Search Help Show/Hide Menu
Summary
Item Identification
Keywords
Physical Location
Data Set Info
Support Roles
Extents
Access Info
Distribution Info
URLs
Tech Environment
Data Quality
Data Management
Lineage
Catalog Details

Summary

Short Citation
Alaska Fisheries Science Center, 2024: AFSC/RACE/GAP/Prescott: Central Gulf of Alaska Multibeam Survey H11354, https://www.fisheries.noaa.gov/inport/item/22953.
Full Citation Examples

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. There were several areas where these older surveys were superseded by more recent, higher quality multibeam surveys, mostly from the NOS (n=106).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.

Survey H11354 was missing in the entrance to Sitka Sound. Processing and adding its bathymetric data to our compilation filled in a substantial gap in Sitka area.

Distribution Information

Access Constraints:

These data are not to be used for navigation.

Use Constraints:

These data are not to be used for navigation. We consider this bathymetry compilation a fairly complete first draft and sufficient in quality for addition to the central Gulf of Alaska bathymetry compilation.

Controlled Theme Keywords

elevation, imageryBaseMapsEarthCover, oceans

Child Items

No Child Items for this record.

Contact Information

Point of Contact
Megan Prescott
megan.prescott@noaa.gov

Metadata Contact
Megan Prescott
megan.prescott@noaa.gov

Extents

Geographic Area 1

-135.47° W, -135.35° E, 57.03° N, 56.94° S

A 97.73 km2 region in the entrance to Sitka Sound, Eastern Channel.

Time Frame 1
2004 - 2004

Item Identification

Title: AFSC/RACE/GAP/Prescott: Central Gulf of Alaska Multibeam Survey H11354
Short Name: AFSC/RACE/GAP/Prescott: Central Gulf of Alaska Multibeam Survey H11354
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. 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.

Survey H11354 was missing in the entrance to Sitka Sound. Processing and adding its bathymetric data to our compilation filled in a substantial gap in Sitka area.

Purpose:

The purpose for creating this coverage was to fill in gaps with previously unprocessed multibeam data set, that were missing in the central Gulf of Alaska data set. Combined with other bathymetric data in the region this work is useful for predictive, geospatial modeling of marine resources.

Notes:

Loaded by FGDC Metadata Uploader, batch 5281, 01-06-2015 13:56

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
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
City: Seattle
State/Province: WA
Country: USA

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Data Presentation Form: digital point data
Data Set Credit: This multibeam bathymetry was processed by 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

CC ID: 247926
Date Effective From: 2015
Date Effective To:
Contact (Person): Prescott, Megan
Email Address: megan.prescott@noaa.gov

Distributor

CC ID: 247925
Date Effective From: 2015
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

CC ID: 183044
Date Effective From: 2015-01-06
Date Effective To:
Contact (Person): Prescott, Megan
Email Address: megan.prescott@noaa.gov

Originator

CC ID: 183045
Date Effective From: 2015-01-06
Date Effective To:
Contact (Person): Prescott, Megan
Email Address: megan.prescott@noaa.gov

Point of Contact

CC ID: 247924
Date Effective From: 2015
Date Effective To:
Contact (Person): Prescott, Megan
Email Address: megan.prescott@noaa.gov

Extents

Currentness Reference: observed

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 183043
W° Bound: -135.47
E° Bound: -135.35
N° Bound: 57.03
S° Bound: 56.94
Description

A 97.73 km2 region in the entrance to Sitka Sound, Eastern Channel.

Extent Group 1 / Time Frame 1

CC ID: 183042
Time Frame Type: Range
Start: 2004
End: 2004

Access Information

Security Class: Unclassified
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 bathymetry compilation a fairly complete first draft and sufficient in quality for addition to the central Gulf of Alaska bathymetry compilation.

Metadata Use Constraints:

These data are not to be used for navigation.

Distribution Information

Distribution 1

CC ID: 247928
Download URL: http://www.afsc.noaa.gov/RACE/groundfish/bathymetry/CGOA_H11354.zip
Distributor:

Distribution 2

CC ID: 247927
Download URL: https://www.ncei.noaa.gov
Distributor:

URLs

URL 1

CC ID: 183047
URL: http://www.afsc.noaa.gov/RACE/groundfish/bathymetry/CGOA_H11354.zip
URL Type:
Online Resource
File Resource Format: ZIP

Technical Environment

Description:

Microsoft Windows 7 Version 6.1 (Build 7600) ; ESRI ArcGIS 10.0.0 ; CARIS HIPS and SIPS 7.1

Data Quality

Completeness Report:

Processing followed guidelines laid out by NGDC in the Data Aquisition and Processing Report (http://surveys.ngdc.noaa.gov/mgg/NOS/DAPRs/OPR-O112-RA-04_DAPR.pdf), in order to provide comparable work. It was carried out in Caris Hips and Sips 7.1 then exported into ArcGIS 10.0.0, to be added to our additional smooth sheet and multibeam data.

Conceptual Consistency:

not applicable

Quality Control Procedures Employed:

unknown

Data Management

Have Resources for Management of these Data Been Identified?: No
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

Catalog Details

Catalog Item ID: 22953
GUID: gov.noaa.nmfs.inport:22953
Metadata Record Created By: Nancy Roberson
Metadata Record Created: 2014-12-23 11:33+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