Coastal Bathymetry of the Bering, Chuckhi, and Beaufort Seas
Dataset Identification:
Resource 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).
Citation
Title Coastal Bathymetry of the Bering, Chuckhi, and Beaufort Seas
publication Date
1997-04-30
presentationForm
mapDigital
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.
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.
Resource language:
eng; USA
Resource progress code:
completed
Resource Maintenance Information
maintenance or update frequency:
notPlanned
Resource Maintenance Information
maintenance or update frequency:
irregular
update scope:
attribute
Resource Maintenance Information
maintenance or update frequency:
irregular
update scope:
attribute
Constraints on resource usage:
Constraints
Use limitation statement:
Although these data have been processed successfully on a computer system at the US 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.
Constraints on resource usage:
Legal Constraints
use constraint:
otherRestrictions
Other constraints
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.
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)
point of contact
-
pointOfContact
organisation Name
Alaska Science Center, Marine and Fresh Water Ecology Branch
Contact information
Telephone
Voice 907-786-3512
Fax 907-786-3636
Address
Biological Resources Division, U.S. Geological Survey1011 E. Tudor Road, Anchorage, Alaska, 99503
Country USA
hoursOfService 8:00 am to 4:00pm Monday through Friday
descriptor Internal node number for the beginning of an arc (from-node).
sequence Identifier
name FNODE#
Band
descriptor Internal node number for the end of an arc (to-node).
sequence Identifier
name TNODE#
Band
descriptor Internal node number for the left polygon.
sequence Identifier
name LPOLY#
Band
descriptor Internal node number for the right polygon.
sequence Identifier
name RPOLY#
Band
descriptor Length of feature in internal units.
sequence Identifier
name LENGTH
Band
descriptor Internal feature number.
sequence Identifier
name NOSBATH#
Band
descriptor User-defined feature number.
sequence Identifier
name NOSBATH-ID
Band
descriptor An arc attribute describing the method used to develop contours.
sequence Identifier
name METHODS
Band
descriptor 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.
sequence Identifier
name ELEVATION
Long Wavelength
-200
Short Wavelength
-10
units
Band
descriptor Internal feature number.
sequence Identifier
name FID
Band
descriptor Feature geometry.
sequence Identifier
name Shape
Band
descriptor Area of feature in internal units squared.
sequence Identifier
name AREA
Band
descriptor Perimeter of feature in internal units.
sequence Identifier
name PERIMETER
Band
descriptor Internal feature number.
sequence Identifier
name NOSBATH#
Band
descriptor User-defined feature number.
sequence Identifier
name NOSBATH-ID
Band
descriptor 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.
descriptor Internal node number for the beginning of an arc (from-node).
sequence Identifier
name FNODE#
Band
descriptor Internal node number for the end of an arc (to-node).
sequence Identifier
name TNODE#
Band
descriptor Internal node number for the left polygon.
sequence Identifier
name LPOLY#
Band
descriptor Internal node number for the right polygon.
sequence Identifier
name RPOLY#
Band
descriptor Length of feature in internal units.
sequence Identifier
name LENGTH
Band
descriptor Internal feature number.
sequence Identifier
name NOSBATH#
Band
descriptor User-defined feature number.
sequence Identifier
name NOSBATH-ID
Band
descriptor An arc attribute describing the method used to develop contours.
sequence Identifier
name METHODS
Band
descriptor 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.
sequence Identifier
name ELEVATION
Long Wavelength
-200
Short Wavelength
-10
units
Band
descriptor Internal feature number.
sequence Identifier
name FID
Band
descriptor Feature geometry.
sequence Identifier
name Shape
Band
descriptor Area of feature in internal units squared.
sequence Identifier
name AREA
Band
descriptor Perimeter of feature in internal units.
sequence Identifier
name PERIMETER
Band
descriptor Internal feature number.
sequence Identifier
name NOSBATH#
Band
descriptor User-defined feature number.
sequence Identifier
name NOSBATH-ID
Band
descriptor 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.
source description
Source Contribution: The maps provided the bathymetric data for generating bathmyetric contours.Source Type Maps
source citation
Title Coastal Shelf Bathymetry of the Bering, Chukchi, and Beaufort Seas
publication Date
9999-01-01
Series
Name Bathymetric Maps
Issue
other Citation Details
Maps available for purchase from National Geophysical Data Center, E/GC3, 325 Broadway, Boulder, Colorado 80303-3228.
cited responsible party
-
publisher
organisation Name
Department of Commerce, NOAA, NOS
Contact information
Address
, Washington, D.C.
cited responsible party
-
originator
organisation Name
National Ocean Service, Department of Commerce
Resource extent
Temporal Extent
1891-01-01
1971-01-01
AbsoluteExternalPositionalAccuracy
name Of Measure Horizontal Positional Accuracy Report
evaluation Method Description
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.
Completeness Commission
evaluation Method Description
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.
Completeness Omission
evaluation Method Description
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.
ConceptualConsistency
measure Description
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.
notes: This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version
FGDC-STD-001-1998) using the 2012-06-20T17:21:00 version of the FGDC RSE to ISO 19115-2 transform.
Metadata Constraints
Legal Constraints
Access Constraints
otherRestrictions
Other constraints
Metadata Access Constraints: None
Metadata Constraints
Legal Constraints
Access Constraints
otherRestrictions
Other constraints
Metadata Use Constraints: None
Metadata Constraints
Security Constraints
Classification
unclassified
Classification
System Department of Defense
Metadata contact
-
pointOfContact
organisation Name
Alaska Science Center, Marine and Fresh Water Ecology Branch
Contact information
Telephone
Voice 907-786-3512
Fax 907-786-3636
Address
1011 E. Tudor Road, Anchorage, Alaska, 99503
Country USA
hoursOfService 8:00am to 4:00pm Monday through Friday
contact Instructions
None
Metadata scope code
dataset
Metadata language
eng; USA
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
standard version:
ISO 19115-2:2009(E)
Metadata record identifier:
f4fe41dc-8ccd-4566-b7f8-7919ecfe74aa
Metadata record format is ISO19139-2 XML (MI_Metadata)