Digital Shoreline Analysis System (DSAS) version 4.3 transects with end-point rate calculations for exposed shorelines between Point Barrow and Icy Cape for the time period 1947 to 2012

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2015
Title:
Digital Shoreline Analysis System (DSAS) version 4.3 transects with end-point rate calculations for exposed shorelines between Point Barrow and Icy Cape for the time period 1947 to 2012
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2015-1030
Publication_Information:
Publication_Place:
Pacific Coastal and Marine Science Center, Santa Cruz and Menlo Park, CA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage:
https://pubs.usgs.gov/of/2015/1030/downloads/EastChukchi_exposed_transects.zip
Larger_Work_Citation:
Citation_Information:
Originator: Ann E. Gibbs
Publication_Date: 2015
Title:
National Assessment of Shoreline Change: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the North Coast of Alaska, U.S.-Canadian Border to Icy Cape
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2015-1030
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/of/2015/1030/
Description:
Abstract:
The Arctic Coastal Plain of northern Alaska is an area of strategic economic importance to the United States, is home to remote Native American communities, and encompasses unique habitats of global significance. Coastal erosion along the north coast of Alaska is chronic, widespread, may be accelerating, and is threatening defense and energy-related infrastructure, natural shoreline habitats, and Native communities. There is an increased demand for accurate information regarding past and present shoreline changes across the United States. To meet these national needs, the Coastal and Marine Geology Program of the U.S. Geological Survey (USGS) is compiling existing reliable historical shoreline data along sandy shores of the conterminous United States and parts of Alaska and Hawaii under the National Assessment of Shoreline Change project. There is no widely accepted standard for analyzing shoreline change. Existing shoreline data measurements and rate calculation methods vary from study to study and prevent combining results into state-wide or regional assessments. The impetus behind the National Assessment project was to develop a standardized method of measuring changes in shoreline position that is consistent from coast to coast. The goal was to facilitate the process of periodically and systematically updating the results in an internally consistent manner.
Purpose:
This dataset consists of shoreline change rates for the north coast of Alaska between Point Barrow and Icy Cape. Rate calculations were computed within a GIS using the Digital Shoreline Analysis System (DSAS) version 4.3, an ArcGIS extension developed by the U.S. Geological Survey. Rates of shoreline change were calculated using an end-point rate method based on shorelines between 1947 and 2012 to provide an approximately 65-yr rate. A reference baseline was used as the originating point for the orthogonal transects cast by the DSAS software. The transects intersect each shoreline establishing measurement points, which are then used to calculate change rates.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1947
Ending_Date: 2012
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -161.956503072
East_Bounding_Coordinate: -156.468395224
North_Bounding_Coordinate: 71.3900102677
South_Bounding_Coordinate: 70.2843959875
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: Shoreline
Theme_Keyword: Historic Shoreline
Theme_Keyword: Shoreline Change Rate
Theme_Keyword: Erosion
Theme_Keyword: Accretion
Theme_Keyword: End-point Rate
Theme_Keyword: Baseline
Theme_Keyword: Transect
Theme_Keyword: Digital Shoreline Analysis System
Theme_Keyword: DSAS
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: environment
Theme_Keyword: geoscientificInformation
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: North Slope
Place_Keyword: Beaufort Sea
Place_Keyword: Barrow
Place_Keyword: Demarcation Bay
Place_Keyword: Jago River
Place_Keyword: Staines River
Place_Keyword: Sagavanirktok River
Place_Keyword: Colville River
Place_Keyword: Cape Halkett
Place_Keyword: Harrison Bay
Place_Keyword: Drew Point
Place_Keyword: Tangent Point
Place_Keyword: Smith Bay
Place_Keyword: Elson Lagoon
Place_Keyword: Peard Bay
Place_Keyword: Alaska
Place_Keyword: Arctic National Wildlife Refuge
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: United States
Place_Keyword: Arctic
Place_Keyword: National Petroleum Reserve-Alaska
Place_Keyword: NPR-A
Place_Keyword: ANWR
Access_Constraints: None
Use_Constraints:
This information is not intended for navigational purposes. Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data. Acknowledge the U.S. Geological Survey in products derived from these data. Share data products developed using these data with the U.S. Geological Survey. This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Although this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Ann E. Gibbs
Contact_Address:
Address_Type: mailing and physical address
Address: Pacific Coastal and Marine Science Center
Address: 400 Natural Bridges Dr.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA
Contact_Voice_Telephone: 831-460-7540
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: agibbs@usgs.gov
Native_Data_Set_Environment:
Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 10.1 (Build 3035) Service Pack 1 (Build 3143)
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
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2015-1030
Publication_Information:
Publication_Place: Santa Cruz, CA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: https://pubs.usgs.gov/of/2015/1030/
Cross_Reference:
Citation_Information:
Originator: E.R. Thieler
Originator: E.A. Himmelstoss
Originator: J.L. Zichichi
Originator: A. Ergul
Publication_Date: 2009
Title:
Digital Shoreline Analysis System (DSAS) version 4.0 - An ArcGIS extension for calculating shoreline change
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2008-1278
Publication_Information:
Publication_Place: Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Other_Citation_Details: Current version at time of use was 4.3
Online_Linkage: http://woodshole.er.usgs.gov/project-pages/dsas/
Online_Linkage:
http://woodshole.er.usgs.gov/project-pages/dsas/version4/
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The attributes of this dataset are based on the field requirements of the Digital Shoreline Analysis System and were automatically generated by the software during the generation of the transect layer or during the calculation of shoreline change rates performed by the software.
Logical_Consistency_Report:
These data were generated using DSAS v4.3, an automated software program which does not perform checks for fidelity of the input features. The transects were visually inspected and sometimes manually adjusted within a standard ArcMap edit session to adjust the position at which an individual transect intersected the shorelines.
Completeness_Report:
This dataset contains the transects automatically generated by the DSAS software application that were used to calculate shoreline change rates along sections of the north coast of Alaska, between the U.S.-Canadian border and Icy Cape, where shoreline position data were available. Additional transects may have been generated but did not intersect the shoreline dates specified.
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.
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:
Process_Step:
Process_Description:
Transect Features Generated using DSAS v4.2 in ArcMap v9.3. Parameters Used: baseline layer=UTMX_Baseline, transect spacing=50 meters, transect length=500m, cast direction=onshore, baseline location=offshore, cast method=smoothed, smoothing distance=50 meters. For additional details on these parameters, please see the DSAS help file distributed with the DSAS software, or visit the USGS website at: https://pubs.usgs.gov/of/2008/1278/
Process_Date: 2012
Process_Step:
Process_Description:
Some transects did not intersect all shorelines at the default transect length. These transects were manually lengthened in an edit session using standard editing tools in ArcMap v10.1. Some transects intersected the shorelines at an oblique angle. These transects were manually adjusted to a more shore-normal position in an edit session using standard editing tools in ArcMap v9.3.
Process_Date: 2012
Process_Step:
Process_Description:
Rate calculations performed in DSAS v4.3 using ArcMap v10.1 on selected shoreline features. Parameters Used: shoreline layer= Shorelines_EastChukchi, shoreline date field=DATE_, shoreline uncertainty field name=Uncy, the default accuracy= 0 meters, shoreline intersection parameters=nearest, stats calculations=[End Point Rate (EPR)], shoreline threshold=2, confidence interval=90%, Output rate table name= Transects_EastChukchi_Exposed_rates_20141008_162633
Process_Date: 20141008
Process_Step:
Process_Description:
Shoreline rates table (Transects_EastChukchi_Exposed_rates_20141008_162633) was joined to the transect feature class in ArcMap v10.1 by right-clicking on the transect layer > joins and relates > join > join attributes from a table. Parameters: join field - ObjectID; table to join - Transects_EastChukchi_Exposed_rates_20141008_162633; field in table: TransectID; join options - keep only matching records.
Process_Date: 20141008
Process_Step:
Process_Description:
The joined transect feature class was exported to a shapefile in ArcMap v10.1 by right-clicking the transect layer > data > export data, permanently linking the joined rate fields to the transect attribute table.
Process_Date: 20141008
Process_Step:
Process_Description:
The exported transect shapefile was projected in Esri's ArcToolbox (v.10.1) > Data Management Tools > Projections and Transformations > Feature > Project. Parameters: input projection - UTM zone XN (NAD83; where X is the corresponding UTM Zone); output projection - geographic coordinates (WGS84); transformation = WGS_1984_(ITRF00)_To_NAD_1983.
Process_Date: 20141008
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 5022
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0196082030
Longitude_Resolution: 0.0572840268
Geographic_Coordinate_Units: Decimal seconds
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563
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: OBJECTID
Attribute_Definition:
Internal feature number generated for each row of the transect attribute table when stored as a feature class in a geodatabase. This value is the common attribute field when joining to the TransectID value in short-term results output table calculated by DSAS.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 241
Range_Domain_Maximum: 5463
Attribute:
Attribute_Label: BaselineID
Attribute_Definition:
Unique identification number of the baseline segment. If BaselineID=0 no transects will be generated. Used by DSAS to determine transect ordering alongshore if multiple baseline segments exist.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 9
Attribute:
Attribute_Label: Group_
Attribute_Definition:
Region ID as defined in Gibbs and Richmond (Cross referenced in this report)
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 8
Enumerated_Domain_Value_Definition: Dease Inlet to Barrow
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 9
Enumerated_Domain_Value_Definition: Barrow to Peard Bay
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 10
Enumerated_Domain_Value_Definition: Peard Bay to Icy Cape
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute:
Attribute_Label: TransOrder
Attribute_Definition:
Assigned by DSAS based on ordering of transects along the baseline. Used to allow user to sort transect data along the baseline from baseline start to baseline end.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 5099
Attribute:
Attribute_Label: ProcTime
Attribute_Definition:
Assigned by DSAS automatically to record the date and time a transect was processed.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Unknown
Attribute:
Attribute_Label: Autogen
Attribute_Definition:
Assigned by DSAS to indicate whether or not a transect was automatically created by DSAS (1= transect was auto generated by DSAS; blank or 0=transect was not auto-generated).
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 0
Enumerated_Domain_Value_Definition: Unknown
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 1
Enumerated_Domain_Value_Definition: Transect was auto generated by DSAS
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute:
Attribute_Label: StartX
Attribute_Definition:
Assigned by DSAS automatically to record the X coordinate of the beginning of the transect in meter units
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 388839.46
Range_Domain_Maximum: 589686.43
Attribute:
Attribute_Label: StartY
Attribute_Definition:
Assigned by DSAS automatically to record the Y coordinate of the beginning of the transect in meter units
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 7799590.16
Range_Domain_Maximum: 7922716.21
Attribute:
Attribute_Label: EndX
Attribute_Definition:
Assigned by DSAS automatically to record the X coordinate of the end of the transect in meter units
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 389282.23
Range_Domain_Maximum: 590199.19
Attribute:
Attribute_Label: EndY
Attribute_Definition:
Assigned by DSAS automatically to record the Y coordinate of the end of the transect in meter units
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 7799245.82
Range_Domain_Maximum: 7922412.88
Attribute:
Attribute_Label: Azimuth
Attribute_Definition:
Assigned by DSAS to record the azimuth of the transect measure in degrees clockwise from North. When zero, transect was manually created by user.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 104.93
Range_Domain_Maximum: 253.1
Attribute:
Attribute_Label: ShoreType
Attribute_Definition: User defined shoreline type
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Exposed Barrier Beach
Enumerated_Domain_Value_Definition: Unknown
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Exposed Barrier Island
Enumerated_Domain_Value_Definition: Unknown
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Exposed Barrier Spit
Enumerated_Domain_Value_Definition: Unknown
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Exposed Mainland
Enumerated_Domain_Value_Definition: Unknown
Enumerated_Domain_Value_Definition_Source: Producer defined
Attribute:
Attribute_Label: SHAPE_Leng
Attribute_Definition: Length of feature in meter units
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 117.652782719
Range_Domain_Maximum: 842.310786497
Attribute_Units_of_Measure: meter
Attribute:
Attribute_Label: TransectId
Attribute_Definition:
Same value as ObjectID. Used as a permanent and unique identification number for each transect in the output rates table calculated by DSAS. This attribute was used as the common field when joining the rates table (.dbf) to the transect feature class in a geodatabase.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 241
Range_Domain_Maximum: 5463
Attribute:
Attribute_Label: EPR
Attribute_Definition:
The end point rate is calculated by dividing the distance of shoreline movement by the time elapsed between the two shorelines. The rate is reported in meters per year with positive values indicating accretion and negative values indicating erosion.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -8.5
Range_Domain_Maximum: 8.05
Attribute_Units_of_Measure: meters per year
Attribute:
Attribute_Label: ECI
Attribute_Definition:
Describes the uncertainty of the reported end point rate in meters. The shoreline uncertainties for the two positions used in the end point calculation are each squared, then added together (summation of squares). The square root of the summation of squares is divided by the number of years between the two shorelines. This result is reported as the confidence of the end point rate calculation (ECI).
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.267
Range_Domain_Maximum: 0.295
Overview_Description:
Entity_and_Attribute_Overview:
All calculations for length are in meter units and were based on the coincident UTM zone WGS84
Entity_and_Attribute_Detail_Citation: Unknown
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: Pacific Coastal and Marine Science Center
Address: 400 Natural Bridges Dr.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA
Contact_Voice_Telephone: 831-460-7540
Contact_Facsimile_Telephone: 831-427-4748
Resource_Description: EastChukchi_exposed_transects.shp
Distribution_Liability:
This information is not intended for navigational purposes. This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: vector digital data
Format_Version_Number: 9.0
Format_Specification: Esri polyline shapefile
Format_Information_Content:
This WinZip file contains a shapefile of transects generated by the Digital Shoreline Analysis System including short-term rate calculations for the Alaska North Coast region from the U.S.-Canadian border to Icy Cape.
File_Decompression_Technique: Use WinZip or pkUnzip
Transfer_Size: 0.396
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://pubs.usgs.gov/of/2015/1030/downloads/EastChukchi_exposed_transects.zip
Access_Instructions: Data are downloadable via the World Wide Web (WWW).
Fees: None
Technical_Prerequisites:
This zip file contains data available in Environmental Systems Research Institute (Esri) polyline 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: 20141125
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Ann E. Gibbs
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: Pacific Coastal and Marine Science Center
Address: 400 Natural Bridges Dr.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA
Contact_Voice_Telephone: 831-460-7540
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: agibbs@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

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