Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 20210831 Title: Historical shoreline positions for the coast of MA, from 1844 - 2014. Edition: 1 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: doi:10.5066/P9O8QA8N 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/P9O8QA8N Online_Linkage: https://www.sciencebase.gov/catalog/item/6102d53ed34ef8d7055e79dc Larger_Work_Citation: Citation_Information: Originator: Marie K. Bartlett Originator: Amy S. Farris Originator: Kathryn M. Weber Originator: Emily A. Himmelstoss Publication_Date: 2021 Title: Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines (1844-2018) Edition: 1 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: doi:10.5066/P9O8QA8N Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Bartlett, M.K., Farris, A.S., Weber, K.M., and Himmelstoss, E.A., 2021, Massachusetts shoreline change project—A GIS compilation of vector shorelines for the 2021 update: U.S. Geological Survey data release, https://doi.org/10.5066/P9O8QA8N Online_Linkage: https://www.sciencebase.gov/catalog/item/60ff09abd34e3ccd830d5dac Online_Linkage: https://doi.org/10.5066/P9O8QA8N Description: Abstract: The Massachusetts Office of Coastal Zone Management (MA CZM) launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast by compiling a database of historical (1800's-1989) shoreline positions and shoreline change maps. Trends of shoreline position over long and short-term timescales provide information to landowners, managers, and potential buyers about possible future impacts to coastal resources and infrastructure. 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. The 2013 update also included a 2000 lidar shoreline covering most of the open-ocean coast, as well as a 2001 shoreline for the South Shore coastal region. In 2018, two new mean high water (MHW) shorelines for the Massachusetts coast extracted from lidar data collected between 2010-2014 were added to the dataset. This 2021 data release contains a compilation of previously published historical shoreline positions spanning 170 years (1844 to 2014), intended to be used as an authoritative shoreline database for the state. This dataset is an update to the Massachusetts Office of Coastal Zone Management Shoreline Change Project. Purpose: Shoreline positions serve as easily understood features that can be used to describe the movement of beaches through time. This dataset includes shorelines from 170 years ranging from 1844 to 2014 for the coastal region of Massachusetts. Historical shorelines were compiled from a variety of methods including T-sheets, orthophotos, and lidar data. These data are used to calculate rates of shoreline change for the MA CZM Shoreline Change Project. Rates of long-term and short-term shoreline change were generated in a GIS using the Digital Shoreline Analysis System (DSAS) version 5.1. DSAS uses a measurement baseline method to calculate rate-of-change statistics. Transects are cast from the reference baseline to intersect each shoreline, establishing measurement points used to calculate shoreline change rates. Supplemental_Information: Cross-referenced citations are applicable to the entire dataset. Additional citations are located within individual process steps that pertain specifically to the method described in that step. The shoreline database contains both MHW and high-water line (HWL) shorelines, which can lead to incorrect estimates of rates of change since visually identified HWL-type proxy shorelines are virtually never coincident with datum-based MHW-type shorelines. For open-ocean sandy beaches, historical, proxy-based HWL shorelines tend to be landward of datum-based MHW shorelines. A proxy-datum bias (PDB) describes this unidirectional horizontal offset that occurs between the MHW shoreline and the HWL shoreline, and is stored as a line feature class appended to the reference baseline, with an attribute for the bias value as well as the bias uncertainty. The PDB is used in conjunction with the shoreline files to calculate rates of shoreline change. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1844 Ending_Date: 2014 Currentness_Reference: ground condition of the data these shorelines are based on Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -71.1231 East_Bounding_Coordinate: -69.9258 North_Bounding_Coordinate: 42.8943 South_Bounding_Coordinate: 41.2374 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: oceans Theme_Keyword: environment 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: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: coastal processes Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:6102d53ed34ef8d7055e79dc Place: Place_Keyword_Thesaurus: None Place_Keyword: United States Place_Keyword: Atlantic Coast Place_Keyword: New England Place_Keyword: Massachusetts Place_Keyword: North Shore Place_Keyword: South Shore Place_Keyword: Cape Cod Bay Place_Keyword: Outer Cape Place_Keyword: South Cape Place_Keyword: Nantucket Place_Keyword: Martha’s Vineyard Place_Keyword: Buzzard’s Bay 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: Marie K. Bartlett 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: mbartlett@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/6102d53ed34ef8d7055e79dc?name=MA_historical_shorelines_browse.PNG Browse_Graphic_File_Description: Map view of data Browse_Graphic_File_Type: PNG Native_Data_Set_Environment: Microsoft Windows 10 Version 6.2 (Build 1909) Esri ArcGIS 10.7.1.11595 Cross_Reference: Citation_Information: Originator: Kathryn M. Weber Originator: Jeffrey H. List Originator: Karen L.M. Morgan Publication_Date: 2005 Title: An operational mean high water datum for determination of shoreline position from topographic lidar data Geospatial_Data_Presentation_Form: Open-File Report Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1027 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://pubs.usgs.gov/of/2005/1027/ 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 Geospatial_Data_Presentation_Form: Software release 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/10.5066/P91MNNSN Online_Linkage: https://code.usgs.gov/cch/dsas Cross_Reference: Citation_Information: Originator: Peter Ruggiero Originator: Jeffrey H. List Publication_Date: 200909 Title: Improving Accuracy and Statistical Reliability of Shoreline Position and Change Rate Estimates Geospatial_Data_Presentation_Form: publication Series_Information: Series_Name: Journal of Coastal Research Issue_Identification: vol. 255 Publication_Information: Publication_Place: n/a Publisher: Coastal Education and Research Foundation Other_Citation_Details: ppg. 1069-1081 Online_Linkage: https://doi.org/10.2112/08-1051.1 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The data provided here are a compilation of shorelines from multiple sources, spanning 170 years. The attributes are based on the requirements of the Digital Shoreline Analysis System (DSAS) software and have gone through a series of quality assurance procedures. Logical_Consistency_Report: Adjacent shoreline segments do not overlap and are not necessarily continuous. Shorelines were quality checked for accuracy. Any slight offsets between adjacent segments due to georeferencing and digitizing error are considered in the uncertainty calculations included in the attribute table. These data contain some short line segments (less than 30 meters) that were part of how the data were originally compiled and are in fact continuous with other segments of a given shoreline. Completeness_Report: This shoreline file is complete and contains all historical shoreline segments used to calculate shoreline change rates along sections of the Massachusetts 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, if applicable, are a consequence of non-existing data or existing data that did not meet quality assurance standards. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Shoreline data have been acquired from 1844 to 2014, the horizontal accuracy of which varies with respect to data source from which the shorelines were digitized and the time period. Shorelines prior to 1938 have an estimated positional uncertainty of plus or minus 11.6 meters. Air photo-derived shorelines from 1969-1994 have an estimated positional uncertainty of plus or minus 6.7 meters. Shorelines derived from 15cm 2008 orthophotos have an estimated positional uncertainty of plus or minus 4.4 meters. Shorelines derived from 30cm 2008 orthophotos have an estimated positional uncertainty of plus or minus 4.9 meters. Positional uncertainty associated with shorelines extracted from lidar data (2000, 2010-2014) was calculated at each transect and 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. The uncertainty for each lidar survey is the spatial average over all transects in each region. Along with the uncertainty associated with shorelines extracted using this method, there is also a horizontal offset between the datum-based lidar MHW shorelines and the proxy-based historical shorelines such as those derived from NOAA T-sheets and aerial photos. This offset nearly always acts in one direction and these uncertainties and offsets are accounted for in the associated data release containing shoreline changes rates and a proxy-datum bias feature. Lineage: Source_Information: Source_Citation: 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 Edition: 1 Geospatial_Data_Presentation_Form: Administrative Report 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://seagrant.whoi.edu/wp-content/uploads/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 Type_of_Source_Media: vector digital data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1880 Ending_Date: 1993 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: MA Historical Shorelines 1 Source_Contribution: Historical shorelines were imported to combine with other shorelines for the new historical shoreline database for MA. Source_Information: Source_Citation: 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 Online_Linkage: https://pubs.usgs.gov/of/2010/1119/ Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1850 Ending_Date: 2000 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: MA historical shorelines 2 Source_Contribution: Historical shorelines were imported to combine with other shorelines for the new historical shoreline database for MA. Source_Information: Source_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 Geospatial_Data_Presentation_Form: Open-File Report 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/ Type_of_Source_Media: Digital and/or Hardcopy Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1845 Ending_Date: 2009 Source_Currentness_Reference: ground condition at the time of data collection Source_Citation_Abbreviation: MA historical shorelines 3 Source_Contribution: Historical shorelines were imported to combine with other shorelines for the new historical shoreline database for MA. Source_Information: Source_Citation: Citation_Information: Originator: Emily A. Himmelstoss Originator: Amy S. Farris Originator: Kathryn M. Weber Publication_Date: 20181126 Title: Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines for the 2018 update Geospatial_Data_Presentation_Form: dataset Publication_Information: Publication_Place: https://www.sciencebase.gov Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/p9o7s72b Source_Scale_Denominator: 5000 Type_of_Source_Media: Digital and/or Hardcopy Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2010 Ending_Date: 2014 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: MA historical shorelines 4 Source_Contribution: Shorelines published for 2010-2014 were imported into the new historical shoreline database for MA. Process_Step: Process_Description: Shoreline data were sought in an effort to compile as many quality shorelines as possible for the region. Historic shoreline positions (1844-2014) were compiled and projected to the same coordinate system using Esri's ArcToolbox (v.10.7.1)> Data Management Tools > Projections and Transformations > Feature > Project. Parameters: input projection = Geographic Coordinate System (NAD_1983); output projection = WGS 1984 UTM 19N ; transformation = NAD_1983_To_WGS_1984_1. Shorelines were imported into a personal geodatabase in ArcMap v10.7.1 by right-clicking on the geodatabase > Import > feature class (multiple). This process step and all subsequent process steps were performed by the same person: Marie K. Bartlett Source_Used_Citation_Abbreviation: MA historical shorelines 1 Source_Used_Citation_Abbreviation: MA historical shorelines 2 Source_Used_Citation_Abbreviation: MA historical shorelines 3 Source_Used_Citation_Abbreviation: MA historical shorelines 4 Process_Date: 2020 Source_Produced_Citation_Abbreviation: MA Historical Shoreline Database Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Marie K. Bartlett Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical Address: 384 Woods Hole Rd City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x2306 Contact_Facsimile_Telephone: 508-547-2310 Contact_Electronic_Mail_Address: mbartlett@usgs.gov Process_Step: Process_Description: A rigorous QA/QC analysis was performed on all existing shorelines in the database. Some sections of historical shorelines (1845-1862, 1962-1963) that were not accurately representing the past shoreline positions were eliminated from the appended dataset in ArcMap v10.7.1 by selecting the segment and deleting. Shoreline features were checked for overlapping data and segmentation of adjacent shoreline segments with coincident vertices. Shoreline segments of the same calendar date and year were merged to form a single polyline feature by selecting all continuos shoreline segments within an ArcMap Edit session > Start Editing < Merge. Non-adjacent, compounded shoreline segments were broken back into individual features using Advanced Editing > Explode Multipart Feature in ArcMap v10.7.1. Source_Used_Citation_Abbreviation: MA Historical Shoreline Database Process_Date: 2020 Source_Produced_Citation_Abbreviation: MA Historical Shorelines QAQC Process_Step: Process_Description: After all shorelines were edited in a personal geodatabase and used to compute shoreline change rates, the shoreline feature class was exported from the personal geodatabase back to a shapefile in ArcMap v.10.7.1 by right-clicking on the shoreline file > Export > To Shapefile (single). Source_Used_Citation_Abbreviation: MA Historical Shorelines QAQC Process_Date: 2021 Source_Produced_Citation_Abbreviation: MA Historical Shorelines shapefile Process_Step: Process_Description: The exported shoreline shapefiles were projected in Esri's ArcToolbox (v7.1) > Data Management Tools > Projections and Transformations > Project. Input projection = UTM zone 19N (WGS84); output projection = geographic coordinates (WGS84); transformation = none. Source_Used_Citation_Abbreviation: MA Historical Shorelines shapefile Process_Date: 2021 Source_Produced_Citation_Abbreviation: MA Historical Shorelines 1844 - 2014 Process_Step: Process_Description: Tweaked a thesaurus name (20211117). Process_Date: 20211117 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: String Point_and_Vector_Object_Count: 5402 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0197393747 Longitude_Resolution: 0.0264611291 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: MA_Historical_Shorelines_all.shp Entity_Type_Definition: This dataset includes polyline shorelines from 170 years ranging from 1844 to 2014 for the coastal region of Massachusetts. Entity_Type_Definition_Source: Producer Defined 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. These shorelines are polyline shapefiles. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: Contour Attribute_Definition: The height of MHW was determined from vdatum provided by NOAA. (https://vdatum.noaa.gov/). One MHW value was used for a continuous section of coast (as opposed to using a continuously varying value). This contour attribute value is reported in meters and is always within 15 cm of the value returned by vdatum at any point along the coast. This dataset combines two methods of shoreline extraction, profile and contour. A value of zero in this field indicates the profile method of extraction was used. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.2 Range_Domain_Maximum: 1.44 Attribute: Attribute_Label: Date_ Attribute_Definition: Date of shoreline position; date of survey as indicated on source material in month/day/year (mm/dd/yyyy) format. A default date of 07/01 was assigned to shorelines where only the year was known (month and day unknown). Using July, the mid-point month of the calendar year, minimizes the potential offset to the actual shoreline date by a maximum of six months. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Character string of length 10 Attribute: Attribute_Label: Uncy Attribute_Definition: Estimate of shoreline position uncertainty in meters. Actual shoreline position is within the range of this value (plus or minus, meters). Methods used to calculate the uncertainty are listed in the process steps. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 11.6 Attribute: Attribute_Label: Source Attribute_Definition: Agency that provided shoreline feature or the data source used (e.g. T-sheet) to digitize shoreline feature. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Character string of length 25 Attribute: Attribute_Label: Source_b Attribute_Definition: Method of deriving shoreline feature, if known. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Character string of length 25 Attribute: Attribute_Label: Default_D Attribute_Definition: Differentiates between shorelines that have known month and day attributes and those that use the default value of 07/01 when only the year is known. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: Shoreline month and day are known. Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Shoreline month and day are unknown and default value of 07/01 was used. Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: Region Attribute_Definition: Subregion of Massachusetts coast where shoreline data are located. Other shoreline files extracted from different methods required that the data be split into regions and this field correlates to those extents. Shoreline change rates were calculated by region and in some cases, regions were further split into “sheltered”, “exposed”, “or headland” to accommodate baseline orientation requirements. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Character string of length 25 Attribute: Attribute_Label: Year_ Attribute_Definition: Four-digit year of shoreline Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1844 Range_Domain_Maximum: 2014 Attribute: Attribute_Label: Type Attribute_Definition: The vertical shoreline reference. Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: MHW Enumerated_Domain_Value_Definition: mean high water - a datum-based reference Enumerated_Domain_Value_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: HWL Enumerated_Domain_Value_Definition: High water line - a proxy-based historical shoreline Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: Shape_Leng Attribute_Definition: Length of feature/transect in meter units (WGS 1984 UTM Zone 19N) Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing and physical address Address: Federal Center, Building 810, 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 polyline shapefiles of shoreline data derived from a profile or contour method, (MA_historical_shorelines.shp and other shapefile components), browse graphic (MA_historical_shorelines_browse), and the FGDC 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: Shapefile Format_Version_Number: ArcGIS 10.7 Format_Specification: Esri polyline shapefile Format_Information_Content: Dataset contains the shapefile, browse graphic, and CSDGM metadata. Transfer_Size: 11 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/6102d53ed34ef8d7055e79dc Network_Resource_Name: https://www.sciencebase.gov/catalog/item/6102d53ed34ef8d7055e79dc Network_Resource_Name: https://doi.org/10.5066/P9O8QA8N Access_Instructions: The first link downloads all the files on the dataset landing page. The second link is to the dataset landing page where individual files can be viewed and downloaded. The third link is to the data release main landing page. Fees: None Technical_Prerequisites: These data are available in a polyline shapefile format. The user must have software to read and process the data components of a shapefile. Metadata_Reference_Information: Metadata_Date: 20211117 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Marie K. Bartlett 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 X2306 Contact_Electronic_Mail_Address: mbartlett@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time