Polygon shapefiles attributed with morphometric information for barrier islands and spits located along the north coast of Alaska between Cape Beaufort and the U.S.-Canadian border, 1947 to 2019

Metadata also available as - [Questions & Answers] - [Parseable text] - [XML]

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Anna I. Hamilton
Originator: Ann E. Gibbs
Originator: Li H. Erikson
Originator: Anita C. Engelstad
Publication_Date: 20210812
Title:

Polygon shapefiles attributed with morphometric information for barrier islands and spits located along the north coast of Alaska between Cape Beaufort and the U.S.-Canadian border, 1947 to 2019

Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polygon)
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P90EQ1H7

Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Online_Linkage:

https://www.sciencebase.gov/catalog/item/5f8f1b8582ce06b040efc901

Online_Linkage: https://doi.org/10.5066/P90EQ1H7
Larger_Work_Citation:

Citation_Information:

Originator: Anna I. Hamilton
Originator: Ann E. Gibbs
Originator: Li H. Erikson
Originator: Anita C. Engelstad
Publication_Date: 20201231
Title:

Historical shorelines and morphological metrics for barrier islands and spits along the north coast of Alaska between Cape Beaufort and the U.S.-Canadian border, 1947 to 2019

Geospatial_Data_Presentation_Form: Publication (Other)
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P90EQ1H7

Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P90EQ1H7

Description:

Abstract:

A suite of morphological metrics were derived from existing shoreline and elevation datasets for barrier islands and spits located along the north-slope coast of Alaska between Cape Beaufort and the U.S.-Canadian border. This dataset includes barrier polygons attributed with morphological metrics from five time periods: 1950s, 1980s, 2000s, 2010s, and 2020s.

Purpose:

These data accompany Hamilton and others (2021), a U.S. Geological Survey Open-File Report summarizing historical morphological change to barrier islands and spits located along the north-slope coast of Alaska between Cape Beaufort and the U.S.-Canadian border. The purpose of the study is to improve upon the understanding of barrier formation, evolution, and stability in a permafrost setting. The results can be used to advance an understanding of barrier island dynamics and better predict future barrier evolution and prevalence along Alaska’s coast.

Supplemental_Information:

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19470701
Ending_Date: 20190620

Currentness_Reference: dates of source data used

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -164.08213763
East_Bounding_Coordinate: -140.489705466
North_Bounding_Coordinate: 71.377552267
South_Bounding_Coordinate: 69.080580846

Keywords:

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Physical habitats and geomorphology

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: barrier island migration
Theme_Keyword: barrier island
Theme_Keyword: permafrost

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: coastal processes

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC
Theme_Keyword: barrier spit
Theme_Keyword: shoreline change

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5f8f1b8582ce06b040efc901

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: State of Alaska
Place_Keyword: North Slope Place_Keyword: Chukchi Sea

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Arctic
Place_Keyword: Beaufort Sea
Place_Keyword: North Slope coast

Access_Constraints: None
Use_Constraints:

USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Person: PCMSC Science Data Coordinator

Contact_Address:

Address_Type: Mailing and Physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: USA

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Native_Data_Set_Environment:

Environment as of Metadata Creation: Microsoft [Unknown] Version 6.2 (Build 9200); Esri ArcGIS 10.7.1 (Build 11595) Service Pack N/A (Build N/A)

Cross_Reference:

Citation_Information:

Originator: Ann E. Gibbs
Originator: Bruce M. Richmond
Publication_Date: 2015
Title:

National assessment of shoreline change--Historical shoreline change along the north coast of Alaska, U.S.-Canadian border to Icy Cape

Other_Citation_Details:

Gibbs, A.E., and Richmond, B.M., 2015, National assessment of shoreline change--Historical shoreline change along the north coast of Alaska, U.S.-Canadian border to Icy Cape: U.S. Geological Survey Open-File Report 2015-1048, 96 p.

Online_Linkage: https://doi.org/10.3133/ofr20151048

Cross_Reference:

Citation_Information:

Originator: Ann E. Gibbs
Originator: Bruce M. Richmond
Publication_Date: 2017
Title:

National assessment of shoreline change--Summary statistics for updated vector shorelines and associated shoreline change data for the north coast of Alaska, U.S.-Canadian border to Icy Cape

Other_Citation_Details:

Gibbs, A.E., and Richmond, B.M., 2017, National assessment of shoreline change--Summary statistics for updated vector shorelines and associated shoreline change data for the north coast of Alaska, U.S.-Canadian border to Icy Cape: U.S. Geological Survey Open-File Report 2017--1107, 21 p.

Online_Linkage: https://doi.org/10.3133/ofr20171107

Cross_Reference:

Citation_Information:

Originator: Emily A. Himmelstoss
Originator: Rachel E. Henderson
Originator: Meridith G. Kratzmann
Originator: Amy S. Farris
Publication_Date: 2018
Title: Digital Shoreline Analysis System (DSAS) version 5.0 user guide
Other_Citation_Details:

Himmelstoss, E.A., Henderson, R.E., Kratzmann, M.G., and Farris, A.S., 2018, Digital Shoreline Analysis System (DSAS) version 5.0 user guide: U.S. Geological Survey Open-File Report 2018–1179, 110 p.

Online_Linkage: https://doi.org/10.3133/ofr20181179

Cross_Reference:

Citation_Information:

Originator: Ann E. Gibbs
Originator: Alexander G. Snyder
Originator: Bruce M. Richmond
Publication_Date: 2019
Title:

National assessment of shoreline change--Historical shoreline change along the north coast of Alaska, Icy Cape to Cape Prince of Wales

Other_Citation_Details:

Gibbs, A.E., Snyder, A.G., and Richmond, B.M., 2019, National assessment of shoreline change--Historical shoreline change along the north coast of Alaska, Icy Cape to Cape Prince of Wales: U.S. Geological Survey Open-File Report 2019-1146, 52 p.

Online_Linkage: https://doi.org/10.3133/ofr20191146

Cross_Reference:

Citation_Information:

Originator: Anna I. Hamilton
Originator: Ann E. Gibbs
Originator: Li H. Erikson
Originator: Anita C. Engelstad
Publication_Date: 2021
Title:

Assessment of barrier island morphological change in northern Alaska

Other_Citation_Details:

Hamilton, A.I., Gibbs, A.E., Erikson, L.H., and Engelstad, A.C., 2021, Assessment of barrier island morphological change in northern Alaska: U.S. Geological Survey Open-File Report 2021-1074

Online_Linkage: https://doi.org/10.3133/ofr2021-1074

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The attributes in this dataset record positional and measurement uncertainties calculated during the process of extracting morphological metrics from the data as described in the process steps.

Logical_Consistency_Report:

Adjacent polygons do not overlap across time periods. Polygons were quality checked for accuracy.

Completeness_Report:

This file is complete and contains all polygons used to calculate morphological metrics along sections of the specified Alaska coastal region where shoreline position data were available. These data adequately represented the shoreline position at the time of the survey. Remaining gaps in these data are a consequence of nonexisting data or existing data that did not meet quality assurance standards.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. The horizontal accuracy of shorelines compiled from 1947 to 2019 data varies with respect to the data source from which the shorelines were digitized and the time period. Please visit the 'Estimation of Shoreline Position Uncertainty' section in Gibbs and Richmond (2015), Gibbs and Richmond (2017) and Gibbs and others (2019) for a complete explanation of the measurement uncertainties associated with these shorelines.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

A formal accuracy assessment of the vertical positional information in the data set has either not been conducted or is not applicable.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Anna I. Hamilton
Originator: Ann E. Gibbs
Originator: Li H. Erikson
Originator: Anita C. Engelstad
Publication_Date: 2021
Title:

Historical shoreline vectors for barrier islands and spits along the north coast of Alaska between Cape Beaufort and the U.S.-Canadian border, 1947 to 2019

Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polyline)
Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P90EQ1H7

Type_of_Source_Media: Digital and/or Hardcopy Resources
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19470701
Ending_Date: 20190620

Source_Currentness_Reference: dates of source data used

Source_Citation_Abbreviation: Hamilton and others (2021)
Source_Contribution:

Source information used in support of the development of the data set.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Ann E. Gibbs
Originator: Karin A. Ohman
Originator: Ryan Coppersmith
Originator: Bruce M. Richmond
Publication_Date: 20170918
Title:

A GIS compilation of updated vector shorelines and associated shoreline change data for the north coast of Alaska, U.S. Canadian Border to Icy Cape

Geospatial_Data_Presentation_Form: Vector Digital Data Set
Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/F72Z13N1

Type_of_Source_Media: Digital and/or Hardcopy Resources
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19470701
Ending_Date: 20120813

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: Gibbs and others (2017)
Source_Contribution:

Source information used in support of the development of the data set.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Alexander G. Snyder
Originator: Ann E. Gibbs
Publication_Date: 20191227
Title:

National Assessment of Shoreline Change: A GIS compilation of vector shorelines and associated shoreline change data for the north coast of Alaska, Icy Cape to Cape Prince of Wales

Geospatial_Data_Presentation_Form: Vector Digital Data Set
Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P9H1S1PV

Type_of_Source_Media: Digital and/or Hardcopy Resources
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19480701
Ending_Date: 20160903

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: Snyder and Gibbs, 2019
Source_Contribution:

Source information used in support of the development of the data set.

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 2015
Title: 2009 USGS Lidar: North Slope, Alaska
Geospatial_Data_Presentation_Form: LAS point cloud
Publication_Information:

Publication_Place: online
Publisher: NOAA Digital Coast

Online_Linkage: https://coast.noaa.gov/digitalcoast/data/

Type_of_Source_Media: Digital Resources
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20090905
Ending_Date: 20160903

Source_Currentness_Reference: ground condition at time data were collected

Source_Citation_Abbreviation: 2010s barrier elevation dataset
Source_Contribution: Data were used as the source of barrier elevation.

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Fish and Wildlife Service
Originator: Arctic Landscape Conservation Cooperative
Originator:

University of Alaska, Fairbanks Alaska Satellite Facility and the Geographic Information Network of Alaska

Publication_Date: 2012
Title:

Orthorectified 1:64,000-scale color-infrared Alaska High-Altitude Aerial Photography

Geospatial_Data_Presentation_Form: Raster Digital Dataset
Publication_Information:

Publication_Place: Unpublished data
Publisher: Unpublished data

Type_of_Source_Media: Digital Data (.tif)
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1978
Ending_Date: 1985

Source_Currentness_Reference: ground condition at time data were collected.

Source_Citation_Abbreviation: AHAP photomosaics
Source_Contribution:

Alaska high altitude aerial photography was used to delineate the presence or absence of tundra vegetation.

Process_Step:

Process_Description:

Vector shapefiles of barrier shorelines from Hamilton and others (2020b) were converted to polygons using the Feature to Polygon tool in ArcGIS 10.7. Barrier polygons and polyline shorelines were used to calculate the following morphometrics of each barrier in each study era: number of islands (in each barrier chain), type (constructed or relict), area, perimeter length, exposed-shoreline length (length of the shoreline on the exposed coast), straight-line length (length between the western- and eastern-most points of the exposed shoreline), sinuosity (the ratio between exposed-shoreline length and straight-line length), width (mean, maximum, minimum, 25th and 75th percentiles), presence or absence of recurved features on either end of the island, presence and number of relict terminus features on either end of the island, presence of tundra vegetation, approximate vegetation cover (for 1980s-era only) and barrier chain orientation (maximum, minimum, mean, median, 25th and 75th percentiles). Elevation metrics, including mean, maximum, minimum, median elevations were extracted for all 2010s-era barrier polygons from 1-m resolution digital surface models derived from the 2010s barrier elevation dataset using the Zonal Statistics as Table tool in ArcMap. The number of barriers in each island chain, barrier area, and perimeter length were calculated from the polygon shapefiles in ArcMap 10.7. Exposed-shoreline and straight-line lengths were then calculated from vector shapefiles. Widths were calculated using transects created with the Digital Shoreline Analysis System (DSAS) v.5 tool (Himmelstoss and others, 2018). Transects were cast with 50-m spacing using existing baselines from Gibbs and others (2017) and Snyder and Gibbs (2019) and then clipped to the barrier perimeter boundary. Width statistics were calculated for each barrier chain and each individual barrier using MATLAB. Barrier chain orientation statistics were also calculated in MATLAB using the X and Y points of transect intersections along the exposed shoreline. Presence of recurved features on either end, as well as the number of relict termini, was visually identified. The presence or absence of tundra vegetation and the approximate percent coverage on individual barriers was determined visually from the 1980s-era, color-infrared AHAP photomosaics, because it was the only data set with a mostly complete and temporally consistent image data set for the study area. Tundra vegetation coverage was interpreted as quartile percentages (0 percent, less than 25 percent, 25-50 percent, 50-75 percent, and greater than 75 percent). For additional information about the data please see Hamilton and others (2020a).

Process_Date: 2020

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 747

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name:

NAD 1983 2011 Alaska Albers (ESRI Full Name: NAD_1983_2011_Alaska_Albers)

Albers_Conical_Equal_Area:

Standard_Parallel: 55.0
Standard_Parallel: 65.0
Longitude_of_Central_Meridian: -154.0
Latitude_of_Projection_Origin: 50.0
False_Easting: 0.0
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 0.6096
Ordinate_Resolution: 0.6096

Planar_Distance_Units: Meter

Geodetic_Model:

Horizontal_Datum_Name: D_NAD_1983_2011
Ellipsoid_Name: GRS_1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Attribute Table
Entity_Type_Definition:

Table containing attribute information associated with the data set.

Entity_Type_Definition_Source: Producer defined

Attribute:

Attribute_Label: Barrier_ID
Attribute_Definition:

Identification number of a single barrier island - randomly assigned

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1
Range_Domain_Maximum: 189

Attribute:

Attribute_Label: BIChain_ID
Attribute_Definition: Barrier chain identification number
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1
Range_Domain_Maximum: 42

Attribute:

Attribute_Label: Era
Attribute_Definition: Analysis era
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1950s
Enumerated_Domain_Value_Definition: Shoreline year 1947 or 1949
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1980s
Enumerated_Domain_Value_Definition: Shoreline year 1978 to 1987
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 2000s
Enumerated_Domain_Value_Definition: Shoreline year 1997 to 2007
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 2010s
Enumerated_Domain_Value_Definition: Shoreline year 2009 to 2016
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 2020s
Enumerated_Domain_Value_Definition: Shoreline year 2016 to 2019
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute:

Attribute_Label: P_Year
Attribute_Definition:

Predominant shoreline year, if more than one, used for classification of barrier polygon

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1947
Range_Domain_Maximum: 2019
Attribute_Units_of_Measure: year
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: T_Years
Attribute_Definition:

All shoreline years composing a barrier shoreline. Some polygons consist of shorelines from more than one year.

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1947
Range_Domain_Maximum: 2019
Attribute_Units_of_Measure: year
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: Shoretype
Attribute_Definition: Type of barrier feature
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Barrier beach
Enumerated_Domain_Value_Definition: Sand or gravel deposit extending across a body of water
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Barrier island
Enumerated_Domain_Value_Definition:

Offshore deposits of sand or sediment that run parallel to the coastline

Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Barrier spit
Enumerated_Domain_Value_Definition:

Sand or gravel deposit extending from the mainland into a body of water

Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute:

Attribute_Label: Type
Attribute_Definition: Type of barrier
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Constructed
Enumerated_Domain_Value_Definition: Constructed barrier, no tundra vegetation present
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: N
Enumerated_Domain_Value_Definition: Unable to determine barrier type
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Remnant
Enumerated_Domain_Value_Definition: Relict tundra vegetation present
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute:

Attribute_Label: Tundra
Attribute_Definition:

Tundra vegetation present or absent as determined from the 1980s-era imagery

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: {Null Value / Empty Field Entry}
Enumerated_Domain_Value_Definition:

Tundra presence or absence was not determined for features of this Era

Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: A
Enumerated_Domain_Value_Definition: Tundra vegetation in 1980s era imagery is absent
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: P
Enumerated_Domain_Value_Definition: Tundra vegetation in 1980s era imagery is present
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute:

Attribute_Label: Veg_area
Attribute_Definition:

Approximate percentage of total area covered by tundra vegetation, when present, as determined from 1980s-era imagery

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: {Null Value / Empty Field Entry}
Enumerated_Domain_Value_Definition:

Tundra vegetation percent was not determined for for features of this Era

Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 0%
Enumerated_Domain_Value_Definition: 0 percent tundra vegetation present
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: <25%
Enumerated_Domain_Value_Definition: Less than 25 percent tundra vegetation present
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 25% to 50%
Enumerated_Domain_Value_Definition: 25 to 50 percent tundra vegetation present
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 50% to 75%
Enumerated_Domain_Value_Definition: 50 to 75 percent tundra vegetation present
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: >75%
Enumerated_Domain_Value_Definition: Greater than 75 percent tundra vegetation present
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute:

Attribute_Label: Total_Isla
Attribute_Definition:

Total number of islands in a barrier chain during the specified analysis era

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1
Range_Domain_Maximum: 21

Attribute:

Attribute_Label: Recurv
Attribute_Definition:

Presence, absence, and location of recurved features on the barrier

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 0
Enumerated_Domain_Value_Definition: No recurved feature
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1
Enumerated_Domain_Value_Definition: Recurved feature on the east end of the barrier
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 2
Enumerated_Domain_Value_Definition: Recurved feature on the west end of the barrier
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 3
Enumerated_Domain_Value_Definition: Recurved feature on the north end of the barrier
Enumerated_Domain_Value_Definition_Source: Producer defined

Attribute:

Attribute_Label: REast_term
Attribute_Definition: Total number of active termini on eastern end of barrier
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0
Range_Domain_Maximum: 9

Attribute:

Attribute_Label: RWest_term
Attribute_Definition: Total number of active termini on western end of barrier
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0
Range_Domain_Maximum: 5

Attribute:

Attribute_Label: Total_tran
Attribute_Definition:

Total number of transects used in orientation data for each barrier

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 26
Range_Domain_Maximum: 1517

Attribute:

Attribute_Label: Area
Attribute_Definition: Area of barrier in square meters
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 17.899
Range_Domain_Maximum: 9818190.555
Attribute_Units_of_Measure: Square meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Area_leng
Attribute_Definition:

Area (square meters) per length (meters) of shorelines in barrier chain

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 33.11
Range_Domain_Maximum: 412.57
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Chain_Area
Attribute_Definition:

Total area of all exposed barriers in a single barrier chain, in square meters

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 8991.90
Range_Domain_Maximum: 13645176.60
Attribute_Units_of_Measure: square meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Chain_leng
Attribute_Definition:

Total exposed barrier shoreline length within a single barrier chain, in meters

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1689.06
Range_Domain_Maximum: 52703.58
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Perimeter
Attribute_Definition: Perimeter of barrier polygon in meters
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 16.57
Range_Domain_Maximum: 1051615.69
Attribute_Units_of_Measure: Meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Shore_leng
Attribute_Definition:

Length of exposed shoreline in meters; -9999 indicates the metric was not calculated (NoData)

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 33.04
Range_Domain_Maximum: 32687.08
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Cross_leng
Attribute_Definition:

Cross shore/straight line length of shoreline in meters; -9999 indicates the metric was not calculated (NoData)

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 28.09
Range_Domain_Maximum: 31441.42
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Sinuosity
Attribute_Definition:

Ratio between exposed shore length (shore_leng) and cross shore length (cross_leng), in meters; -9999 indicates the metric was not calculated (NoData)

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.03
Range_Domain_Maximum: 2.73
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Min_width
Attribute_Definition:

Minimum width of barrier based on transects spaced at 50-meter intervals; -9999 indicates the metric was not calculated (NoData)

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.12
Range_Domain_Maximum: 918.29
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Max_width
Attribute_Definition:

Maximum width of barrier based on transects spaced at 50-meter intervals; -9999 indicates the metric was not calculated (NoData)

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3.08
Range_Domain_Maximum: 1127.50
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Avg_width
Attribute_Definition:

Mean width of barrier based on transects spaced at 50-meter intervals; -9999 indicates the metric was not calculated (NoData)

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3.08
Range_Domain_Maximum: 927.34
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: P25_width
Attribute_Definition:

25th percentile width of barrier based on transects spaced at 50-meter intervals; -9999 indicates the metric was not calculated (NoData)

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2.19
Range_Domain_Maximum: 920.83
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: P75_width
Attribute_Definition:

75th percentile width of barrier based on transects spaced at 50-meter intervals; -9999 indicates the metric was not calculated (NoData)

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3.08
Range_Domain_Maximum: 933.58
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Min_orient
Attribute_Definition: Minimum orientation angle of barriers in a chain
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 90.00
Range_Domain_Maximum: 215.64
Attribute_Units_of_Measure: cardinal degrees
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Max_orient
Attribute_Definition: Maximum orientation angle of barriers in a chain
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 119.05
Range_Domain_Maximum: 270.00
Attribute_Units_of_Measure: cardinal degrees
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Med_orient
Attribute_Definition: Median orientation angle of barriers in a chain
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 104.80
Range_Domain_Maximum: 250.41
Attribute_Units_of_Measure: cardinal degrees
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Ave_orient
Attribute_Definition: Mean or average orientation angle of barriers in a chain
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 105.53
Range_Domain_Maximum: 244.71
Attribute_Units_of_Measure: cardinal degrees
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Skw_orient
Attribute_Definition: Skewness of orientation angle of barrier chain
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -6.25
Range_Domain_Maximum: 10.32
Attribute_Units_of_Measure: cardinal degrees
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: P25_orient
Attribute_Definition: 25th percentile of barrier chain orientation
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 96.05
Range_Domain_Maximum: 244.30
Attribute_Units_of_Measure: cardinal degrees
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: P75_orient
Attribute_Definition: 25th percentile of barrier chain orientation
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 108.21
Range_Domain_Maximum: 264.28
Attribute_Units_of_Measure: cardinal degrees
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Min_elev
Attribute_Definition:

Minimum 2010s-era barrier elevation; -9999 indicates the metric was not calculated (NoData)

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -1.00
Range_Domain_Maximum: 0.13
Attribute_Units_of_Measure: meters relative to the experimental geoid xGEOID17b
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Max_elev
Attribute_Definition:

Maximum 2010s-era barrier elevation; -9999 indicates the metric was not calculated (NoData)

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.13
Range_Domain_Maximum: 8.20
Attribute_Units_of_Measure: meters relative to the experimental geoid xGEOID17b
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Avg_elev
Attribute_Definition:

Average 2010s-era barrier elevation; -9999 indicates the metric was not calculated (NoData)

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -0.26
Range_Domain_Maximum: 3.99
Attribute_Units_of_Measure: meters relative to the experimental geoid xGEOID17b

Overview_Description:

Entity_and_Attribute_Overview:

The entity and attribute information provided here describes the tabular data associated with the data set. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the data set.

Entity_and_Attribute_Detail_Citation:

The entity and attribute information were generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - ScienceBase

Contact_Address:

Address_Type: Mailing and Physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225

Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov

Resource_Description:

These data are available in shapefile format contained in a single zip file, which also includes CSDGM FGDC-compliant metadata.

Distribution_Liability:

Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Shapefile
Format_Version_Number: ArcGIS Desktop 10.7
Format_Specification: Esri polygon shapefile
Format_Information_Content:

Zip file contains digitized shoreline position representing the land/water interface of barrier islands and spits on the northern coast of Alaska.

File_Decompression_Technique: Use WinZip or equivalent.
Transfer_Size: 3.1

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/5f8f1b8582ce06b040efc901

Network_Resource_Name:

https://www.sciencebase.gov/catalog/item/5f8f1b8582ce06b040efc901

Network_Resource_Name: https://doi.org/10.5066/P90EQ1H7

Access_Instructions:

Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download the zipped file of data and metadata. The second link points to a landing page for the barrier polygon data and metadata. The third link points to the landing page for the entire data release.

Fees: None.

Technical_Prerequisites:

This zip file contains data available in Environmental Systems Research Institute (Esri) polygon shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from Esri at www.esri.com.

Metadata_Reference_Information:

Metadata_Date: 20210812
Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Person: PCMSC Science Data Coordinator

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_P90EQ1H7/BarrierPolygons1947to2019_metadata.html>