AFSC/RACE/GAP/Zimmermann: Central Gulf of Alaska Bathymetry Features
Data Set (DS) | Alaska Fisheries Science Center (AFSC)GUID: gov.noaa.nmfs.inport:22903 | Updated: January 15, 2024 | Published / External
Item Identification
Title: | AFSC/RACE/GAP/Zimmermann: Central Gulf of Alaska Bathymetry Features |
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Short Name: | AFSC/RACE/GAP/Zimmermann: Central Gulf of Alaska Bathymetry Features |
Status: | Completed |
Publication Date: | 2015 |
Abstract: |
We assembled 1.75 million National Ocean Service (NOS) bathymetric soundings from 225 lead-line and single-beam echosounder hydrographic surveys conducted from 1901 to 1999 in the central Gulf of 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 Our editing included deleting erroneous and superseded values, digitizing missing values, and properly aligning all data sets to a common, modern datum. There were several areas where these older surveys were superseded by more recent, higher quality multibeam surveys, mostly from the NOS (n=106). Three of these were unprocessed NOS multibeam surveys in the Sitka area, which we edited and processed into final bathymetric surfaces. We reduced the resolution of these multibeam surveys to 100 m, since some may have sub-meter resolution and many exceed a million soundings, and added them to our bathymetry compilation. We proofed, edited or digitized 96,000 cartographic features (mostly from the smooth sheets, some from the multibeam surveys), such as rocky reefs, kelp beds, rocks and islets, creating the most thorough source of these typically shallow, inshore features. The depth surface and inshore features, available at the Alaska Fisheries Science Center (AFSC: http://www.afsc.noaa.gov), were mostly produced at a map scale of 1:20,000. |
Purpose: |
The purpose for creating this data set was to provide the best available bathymetry and inshore features of the central Gulf of Alaska for predictive, geospatial modeling of marine resources. |
Notes: |
Loaded by FGDC Metadata Uploader, batch 5224, 12-05-2014 10:42 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) |
Keywords
Theme Keywords
Thesaurus | Keyword |
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ISO 19115 Topic Category |
elevation
|
ISO 19115 Topic Category |
imageryBaseMapsEarthCover
|
ISO 19115 Topic Category |
oceans
|
UNCONTROLLED | |
None | Alaska |
None | bathymetry |
None | Gulf of Alaska |
None | North Pacific Ocean |
None | point |
Physical Location
Organization: | Alaska Fisheries Science Center |
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City: | Seattle |
State/Province: | WA |
Country: | USA |
Data Set Information
Data Set Scope Code: | Data Set |
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Maintenance Frequency: | None Planned |
Data Presentation Form: | digital point data |
Data Set Credit: | These features were digitized by Mark Zimmermann and Megan Prescott. Funding for much of the work was provided by NOAA's Essential Fish Habitat (EFH), Habitat and Ecological Processes Research (HEPR) through the Alaska NMFS Regional Office. B. McMahon, G. Nelson (retired) and especially C. Barry (Pacific Hydrographic Branch of the NOS) provided assistance with interpreting smooth sheets, bathymetric sounding files, and descriptive reports. D. Doyle and J. Benson provided valuable datum and GIS advice, respectively. D. Fischman, G. Glover, J.A. Bunn, J. Campagnoli, M. Frydrych, and M. Cole from the National Geophysical Data Center helped with accessing smooth sheets on the NGDC web site. |
Support Roles
Data Steward
Date Effective From: | 2015 |
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Date Effective To: | |
Contact (Person): | Zimmermann, Mark |
Email Address: | mark.zimmermann@noaa.gov |
Distributor
Date Effective From: | 2015 |
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Date Effective To: | |
Contact (Organization): | Alaska Fisheries Science Center (AFSC) |
Address: |
7600 Sand Point Way N.E., Building 4 Seattle, WA 98115 USA |
Email Address: | afsc.webmaster@noaa.gov |
Phone: | (206) 526-4000 |
Fax: | (206) 526-4004 |
URL: | https://www.fisheries.noaa.gov/about/alaska-fisheries-science-center |
Business Hours: | 0700-1700 Pacific Time |
Metadata Contact
Date Effective From: | 2014-12-05 |
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Date Effective To: | |
Contact (Person): | Zimmermann, Mark |
Email Address: | mark.zimmermann@noaa.gov |
Originator
Date Effective From: | 2014-12-05 |
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Date Effective To: | |
Contact (Person): | Zimmermann, Mark |
Email Address: | mark.zimmermann@noaa.gov |
Point of Contact
Date Effective From: | 2015 |
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Date Effective To: | |
Contact (Person): | Zimmermann, Mark |
Email Address: | mark.zimmermann@noaa.gov |
Extents
Currentness Reference: | observed |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -154.6 | |
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E° Bound: | -134.2 | |
N° Bound: | 60.7 | |
S° Bound: | 55.8 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Range |
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Start: | 1901 |
End: | 1999 |
Access Information
Security Class: | Unclassified |
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Data Access Procedure: |
unknown |
Data Access Constraints: |
These data are not to be used for navigation. |
Data Use Constraints: |
These data are not to be used for navigation. We consider this smooth sheet bathymetry and feature compilation a first draft. |
Metadata Use Constraints: |
These data are not to be used for navigation. |
Distribution Information
Distribution 1
Download URL: | http://www.afsc.noaa.gov/RACE/groundfish/bathymetry/CGOA_features.zip |
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Distributor: |
Distribution 2
Download URL: | https://www.ncei.noaa.gov |
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Distributor: |
URLs
URL 1
URL: | http://www.afsc.noaa.gov/RACE/groundfish/bathymetry/CGOA_features.zip |
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URL Type: |
Online Resource
|
File Resource Format: | ZIP |
Technical Environment
Description: |
Microsoft Windows 7 Version 6.1 (Build 7600) ; ESRI ArcGIS 10.0.5.4400 |
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Data Quality
Completeness Report: |
Our editing included deleting erroneous and superseded values, digitizing missing values, and properly aligning all data sets to a common, modern datum. |
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Conceptual Consistency: |
not applicable |
Quality Control Procedures Employed: |
Our editing included deleting erroneous and superseded values, digitizing missing values, and properly aligning all data sets to a common, modern datum. See also Abstract |
Data Management
Have Resources for Management of these Data Been Identified?: | No |
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Approximate Percentage of Budget for these Data Devoted to Data Management: | Unknown |
Do these Data Comply with the Data Access Directive?: | No |
Is Access to the Data Limited Based on an Approved Waiver?: | No |
If Distributor (Data Hosting Service) is Needed, Please Indicate: | Yes |
Approximate Delay Between Data Collection and Dissemination: | Unknown |
Actual or Planned Long-Term Data Archive Location: | NCEI-MD |
Approximate Delay Between Data Collection and Archiving: | unknown |
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?: |
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. |
Lineage
Lineage Statement: |
unknown |
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Catalog Details
Catalog Item ID: | 22903 |
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GUID: | gov.noaa.nmfs.inport:22903 |
Metadata Record Created By: | Nancy Roberson |
Metadata Record Created: | 2014-12-05 10:42+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2024-01-15 12:08+0000 |
Metadata Record Published: | 2016-05-18 |
Owner Org: | AFSC |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2016-05-18 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2017-05-18 |