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Summary
Item Identification
Keywords
Physical Location
Data Set Info
Support Roles
Extents
Access Info
Distribution Info
Data Quality
Data Management
Lineage
Catalog Details

Summary

Short Citation
Alaska Fisheries Science Center, 2024: AFSC/RACE/GAP/McConnaughey: Bristol Bay Reconnaissance Study-2002-Side scan sonar, https://www.fisheries.noaa.gov/inport/item/32383.
Full Citation Examples

Abstract

Environmental variables that are ecologically relevant and easily measured over large areas are useful for modelling species distributions and habitats. Continuous acoustic, sonar-backscatter data convey information about physical properties of the seabed, and hence could be a valuable addition to that suite of variables. The potential utility of acoustic backscatter was tested for improving habitat models of marine species using data from a pilot sidescan-sonar survey conducted from 28 June to 3 July 2002 in the Bristol Bay region of the eastern Bering Sea (EBS). Raw digital backscatter data were processed with QTC SIDEVIEW and CLAMS software to objectively segment bedform based on statistical analysis of the echograms. Resultant acoustic variables - Q-values (Q1, Q2, and Q3)-, representing the first three principal components of the data derived from image analysis of backscatter echoes, and a complexity metric (compx) measuring the variance of Q-values in a geographic area - were used in multiple linear regression to model individual species abundance from bottom-trawl survey data.

Distribution Information

Access Constraints:

There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed.

Use Constraints:

The United States Government shall not be held liable for improper or incorrect use of data described and/or contained herein. These data and related graphics are not legal documents and are not intended to be used as such. The Alaska Fisheries Science Center gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. Spatial information may not meet National Map Accuracy Standards. The information contained in these data is dynamic and may change over time. Original data were compiled from various sources. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. It is strongly recommended that these data are directly acquired from an Alaska Fisheries Science Center server and not indirectly through other sources which may have changed the data in some way. Although these data have been used (processed) successfully on a computer system at the Alaska Fisheries Science Center, no warranty expressed or implied is made regarding the utility of the data on another 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.

Controlled Theme Keywords

geoscientificInformation

Child Items

No Child Items for this record.

Contact Information

Point of Contact
Bob McConnaughey
bob.mcconnaughey@noaa.gov

Metadata Contact
Metadata Coordinators MC
AFSC.metadata@noaa.gov

Extents

Geographic Area 1

-162.242882° W, -159.018071° E, 58.32594° N, 55.830994° S

More elaborate than a keyword.

Time Frame 1
2002-06 - 2002-07

Item Identification

Title: AFSC/RACE/GAP/McConnaughey: Bristol Bay Reconnaissance Study-2002-Side scan sonar
Status: Completed
Abstract:

Environmental variables that are ecologically relevant and easily measured over large areas are useful for modelling species distributions and habitats. Continuous acoustic, sonar-backscatter data convey information about physical properties of the seabed, and hence could be a valuable addition to that suite of variables. The potential utility of acoustic backscatter was tested for improving habitat models of marine species using data from a pilot sidescan-sonar survey conducted from 28 June to 3 July 2002 in the Bristol Bay region of the eastern Bering Sea (EBS). Raw digital backscatter data were processed with QTC SIDEVIEW and CLAMS software to objectively segment bedform based on statistical analysis of the echograms. Resultant acoustic variables - Q-values (Q1, Q2, and Q3)-, representing the first three principal components of the data derived from image analysis of backscatter echoes, and a complexity metric (compx) measuring the variance of Q-values in a geographic area - were used in multiple linear regression to model individual species abundance from bottom-trawl survey data.

Purpose:

In addition to examining the utility of acoustic backscatter for modelling various biotic distributions, the data also provided a geological seabed reconnaissance across a relatively large, and previously unsurveyed, area of the EBS. QTC classification results were additionally compared with expert interpretations by a marine geologist familiar with the Bristol Bay region, and groundtruth data were summarized.

Notes:

Loaded by batch 3781, 12-05-2012 13:47

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
geoscientificInformation
UNCONTROLLED
None acoustic sediment classification
None grain size analysis

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
None Bering Sea

Physical Location

Organization: Alaska Fisheries Science Center
City: Seattle
State/Province: WA
Country: USA

Data Set Information

Data Set Scope Code: Data Set
Data Presentation Form: Map (digital)

Support Roles

Data Steward

CC ID: 318738
Date Effective From: 2015
Date Effective To:
Contact (Person): McConnaughey, Bob
Email Address: bob.mcconnaughey@noaa.gov
Contact Instructions:

email

Distributor

CC ID: 318739
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: 318737
Date Effective From: 2015
Date Effective To:
Contact (Person): MC, Metadata Coordinators
Email Address: AFSC.metadata@noaa.gov

Point of Contact

CC ID: 318736
Date Effective From: 2012-12-05
Date Effective To:
Contact (Person): McConnaughey, Bob
Email Address: bob.mcconnaughey@noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 318742
W° Bound: -162.242882
E° Bound: -159.018071
N° Bound: 58.32594
S° Bound: 55.830994
Description

More elaborate than a keyword.

Extent Group 1 / Time Frame 1

CC ID: 318741
Time Frame Type: Range
Start: 2002-06
End: 2002-07

Access Information

Security Class: Unclassified
Data Access Procedure:

unknown

Data Access Constraints:

There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed.

Data Use Constraints:

The United States Government shall not be held liable for improper or incorrect use of data described and/or contained herein. These data and related graphics are not legal documents and are not intended to be used as such. The Alaska Fisheries Science Center gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. Spatial information may not meet National Map Accuracy Standards. The information contained in these data is dynamic and may change over time. Original data were compiled from various sources. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. It is strongly recommended that these data are directly acquired from an Alaska Fisheries Science Center server and not indirectly through other sources which may have changed the data in some way. Although these data have been used (processed) successfully on a computer system at the Alaska Fisheries Science Center, no warranty expressed or implied is made regarding the utility of the data on another 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.

Distribution Information

Distribution 1

CC ID: 318746
Download URL: https://www.ncei.noaa.gov
Distributor:

Data Quality

Completeness Report:

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?: Yes
If Distributor (Data Hosting Service) is Needed, Please Indicate: Yes
Approximate Delay Between Data Collection and Dissemination: Unknown
If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed:

No delay

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: 32383
GUID: gov.noaa.nmfs.inport:32383
Metadata Record Created By: Theresa A Smith
Metadata Record Created: 2016-04-19 12:42+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2024-01-15 12:08+0000
Metadata Record Published: 2019-05-31
Owner Org: AFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2019-05-31
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2020-05-31