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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/Zimmermann: Cook Inlet Sediments, https://www.fisheries.noaa.gov/inport/item/22168.
Full Citation Examples

Abstract

We assembled 1.4 million National Ocean Service (NOS) bathymetric soundings from 98 lead-line and single-beam echosounder hydrographic surveys conducted from 1910 to 1999 in Cook Inlet, 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 Our editing included deleting erroneous and superseded values, digitizing missing values, and properly aligning all data sets to a common, modern datum. There were six areas where these older surveys were superseded by compilations of reduced-resolution multibeam surveys. We digitized 12,000 features, such as rocky reefs, kelp beds, rocks and islets, adding them to what was originally available, and creating the most thorough source (n = 18,000) of these typically shallow, inshore features. We also digitized 2,418 km of the mainland and 529 km of island shoreline, generally at a resolution of 1:20,000, and digitized 9,271 verbal surficial sediment descriptions from the smooth sheets. The depth surface, shoreline, inshore features, and sediment data sets are mostly produced at a scale of 1:20,000.

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 smooth sheet bathymetry, feature, shoreline and sediment compilation a fairly complete first draft. Sediment samples were taken with grabs from most of these surveys because the surveys were conducted with single-beam echosounders rather than lead lines. The older surveys (1910-14) relied on lead-line sediment observations. Verbal sediment descriptions were also digitized from the smooth sheets. Short abbreviations such as "S" and "M" were translated into their full names of "Sand" and "Mud". Position of the sediment points were centered on the written description. Some sediment descriptions were also available within the Descriptive Reports and since these sometimes varied from what was written on the smooth sheets, these were entered into a separate column.

Controlled Theme Keywords

elevation, imageryBaseMapsEarthCover, oceans

Child Items

No Child Items for this record.

Contact Information

Point of Contact
Mark Zimmermann
mark.zimmermann@noaa.gov

Metadata Contact
Mark Zimmermann
mark.zimmermann@noaa.gov

Extents

Geographic Area 1

-154.3° W, -148.9° E, 61.6° N, 58.8° S

The 20,540 km2 of Cook Inlet, including Kamishak Bay, Kachemak Bay, Knik Arm and Turnagain Arm.

Time Frame 1
1910 - 1999

Item Identification

Title: AFSC/RACE/GAP/Zimmermann: Cook Inlet Sediments
Short Name: AFSC/RACE/GAP/Zimmermann: Cook Inlet Sediments
Status: Completed
Publication Date: 2014-04
Abstract:

We assembled 1.4 million National Ocean Service (NOS) bathymetric soundings from 98 lead-line and single-beam echosounder hydrographic surveys conducted from 1910 to 1999 in Cook Inlet, 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 six areas where these older surveys were superseded by compilations of reduced-resolution multibeam surveys. We digitized 12,000 features, such as rocky reefs, kelp beds, rocks and islets, adding them to what was originally available, and creating the most thorough source (n = 18,000) of these typically shallow, inshore features. We also digitized 2,418 km of the mainland and 529 km of island shoreline, generally at a resolution of 1:20,000, and digitized 9,271 verbal surficial sediment descriptions from the smooth sheets. The depth surface, shoreline, inshore features, and sediment data sets are mostly produced at a scale of 1:20,000.

Purpose:

The purpose for creating this data set was to provide the best available sediment information of Cook Inlet for predictive, geospatial modeling of marine resources.

Notes:

Loaded by FGDC Metadata Uploader, batch 5105, 09-10-2014 12:57

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 Cook Inlet
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: These sediment data 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

CC ID: 248034
Date Effective From: 2015
Date Effective To:
Contact (Person): Zimmermann, Mark
Email Address: mark.zimmermann@noaa.gov

Distributor

CC ID: 248035
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: 175099
Date Effective From: 2014-09-10
Date Effective To:
Contact (Person): Zimmermann, Mark
Email Address: mark.zimmermann@noaa.gov

Originator

CC ID: 175100
Date Effective From: 2014-09-10
Date Effective To:
Contact (Person): Zimmermann, Mark
Email Address: mark.zimmermann@noaa.gov

Point of Contact

CC ID: 248033
Date Effective From: 2015
Date Effective To:
Contact (Person): Zimmermann, Mark
Email Address: mark.zimmermann@noaa.gov

Extents

Currentness Reference: observed

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 175098
W° Bound: -154.3
E° Bound: -148.9
N° Bound: 61.6
S° Bound: 58.8
Description

The 20,540 km2 of Cook Inlet, including Kamishak Bay, Kachemak Bay, Knik Arm and Turnagain Arm.

Extent Group 1 / Time Frame 1

CC ID: 175097
Time Frame Type: Range
Start: 1910
End: 1999

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 smooth sheet bathymetry, feature, shoreline and sediment compilation a fairly complete first draft. Sediment samples were taken with grabs from most of these surveys because the surveys were conducted with single-beam echosounders rather than lead lines. The older surveys (1910-14) relied on lead-line sediment observations. Verbal sediment descriptions were also digitized from the smooth sheets. Short abbreviations such as "S" and "M" were translated into their full names of "Sand" and "Mud". Position of the sediment points were centered on the written description. Some sediment descriptions were also available within the Descriptive Reports and since these sometimes varied from what was written on the smooth sheets, these were entered into a separate column.

Metadata Use Constraints:

These data are not to be used for navigation.

Distribution Information

Distribution 1

CC ID: 248018
Download URL: http://www.afsc.noaa.gov/RACE/groundfish/bathymetry/Cook_Inlet_sediments.zip
Distributor:

Distribution 2

CC ID: 248017
Download URL: https://www.ncei.noaa.gov
Distributor:

URLs

URL 1

CC ID: 175102
URL: http://www.afsc.noaa.gov/RACE/groundfish/bathymetry/Cook_Inlet_sediments.zip
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

Data Quality

Completeness Report:

We digitized this data set from smooth sheets aligned to a common, modern datum (NAD 1983 HARN).

Conceptual Consistency:

not applicable

Quality Control Procedures Employed:

See Data Use Constraints

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: 22168
GUID: gov.noaa.nmfs.inport:22168
Metadata Record Created By: Nancy Roberson
Metadata Record Created: 2014-09-10 12:57+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