24303
AFSC/RACE/GAP/Prescott: Norton Sound Bathymetry
AFSC/RACE/GAP/Prescott: Norton Sound Bathymetry
Data Set
Published / External
22291
Groundfish Assessment Program
Project
Completed
2015
We assembled approximately 230,000 National Ocean Service (NOS) bathymetric soundings from 39 lead-line and single-beam echosounder hydrographic surveys conducted from 1896 to 2005 in Norton Sound, Alaska. These bathymetry data are available from the National Geophysical Data Center (NGDC: http://www.ngdc.noaa.gov), which archives and distributes data that were originally collected by the NOS and others. While various bathymetry data have been downloaded previously from NGDC, compiled, and used for a variety of projects, our effort differed in that we compared and corrected the digital bathymetry by studying the original analog source documents - digital versions of the original survey maps, called smooth sheets. Our editing included deleting erroneous and superseded values, digitizing missing values, and properly aligning all data sets to a common, modern datum. We incorporated 3 multibeam surveys, and added an additional 6,992 single-beam soundings from the 2010 Northern Bering Sea bottom trawl survey to fill in where smooth sheet data was lacking. We proofed and digitized 312 cartographic features, comprised mostly of rocks and islets and also digitized 4,305 verbal sediment descriptors, and digitized or adapted 2,142 km of mainland and 837 km of island shoreline.
The purpose for creating this data set was to provide the best available bathymetry and inshore features of Norton Sound for predictive, geospatial modeling of marine resources.
Loaded by FGDC Metadata Uploader, batch 5766, 04-06-2015 12:50
The following FGDC sections are not currently supported in InPort, but were preserved and will be included in the FGDC export:
- Spatial Reference Information (FGDC:spref),
- Spatial Data Organization Information (FGDC:spdoinfo)
- Lineage (FGDC:lineage)
This bathymetry grid was created in several steps. First, the bathymetry point data and inshore smooth sheet features, such as rocks and islets, were compared to the source documents - the smooth sheets - and corrected or digitized. Second, single-beam echobeam data was added to fill in gaps in the smooth sheet coverage. Multibeam surveys were then added, supercededing older smooth sheet data. These data points then combined with shoreline data points and were used to create a Triangulated Irregular Network (TIN). The TIN was converted into a grid (raster with 100 meter square pixels). Finally, the grid was trimmed by the shoreline, removing any points that fell on land.
Theme
ISO 19115 Topic Category
elevation
Theme
ISO 19115 Topic Category
imageryBaseMapsEarthCover
Theme
ISO 19115 Topic Category
oceans
Theme
Alaska
Theme
North Pacific Ocean
Theme
Norton Sound
Theme
bathymetry
Theme
grid
Alaska Fisheries Science Center
Seattle
WA
USA
Data Set
None Planned
Map (digital)
These bathymetry data were proofed, edited and digitized by Megan Prescott and Mark Zimmermann.Funding for much of the work, as part of a Groundfish Assessment Program (GAP), was provided by NOAA's Essential Fish Habitat (EFH), Habitat and Ecological Processes Research (HEPR) through the Alaska NMFS Regional Office. Smooth sheet data was obtained from the Nation Geophysical Data Center (NGDC) website.
N/A
N/A
N/A
Data Steward
2015
Person
Prescott, Megan
megan.prescott@noaa.gov
Distributor
2015
Organization
Alaska Fisheries Science Center
AFSC
afsc.webmaster@noaa.gov
7600 Sand Point Way N.E., Building 4
Seattle
WA
98115
USA
(206) 526-4000
(206) 526-4004
https://www.fisheries.noaa.gov/about/alaska-fisheries-science-center
AKFSC Home Page
Online Resource
0700-1700 Pacific Time
Metadata Contact
2015-04-06
Person
Prescott, Megan
megan.prescott@noaa.gov
Originator
2015-04-06
Person
Prescott, Megan
megan.prescott@noaa.gov
Point of Contact
2015
Person
Prescott, Megan
megan.prescott@noaa.gov
observed
-170
-160.77
65.62
62.75
Norton Sound, Alaska, ranging geographically west to the eastern point of St. Lawrence Island, southeast to the Yukon River delta and north along the Seward Peninsula around to the point of Cape Prince of Wales.
Range
1898
2010
Unclassified
unknown
These data are not to be used for navigation.
These data are not to be used for navigation. These data are not to be used for navigation. We consider this smooth sheet bathymetry, feature, shoreline, and sediment compilation a fairly complete first draft.
These data are not to be used for navigation.
http://www.afsc.noaa.gov/RACE/groundfish/bathymetry/Norton_Sound_bathymetry_grid.zip
https://www.ncei.noaa.gov
http://www.afsc.noaa.gov/RACE/groundfish/bathymetry/Norton_Sound_bathymetry_grid.zip
Online Resource
ZIP
Microsoft Windows 7 Version 6.1 (Build 7600) ; ESRI ArcGIS 10.2.2
Our editing included deleting erroneous and superseded values, digitizing missing values, and properly aligning all data sets to a common, modern datum.
not applicable
Our editing included deleting erroneous and superseded values, digitizing missing values, and properly aligning all data sets to a common, modern datum.
No
Unknown
No
No
Yes
Unknown
NCEI-MD
unknown
IT Security and Contingency Plan for the system establishes procedures and applies to the functions, operations, and resources necessary to recover and restore data as hosted in the Western Regional Support Center in Seattle, Washington, following a disruption.
unknown
gov.noaa.nmfs.inport:24303
Nancy Roberson
2015-04-06T12:49:06
SysAdmin InPortAdmin
2024-01-15T12:08:04
2016-05-18
Alaska Fisheries Science Center
AFSC
7600 Sand Point Way N.E., Building 4
Seattle
WA
98115
USA
http://www.afsc.noaa.gov
0700-1700 Pacific Time
1001
Public
No
2016-05-18
1 Year
2017-05-18
Raster
Grid Cell
3464
4231
Albers Conical Equal Area
55.0
65.0
-154.0
50.0
0.0
0.0
coordinate pair
0.0000000030536018158500163
0.0000000030536018158500163
meters
D North American 1983
GRS 1980
6378137.0
298.257222101
Mean lower low water
0.1
meters
Explicit depth coordinate included with horizontal coordinates