.gov/data/walrus/aleutbas.zip Use internet browse or file manager application (such as Windows Explorer) to access the directory (http://cmgds.marine.usgs.gov/data/walrus/) and download aleutbas.zip None, if obtained online. 20211118 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998