Shoreline Data Rescue Project of New Chevak, Alaska, PH56B
Data Set (DS) | National Geodetic Survey (NGS)GUID: gov.noaa.nmfs.inport:61202 | Updated: October 17, 2023 | Published / External
Summary
Short Citation
National Geodetic Survey, 2024: Shoreline Data Rescue Project of New Chevak, Alaska, PH56B, https://www.fisheries.noaa.gov/inport/item/61202.
Full Citation Examples
These data were automated to provide an accurate high-resolution historical shoreline of New Chevak, Alaska suitable as a geographic information system (GIS) data layer. These data are derived from shoreline maps that were produced by the NOAA National Ocean Service including its predecessor agencies which were based on an office interpretation of imagery and/or field survey. The NGS attribution scheme 'Coastal Cartographic Object Attribute Source Table (C-COAST)' was developed to conform the attribution of various sources of shoreline data into one attribution catalog. C-COAST is not a recognized standard, but was influenced by the International Hydrographic Organization's S-57 Object-Attribute standard so the data would be more accurately translated into S-57. This resource is a member of https://www.fisheries.noaa.gov/inport/item/39808
Distribution Information
-
Viewer to download shoreline vector files
-
PDF - Adobe Portable Document Format
Project Completion Report
None
Data set is not for use in litigation. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, NOAA, cannot assume liability for any damages, or misrepresentations, caused by any inaccuracies in the data, or as a result of the data to be used on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. We do request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these data in a report, publication, or presentation.
Controlled Theme Keywords
National Geospatial Data Asset, NGDA, oceans, Water Oceans and Coasts Theme
Child Items
No Child Items for this record.
Contact Information
Point of Contact
NGS Communications and Outreach Branch
ngs.infocenter@noaa.gov
(301) 713-3242
Metadata Contact
NGS Communications and Outreach Branch
ngs.infocenter@noaa.gov
(301) 713-3242
Extents
-165.752088° W,
-165.55849° E,
61.6244223° N,
61.4992985° S
1951-06-01
Item Identification
Title: | Shoreline Data Rescue Project of New Chevak, Alaska, PH56B |
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Status: | Completed |
Creation Date: | 2020 |
Abstract: |
These data were automated to provide an accurate high-resolution historical shoreline of New Chevak, Alaska suitable as a geographic information system (GIS) data layer. These data are derived from shoreline maps that were produced by the NOAA National Ocean Service including its predecessor agencies which were based on an office interpretation of imagery and/or field survey. The NGS attribution scheme 'Coastal Cartographic Object Attribute Source Table (C-COAST)' was developed to conform the attribution of various sources of shoreline data into one attribution catalog. C-COAST is not a recognized standard, but was influenced by the International Hydrographic Organization's S-57 Object-Attribute standard so the data would be more accurately translated into S-57. This resource is a member of https://www.fisheries.noaa.gov/inport/item/39808 |
Purpose: |
The shoreline and associated data layers were originally intended to support NOAA Nautical Chart production. These datasets have been cleaned and reformatted to support the efforts of supplying accurate shoreline data layers for a coastal GIS database. These datasets may be beneficial for performing change analysis for erosion and accretion studies, land use planning, determination of boundary extent, and other types of decision making. |
Supplemental Information: |
These shoreline data represent a vector conversion of a set of NOS raster shoreline manuscript identified by t-sheet or tp-sheet numbers. These vector data were created by contractors for NOS who vectorized georeferenced raster shoreline manuscripts using Environmental Systems Research Institute, Inc. (ESRI)(r), ArcInfo's(r) ArcScan(r) software to create individual ArcInfo coverages. The individual coverages were ultimately edgematched within a surveyed project area and appended together. The NOAA NESDIS Environmental Data Rescue Program (EDRP) funded this project. The NOAA National Ocean Service, Office for Coastal Management, developed the procedures used in this project and was responsible for project oversight. The project intent was to rescue valuable historical data and make it accessible and useful to the coastal mapping community. This process involved the conversion of original analog products to digital mapping products. This file is a further conversion of that product from a raster to a vector product that may be useful for Electronic Charting and Display Information Systems (ECDIS) and geographic information systems (GIS). Information on shapefile attributes can be found at https://www.fisheries.noaa.gov/inport/item/60809 |
Keywords
Theme Keywords
Thesaurus | Keyword |
---|---|
ISO 19115 Topic Category |
oceans
|
NGDA Portfolio Themes |
National Geospatial Data Asset
|
NGDA Portfolio Themes |
NGDA
|
NGDA Portfolio Themes |
Water Oceans and Coasts Theme
|
UNCONTROLLED | |
None | Coast and Geodetic Survey |
None | Coastal Base Map |
None | coastal maps |
None | coastal survey |
None | Coastal Zone Map |
None | NOAA Shoreline |
None | T-sheet |
None | Tp-sheet |
Spatial Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA
|
UNCONTROLLED | |
None | New Chevak |
Physical Location
Organization: | National Geodetic Survey |
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City: | Silver Spring |
State/Province: | MD |
Data Set Information
Data Set Scope Code: | Data Set |
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Data Set Type: | GIS Files |
Maintenance Frequency: | None Planned |
Data Presentation Form: | Vector |
Distribution Liability: |
These data were generated for use by NGS during the course of its development of potential final products to fulfill its statutory mission. Although NGS is making these data available to others who may find the data of value, NGS does not warrant, endorse, or recommend the use of these data for any given purpose. The user assumes the entire risk related to the use of these data. These data are not for navigational purposes. NGS is providing these data "as is," and NGS disclaims any and all warranties, whether expressed or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will NGS be liable to you or to any third party for any direct, indirect, incidental, consequential, special, or exemplary damages or lost profits resulting from any use or misuse of these data. |
Data Set Credit: | NOAA |
Support Roles
Data Steward
Date Effective From: | 2020 |
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Date Effective To: | |
Contact (Organization): | NGS Communications and Outreach Branch |
Email Address: | ngs.infocenter@noaa.gov |
Phone: | (301) 713-3242 |
Fax: | (301) 713-4172 |
Distributor
Date Effective From: | 2020 |
---|---|
Date Effective To: | |
Contact (Organization): | NGS Communications and Outreach Branch |
Email Address: | ngs.infocenter@noaa.gov |
Phone: | (301) 713-3242 |
Fax: | (301) 713-4172 |
Metadata Contact
Date Effective From: | 2020 |
---|---|
Date Effective To: | |
Contact (Organization): | NGS Communications and Outreach Branch |
Email Address: | ngs.infocenter@noaa.gov |
Phone: | (301) 713-3242 |
Fax: | (301) 713-4172 |
Point of Contact
Date Effective From: | 2020 |
---|---|
Date Effective To: | |
Contact (Organization): | NGS Communications and Outreach Branch |
Email Address: | ngs.infocenter@noaa.gov |
Phone: | (301) 713-3242 |
Fax: | (301) 713-4172 |
Extents
Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -165.752088 | |
---|---|---|
E° Bound: | -165.55849 | |
N° Bound: | 61.6244223 | |
S° Bound: | 61.4992985 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Discrete |
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Start: | 1951-06-01 |
Spatial Information
Reference Systems
Reference System 1
Coordinate Reference System |
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Access Information
Security Class: | Unclassified |
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Data Access Constraints: |
None |
Data Use Constraints: |
Data set is not for use in litigation. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, NOAA, cannot assume liability for any damages, or misrepresentations, caused by any inaccuracies in the data, or as a result of the data to be used on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. We do request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these data in a report, publication, or presentation. |
Distribution Information
Distribution 1
Start Date: | 2020 |
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End Date: | Present |
Download URL: | https://www.ngs.noaa.gov/NSDE/ |
Distributor: | NGS Communications and Outreach Branch (2020 - Present) |
Description: |
Viewer to download shoreline vector files |
File Type (Deprecated): | Zip |
Compression: | Zip |
Distribution 2
Start Date: | 2020 |
---|---|
End Date: | Present |
Download URL: | https://www.ngs.noaa.gov/desc_reports/T09685.pdf |
Distributor: | NGS Communications and Outreach Branch (2020 - Present) |
File Name: | NOAA COASTAL MAPPING PROGRAM PROJECT COMPLETION REPORT |
Description: |
Project Completion Report |
File Type (Deprecated): | |
Distribution Format: | PDF - Adobe Portable Document Format |
URLs
URL 1
URL: | https://shoreline.noaa.gov/ |
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Name: | NOAA Shoreline Website |
URL Type: |
Online Resource
|
File Resource Format: | HTML |
Description: |
Web page that provides information about and access to shoreline. |
URL 2
URL: | https://www.ngs.noaa.gov/ |
---|---|
Name: | National Geodetic Survey |
URL Type: |
Online Resource
|
File Resource Format: | HTML |
Description: |
Web page for NOAA's National Geodetic Survey |
URL 3
URL: | https://www.ngs.noaa.gov/INFO/remote-sensing.shtml |
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Name: | National Geodetic Survey Remote Sensing Division |
URL Type: |
Online Resource
|
File Resource Format: | HTML |
Description: |
Web page for NOAA's National Geodetic Survey remote sensing data and imagery. |
Data Quality
Horizontal Positional Accuracy: |
Vector data was derived from rectified raster images of NOS coastal survey maps using ArcInfo processing software. These vector shoreline data are referenced to the North American Datum of 1983. Vector shoreline extracted from map images adequately represents the shoreline shown on original NOS source surveys. The absolute value of the overall predicted horizontal accuracy has not been determined. However, the reports associated with the project maps describe the process of producing the map source and includes the horizontal control layout and if aerotriangulated, the fit to control statistics. One may refer to the 6 March 1991 edition of 'Journal of Coastal Research' entitled 'Historical Shoreline Change: Error Analysis and Mapping Accuracy' for an independent accuracy assessment of vectorized NOS digital shoreline conducted by the Federal Emergency Management Agency and the University of Maryland. |
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Completeness Measure: |
All data are clipped to the neatline representing a surveyed project boundary. Line segments which did not close were snapped by the nodes to create consistently tied strings without node dangles. |
Completeness Report: |
The shoreline and associated data are a representation based on an office interpretation of imagery at the time of photographs taken 1951-06-01. To maintain shoreline continuity, a line with 'Shoreline/Alongshore Feature Boundary' attribution was added to the 'Shoreline' class. This feature is an artificial line that separates double-lined alongshore features from the shoreline. The 'Shoreline/Alongshore Feature Boundary' indicates to the user that a man-made alongshore feature is coincident to the shoreline in the data file. The rectangular geographic boundary limits is for data management purposes and does not infer complete surveyed coverage. |
Conceptual Consistency: |
The shoreline and associated data are a representation based on an office interpretation of imagery and/or fieldwork at the time of survey. The attribute accuracy was tested by creating checkplots of the coded linework. The codes depict shoreline and several alongshore features. A light table review of the checkplots revealed any inaccurate coding. Mistakes were identified and corrected. These attributes were translated into NGS's Coastal Cartographic Object Attribute Source Table (C-COAST) for data consistency. The C-COAST attributes were given symbology and visually inspected to verify attribute accuracy. |
Lineage
Sources
Shoreline Delineation
Contact Role Type: | Originator |
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Contact Type: | Organization |
Contact Name: | National Geodetic Survey |
Process Steps
Process Step 1
Description: |
During the vectorization process, all adjoining shoreline maps in the project are displayed on a computer screen and the shoreline is traced and coded appropriately. Maps within a project generally adjoin and, therefore, there is significant agreement of linework across the borders of the shoreline maps. This results in fewer errors related to the edge-matching process. Polygon labels and attributes are assigned to features containing area so that users may shade the data to determine land, water, or man-made features. All lines were attributed with feature code values which were translated to conform with NGS's Coastal Cartographic Object Attribute Source Table attribution scheme. |
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Process Date/Time: | 2005-09-02 00:00:00 |
Process Contact: | National Geodetic Survey (NGS) |
Catalog Details
Catalog Item ID: | 61202 |
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GUID: | gov.noaa.nmfs.inport:61202 |
Metadata Record Created By: | Maryellen Sault |
Metadata Record Created: | 2020-07-24 09:39+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2023-10-17 16:12+0000 |
Metadata Record Published: | 2021-01-25 |
Owner Org: | NGS |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2021-01-25 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2022-01-25 |