Digital Shoreline Analysis System version 4.3 shoreline intersection points used to calculate short-term (End Point Rate) shoreline change statistics within the Nantucket coastal region including the Nantucket Sound- and Atlantic Ocean- facing coasts of Nantucket, Muskeget and Tuckernuck Islands (Nantucket_intersects_STepr.shp)

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Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 2013
Title:

Digital Shoreline Analysis System version 4.3 shoreline intersection points used to calculate short-term (End Point Rate) shoreline change statistics within the Nantucket coastal region including the Nantucket Sound- and Atlantic Ocean- facing coasts of Nantucket, Muskeget and Tuckernuck Islands (Nantucket_intersects_STepr.shp)

Geospatial_Data_Presentation_Form: vector digital data
Series_Information:

Series_Name: Open-File Report
Issue_Identification: 2012-1183

Publication_Information:

Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: https://doi.org/10.3133/ofr20121183
Online_Linkage: https://pubs.usgs.gov/of/2012/1183/
Online_Linkage:

https://pubs.usgs.gov/of/2012/1183/data/Nantucket/Nantucket_intersects_STepr.zip

Larger_Work_Citation:

Citation_Information:

Originator: Theresa L. Smith
Originator: Emily A. Himmelstoss
Originator: E. Robert Thieler
Publication_Date: 2013
Title:

Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the 2013 update

Series_Information:

Series_Name: Open-File Report
Issue_Identification: 2012-1183

Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Online_Linkage: https://pubs.usgs.gov/of/2012/1183/

Description:

Abstract:

Due to continued coastal population growth and increased threats of erosion, current data on trends and rates of shoreline movement are required to inform shoreline and floodplain management. The Massachusetts Office of Coastal Zone Management launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast. In 2001, a 1994 shoreline was added to calculate both long- and short-term shoreline change rates at 40-meter intervals along ocean-facing sections of the Massachusetts coast.
The Coastal and Marine Geology Program of the U.S. Geological Survey (USGS) in cooperation with the Massachusetts Office of Coastal Zone Management, has compiled reliable historical shoreline data along open-facing sections of the Massachusetts coast under the Massachusetts Shoreline Change Mapping and Analysis Project 2013 Update. Two oceanfront shorelines for Massachusetts (approximately 1,800 km in total length) were (1) delineated using 2008/09 color aerial orthoimagery, and (2) extracted from topographic LIDAR datasets (2007) obtained from NOAA's Ocean Service, Coastal Services Center. The new shorelines were integrated with existing Massachusetts Office of Coastal Zone Management and USGS historical shoreline data in order to compute long- and short-term rates using the latest version of the Digital Shoreline Analysis System (DSAS).

Purpose:

This dataset contains the measurement locations used by the Digital Shoreline Analysis System (DSAS) software to compute short-term end point rate (EPR) of change statistics for the Nantucket region of Massachusetts where there was not enough historic data to compute a linear regression rate (LRR). The points represent the individual shoreline locations along each measurement transect generated by DSAS. The data can be used to identify the number of shorelines used to compute rates at a given location as well as the specific shoreline dates. Short-term end point statistics were calculated for approximately the last three decades using historical shoreline data that begins with the 1970-1982 time period and ends with the 2008-2009 shorelines compiled for the Massachusetts Office of Coastal Zone Management Shoreline Change Project.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2013

Currentness_Reference: publication date

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -70.310792
East_Bounding_Coordinate: -70.012205
North_Bounding_Coordinate: 41.344901
South_Bounding_Coordinate: 41.276901

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:8679fdd7-bd2c-4115-afa2-67b17fce5849

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Esri point shapefile
Theme_Keyword: Shoreline
Theme_Keyword: Historic Shoreline
Theme_Keyword: short-term
Theme_Keyword: Shoreline Change Rate
Theme_Keyword: Erosion
Theme_Keyword: Accretion
Theme_Keyword: Intersects
Theme_Keyword: Measurement Locations
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: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: Massachusetts Office of Coastal Zone Management

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geospatial datasets
Theme_Keyword: coastal processes

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Atlantic Coast
Place_Keyword: United States
Place_Keyword: New England
Place_Keyword: Massachusetts
Place_Keyword: Nantucket
Place_Keyword: Nantucket Sound
Place_Keyword: Muskeget Island
Place_Keyword: Tuckernuck Island

Access_Constraints: None
Use_Constraints:

These data were automatically generated using the DSAS version 4.3 software application and should only be used for purposes explicitly stated by the originating organization. Please recognize the U.S. Geological Survey (USGS) and the Massachusetts Office of Coastal Zone Management as the originators of this dataset.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Theresa Smith

Contact_Position: Contract Geologist
Contact_Address:

Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA

Contact_Voice_Telephone: 508-548-8700
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: theresasmith@usgs.gov

Native_Data_Set_Environment:

Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.1850

Cross_Reference:

Citation_Information:

Originator: E.R. Thieler
Originator: T.L. Smith
Originator: Julia Knisel
Originator: D.W. Sampson
Publication_Date: 2013
Title:

Massachusetts Shoreline Change Mapping and Analysis Project, 2013 Update

Series_Information:

Series_Name: Open-File Report
Issue_Identification: 2012-1189

Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Online_Linkage: https://pubs.usgs.gov/of/2012/1189/

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: Reston, VA
Publisher: U.S. Geological Survey

Other_Citation_Details: Current version is 4.3
Online_Linkage: https://pubs.er.usgs.gov/publication/ofr20081278

Cross_Reference:

Citation_Information:

Originator: E. Robert Thieler
Originator: James F. O'Connell
Originator: Courtney A. Schupp
Publication_Date: 20010904
Title:

The Massachusetts Shoreline Change Project: 1800s to 1994 Technical Report

Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Other_Citation_Details: Administrative Report
Online_Linkage: http://www.mass.gov/czm/hazards/pdf/sc_technical_report.pdf
Online_Linkage:

http://www.mass.gov/czm/hazards/shoreline_change/shorelinechangeproject.htm

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 calculation of shoreline change rates performed by the software.

Logical_Consistency_Report:

These data were generated using DSAS v.4.3, an automated software program which does not perform checks for fidelity of the input features. The measurement locations are generated during the rate calculation process, after editing of the transects is complete.

Completeness_Report:

This dataset contains the measurement locations automatically established by the DSAS software application and were used to calculate short-term end point rate shoreline change rates for the region where there was not enough historic data to compute a linear regression rate (LRR). Historical shoreline data older than 1970 were excluded from the rate calculations as the short-term period is defined as 1970-2009. These data are part of a state-wide assessment of shoreline change that includes over 26,500 individual transect locations that were used to compute both short- and long-term rates of change, based on almost 9200 linear kilometers of historical shoreline position data. It is very likely that some gross errors or blunders were introduced during compilation and analysis of this large amount of information. Such errors have been described in the context of shoreline change mapping as coarse errors (Fenster and others, 2001) and can generally be considered to affect only a very small percentage of the overall dataset.
Fenster, M.S., Dolan, R., and Morton, R.A., 2001, Coastal storms and shoreline change: signal or noise?: Journal of Coastal Research, v. 17, no. 3, p. 714-720. .

Lineage:

Process_Step:

Process_Description:

Rate Calculations Performed using DSAS v4.3 for ArcMap 10 on Selected Shoreline Features Only (shoreline years 1970-2009). Parameters Used: shoreline layer=Nantucket_shorelines, shoreline date field=Date_, shoreline uncertainty field name=Uncy (additional shoreline data stored in Nantucket_shoreline_uncertainty.dbf), the default accuracy=10.8 meters, shoreline intersection parameters=nearest, stats calculations=[Shoreline Change Envelope (SCE), Net Shoreline Movement (NSM), End Point Rate (EPR)], shoreline threshold=2, confidence interval=90%, Output rate table name=Nantucket_transects_rates_20121024_131011.dbf. Output intersects table name=Nantucket_transects_intersect_20121024_131011.dbf.
This process step and all subsequent process steps were performed by Theresa Smith.

Process_Date: 20121024
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Theresa Smith
Contact_Organization: U.S. Geological Survey

Contact_Position: Contract Geologist
Contact_Address:

Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA

Contact_Voice_Telephone: 508-548-8700
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: theresasmith@usgs.gov

Process_Step:

Process_Description:

The shoreline intersects output table contains X- and Y-coordinate information for each shoreline measurement on DSAS transects. This table (Nantucket_transects_intersect_20121024_131011.dbf) was used to create a temporary event theme to preview the transect/shoreline measurement locations in ArcMap. The intersects file was right-clicked in the ArcMap (v.10) table of contents. "Display XY data..." was chosen from the pop-up menu. A new Display XY Data window opens and the following parameters were entered: X Field: IntersectX; Y Field; Intersect Y; Z Field: <None>; Coordinate System of Input Coordinates: NAD_1983_Massachusetts_Mainland_FIPS_2001.

Process_Date: 20121024

Process_Step:

Process_Description:

The temporary event theme is saved to a shapefile by right-clicking the Nantucket_transects_intersect_20121024_131011 Events layer in the table of contents (ArcMap 10) and choosing Data > Export Data from the pop-up menu. This opens an Export Data window where the following parameters were entered: Export: All features; Select "Use the same coordinate system as this layer's source data"; Output feature class: Nantucket _intersects_STepr.shp.

Process_Date: 20121024

Process_Step:

Process_Description:

For the MA Shoreline Change Update, linear regression was the preferred method for calculating short-term shoreline change rates. However, not all transects intersected three shorelines, which is required for the calculation of linear regression rates. For sections in which linear regression rates were not calculated, end point rates (calculated using two shorelines) were reported. The end point intersects output feature class was clipped to the linear regression rates output feature class during an edit session in ArcMap v. 10 by (1) the end point intersects output table was joined to the transect feature class by right-clicking on the transect layer > joins and relates > join > join attributes from a table, (2) transects in which both end point rates and linear regression rates were calculated were selected from the joined attribute table by choosing from the drop down menu Select By Attributes. Parameters: Create a new selection; select from joined table: Nantucket_intersects_STepr.TransectID>=0 AND Nantucket_rates_transects_STlr.TransectID >=0 and (3) the selected attributes were deleted from the end point rates output table.

Process_Date: 20121127

Process_Step:

Process_Description:

The exported transect shapefile was projected in Esri's ArcToolbox (v.10) > Data Management Tools > Projections and Transformations > Feature > Project. Parameters: input projection - NAD_1983_StatePlane_Massachusetts_Mainland_FIPS_2001; output projection - geographic coordinates (NAD83); transformation - none.

Process_Date: 20121127

Process_Step:

Process_Description:

Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Attempted to modify http to https where appropriate. Added a landing page link as the first link in the identification section. Fixed online link to DSAS cross-reference. The distribution format name was modified in an attempt to be more consistent with other metadata files of the same data format. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent.

Process_Date: 20171011
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Process_Step:

Process_Description: USGS Thesaurus keywords added to the keyword section.
Process_Date: 20180720
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Process_Step:

Process_Description: Crossref DOI link was added as the first link in the metadata.
Process_Date: 20191118
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Process_Step:

Process_Description:

Added keywords section with USGS persistent identifier as theme keyword.

Process_Date: 20200908
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 496

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Nantucket_intersects_STepr
Entity_Type_Definition:

Measurement points used to calculate short-term shoreline change statistics

Entity_Type_Definition_Source: U.S. Geological Survey

Attribute:

Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number used within geodatabase.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: TransectId
Attribute_Definition:

Used as a permanent and unique identification number (same as ObjectID field in Transect attribute table) for each transect calculated by DSAS. This attribute was used as the common field when joining the intersects table (.dbf) to the transect feature class in a geodatabase.