Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2018 Title: Uncertainty table for lidar-derived shorelines used when calculating rates in the Digital Shoreline Analysis System software for the south shore of Nantucket, MA Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9O7S72B 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/10.5066/P9O7S72B Online_Linkage: https://www.sciencebase.gov/catalog/item/5ee259fc82ce3bd58d7e13af Larger_Work_Citation: Citation_Information: Originator: Emily A. Himmelstoss Originator: Amy S. Farris Originator: Kathryn M. Weber Publication_Date: 2018 Title: Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines for the 2018 update Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9O7S72B Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Himmelstoss, E.A., Farris, A.S., and Weber, K.M., 2018, Massachusetts shoreline change project—A GIS compilation of vector shorelines for the 2018 update: U.S. Geological Survey data release, https://doi.org/10.5066/P9O7S72B. Online_Linkage: https://doi.org/10.5066/P9O7S72B Online_Linkage: https://www.sciencebase.gov/catalog/item/5bcde5dce4b0f0758fc178d0 Description: Abstract: The Massachusetts Office of Coastal Zone Management launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast. The shoreline position and change rate are used to inform management decisions regarding the erosion of coastal resources. 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. In 2013 two oceanfront shorelines for Massachusetts were added using 2008-2009 color aerial orthoimagery and 2007 topographic lidar datasets obtained from NOAA's Ocean Service, Coastal Services Center. This 2018 update includes two new mean high water (MHW) shorelines for the Massachusetts coast extracted from lidar data collected between 2010-2014. The first new shoreline for the state includes data from 2010 along the North Shore and South Coast from lidar data collected by the U.S. Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX). Shorelines along the South Shore and Outer Cape are from 2011 lidar data collected by the U.S. Geological Survey's (USGS) National Geospatial Program Office. Shorelines along Nantucket and Martha’s Vineyard are from a 2012 U.S. Army Corps of Engineers Post Sandy Topographic lidar survey. The second new shoreline for the North Shore, Boston, South Shore, Cape Cod Bay, Outer Cape, South Cape, Nantucket, Martha’s Vineyard, and South Coast west of Buzzards Bay is from 2013-2014 lidar data collected by the U.S. Geological Survey's (USGS) Coastal and Marine Geology Program. Shorelines were extracted from these lidar surveys using several different methods dependent on the location of the shoreline and whether or not wave data were available. Purpose: This table includes: measurement and positional errors associated with the south shore of Nantucket, a proxy-datum bias value that corrects for the unidirectional offset between the mean high water (MHW) elevation of the lidar and other high water line (HWL) shorelines, as well as a measurement uncertainty in the total water level. The dataset contains a common attribute with the M-values stored for the lidar data within the Nantucket_pShoreline_2012.shp and Nantucket_pShoreline_2013.shp. These data are used in conjunction with the shoreline files to calculate rates of shoreline change. Supplemental_Information: Cross-referenced citations are applicable to the dataset as a whole. Additional citations are located within individual process steps that pertain specifically to the method described in that step. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20131128 Currentness_Reference: ground condition of the shorelines on which these values are based Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.23364182 East_Bounding_Coordinate: -69.96028349 North_Bounding_Coordinate: 41.39209974 South_Bounding_Coordinate: 41.23902568 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5ee259fc82ce3bd58d7e13af Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: environment Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: USGS Theme_Keyword: U.S. Geological Survey Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: Massachusetts Coastal Zone Management Theme_Keyword: MA CZM Theme_Keyword: National Assessment of Shoreline Change Project Theme_Keyword: Massachusetts Shoreline Change Project Theme_Keyword: DSAS Theme_Keyword: Digital Shoreline Analysis System Theme_Keyword: Shoreline Theme_Keyword: Shoreline Change Theme_Keyword: Mean High Water Theme_Keyword: MHW Theme_Keyword: lidar uncertainty Theme_Keyword: Database IV format Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: coastal processes Theme_Keyword: statistical analysis Place: Place_Keyword_Thesaurus: None Place_Keyword: United States Place_Keyword: Atlantic Coast Place_Keyword: New England Place_Keyword: Massachusetts Place_Keyword: Nantucket Access_Constraints: None. Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Emily A. Himmelstoss 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 x2262 Contact_Facsimile_Telephone: 508-547-2310 Contact_Electronic_Mail_Address: ehimmelstoss@usgs.gov Native_Data_Set_Environment: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.0.4.4000 Cross_Reference: Citation_Information: Originator: E.R. Thieler Originator: T.L. Smith Publication_Date: 2013 Title: Massachusetts Shoreline Change Mapping and Analysis Project, 2012 Update Geospatial_Data_Presentation_Form: vector digital data 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: 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 2012 update Geospatial_Data_Presentation_Form: vector digital data 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/ Cross_Reference: Citation_Information: Originator: E. Robert Thieler Originator: James F. O'Connell Originator: Courtney A. Schupp Publication_Date: 2001 Title: The Massachusetts Shoreline Change Project: 1800s to 1994 Technical Report Geospatial_Data_Presentation_Form: vector digital data 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://web.whoi.edu/seagrant/wp-content/uploads/sites/24/2015/01/WHOI-T-01-001-Thieler-E.R.-The-Mass.-Shorel.pdf Online_Linkage: https://www.mass.gov/service-details/massachusetts-shoreline-change-project Cross_Reference: Citation_Information: Originator: Emily A. Himmelstoss Originator: Meredith G. Kratzmann Originator: Cheryl J. Hapke Originator: E. Robert Thieler Originator: Jeffrey List Publication_Date: 20110119 Title: The National Assessment of Shoreline Change: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the New England and Mid-Atlantic Coasts Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2010-1119 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: https://pubs.usgs.gov/of/2010/1119/ Cross_Reference: Citation_Information: Originator: Emily A. Himmelstoss Originator: Amy S. Farris Originator: Rachel E. Henderson Originator: Meredith G. Kratzmann Originator: Ayhan Ergul Originator: Ouya Zhang Originator: Jessica L. Zichichi Publication_Date: 2018 Title: Digital Shoreline Analysis System (version 5.0): U.S. Geological Survey software Series_Information: Series_Name: software release Issue_Identification: version 5.0 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/P91MNNSN Online_Linkage: https://code.usgs.gov/usgs/dsas/ Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The attributes in this table record positional and measurement uncertainties and datum offsets calculated during the process of extracting an operational mean high water shoreline from the lidar data as described in the process steps. The field names are based on the requirements for use within the Digital Shoreline Analysis System (DSAS) software (USGS software release). Logical_Consistency_Report: Each row contains data associated with an individual vertex point along the lidar shoreline in Nantucket_pShoreline_2012.shp and Nantucket_pShoreline_2013.shp. Completeness_Report: The table only contains data where a mean high water shoreline point could be extrapolated from the lidar. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Each MHW shoreline point extracted using the profile method has an uncertainty associated with it. This uncertainty includes three components: 1) the 95% confidence interval on the linear regression estimate of the shoreline position; 2) the uncertainty associated with the elevation of the raw lidar data which is stated as 0.1 m RMS in the lidar metadata; 3) the uncertainty due to extrapolation if the shoreline point was determined by extrapolation. These three components of uncertainty were then added in quadrature, yielding a total error for each shoreline point which is stored in the shoreline uncertainty DBF file associated with these data. The lidar shorelines have an average positional uncertainty of plus or minus 1.34 meters. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM) Originator: Woolpert Publication_Date: 20150615 Title: 2013-2014 U.S. Geological Survey CMGP LiDAR: Post Sandy (MA, NH, RI) Geospatial_Data_Presentation_Form: tabular digital data Publication_Information: Publication_Place: Charleston, SC Publisher: NOAA's Ocean Service, Office for Coastal Management (OCM) Online_Linkage: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=4914 Online_Linkage: https://coast.noaa.gov/htdata/lidar1_z/geoid12b/data/4914 Online_Linkage: https://coast.noaa.gov/dataviewer Online_Linkage: https://coast.noaa.gov/htdata/lidar1_z/geoid12b/data/4914/supplemental/ne2013_2014_usgs_postsandy_m4914.kmz Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20131116 Ending_Date: 20141227 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: 2013-2014 lidar Source_Contribution: The LAS format (lidar data exchange file format) was used. Process_Step: Process_Description: Whenever possible, a profile method was used to extract the operational Mean High Water (MHW) shoreline from the lidar point cloud data, using a Matlab-based approach (Matlab version 2015b) similar to the one developed by Stockdon and others (2002). Elevation values for the height of MHW were determined from vdatum (version 3.8) provided by NOAA (https://vdatum.noaa.gov/). We continued the practice set out by Weber and others, (2005) of using one MHW value for a continuous section of coast (as opposed to using a continuously varying value). We chose this value such that it is always within 15 cm of the value returned by vdatum at any point along the coast. For example, we used MHW = 0.6 m for all of Buzzards Bay even though vdatum shows it varying slightly over the basin. For the eastern shorelines of Nantucket we used an average MHW elevation of 0.39 meters. For the southwest facing shoreline, we used an average MHW elevation of 0.29 meters. This profile method uses a coast-following reference line with 20 m spaced profiles. All lidar data points that are within 1 m of each profile are associated with that profile. All work is done on the 2 m wide profiles, working on a single profile at a time. For each profile, a linear regression was fit through data points on the foreshore and the regression was evaluated at the MHW elevation to yield the cross-shore position of the MHW shoreline. If there was a data gap at MHW or if the MHW elevation was obscured by water points, the linear regression was simply extrapolated to the MHW elevation. Foreshore beach slope is defined as the slope of the regression line. Each MHW shoreline point that was extracted using this profile method has an uncertainty associated with it. This uncertainty includes three components: 1) the 95% confidence interval on the linear regression estimate of the shoreline position; 2) the uncertainty associated with the elevation of the raw lidar data and; 3)the uncertainty due to extrapolation. These three components of uncertainty were added in quadrature to yield a total error for each shoreline point. For details on each component, see pp.12-13 under the section titled Lidar-Derived MHW Shoreline Position Uncertainty in Hapke and others (2011). There is a known horizontal offset between the datum-based lidar MHW shoreline and the proxy-based historical shorelines that nearly always acts in one direction (Ruggiero and List, 2009). Wave data from offshore buoys is used with the beach slope in a run-up equation to estimate a proxy-datum bias correction to reconcile the unidirectional offset that the proxy-based historic High Water Line (HWL) shorelines, such as those derived from NOAA t-sheets or air photos, have in relationship to the lidar-derived, datum-based operational MHW line. An uncertainty associated with the bias was also computed, which can also be thought of as the uncertainty of the HWL shorelines due to water level fluctuations. For details on the proxy-datum bias and bias uncertainty, see pp.9-11 under the section titled The Proxy-Datum Bias Correction between HWL and MHW Shorelines in Hapke and others (2011). Hapke, C.J., Himmelstoss, E.A., Kratzmann, M.G., List, J.H., and Thieler, E.R., 2011, National assessment of shoreline change—Historical shoreline change along the New England and Mid-Atlantic coasts: U.S. Geological Survey Open-File Report 2010-1118, 57 p., https://pubs.usgs.gov/of/2010/1118/. Ruggiero, P., and List, J.H., 2009, Improving accuracy and statistical reliability of shoreline position and change rate estimates: Journal of Coastal Research, v. 25, no. 5, p. 1069-1081. [Also available at https://www.jstor.org/stable/27752753] Stockdon, H.F., Sallenger, A.H., List, J.H., and Holman, R.A., 2002, Estimation of shoreline position and change using airborne topographic lidar data: Journal of Coastal Research, v.18, no. 3, p. 502-513. [Also available at https://www.jstor.org/stable/4299097] Process_Date: 2016 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Amy S. Farris Contact_Organization: U.S. Geological Survey 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 x2344 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: afarris@usgs.gov Process_Step: Process_Description: The series of operational MHW points extracted from the cross-shore lidar profiles were converted to a .dbf file storing the lidar positional uncertainty, for each point of the original lidar data. During the rate calculation process DSAS uses linear referencing to retrieve the uncertainty value stored in the associated table. Process_Date: 2016 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Emily A. Himmelstoss Contact_Organization: U.S. Geological Survey 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 x2262 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: ehimmelstoss@usgs.gov Process_Step: Process_Description: Moved the uncertainty table and the corresponding metadata to a landing page of its own to facilitate the assigning of a persistent identifier to the metadata that is based on the landing page UUID. This reorganization required updating various links in the metadata. The western longitude of the bounding coordinates was also fixed in the metadata. Process_Date: 20200611 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: 20200810 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: Indirect_Spatial_Reference: This dataset contains 1941 records that are related to the associated shoreline datasets by M-values in each polyline-M shapefile that is represented by the ID attribute in this dataset. Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0197422321 Longitude_Resolution: 0.0262000699 Geographic_Coordinate_Units: Decimal seconds Geodetic_Model: Horizontal_Datum_Name: WGS_1984 Ellipsoid_Name: WGS_84 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Nantucket_pShoreline_uncertainty Entity_Type_Definition: uncertainty table Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: OID 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: ID Attribute_Definition: This field is case-sensitive and name specific. The field contains a cross-shore lidar profile ID stored as the M-value (measure value) at each vertex in the calibrated shoreline route. This serves as the link between the lidar shoreline and the uncertainty table and must be a unique number at each point. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 488 Range_Domain_Maximum: 2572 Attribute: Attribute_Label: UNCY Attribute_Definition: This field heading is case-sensitive and name specific. The field contains the plus/minus horizontal uncertainty (meters) in the lidar shoreline position at each cross-shore beach profile. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.69 Range_Domain_Maximum: 32 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: BIAS Attribute_Definition: This field heading is case-sensitive and name specific. The field contains a proxy-datum bias value describing the unidirectional horizontal offset (in meters) between the MHW elevation of the lidar data and proxy-based historic HWL shoreline positions. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 8.9 Range_Domain_Maximum: 9.85 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: UNCYB Attribute_Definition: This field heading is case-sensitive and name specific. The field contains the uncertainty in the calculated proxy-datum bias value (BIAS) in meters. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.787 Range_Domain_Maximum: 4.361 Attribute_Units_of_Measure: meters Overview_Description: Entity_and_Attribute_Overview: The entity and attribute information provided here describes the tabular data associated with the dataset. Please review the individual attribute descriptions for detailed information. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing and physical address Address: MS 302 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: The dataset contains the uncertainty data in DBF format (Nantucket_pShoreline_uncertainty.dbf) and the CSDGM metadata in XML format. Distribution_Liability: Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: DBF Format_Version_Number: dBase IV Format_Information_Content: The dataset contains the uncertainty table, and CSDGM metadata. Transfer_Size: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5ee259fc82ce3bd58d7e13af Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5ee259fc82ce3bd58d7e13af Network_Resource_Name: https://doi.org/10.5066/P9O7S72B Access_Instructions: The first link is to the page containing the data. The second is a direct link to download all data available from the page as a zip file. And the final link is to the publication landing page. Fees: None Technical_Prerequisites: These data are available in dBase file format. The user must have software capable of reading or importing the dBase formatted data file. Metadata_Reference_Information: Metadata_Date: 20200810 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Emily A. Himmelstoss Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing 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 x2262 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: ehimmelstoss@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time