Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 20210831 Title: Intersects for coastal region of Nantucket, Massachusetts, generated to calculate shoreline change rates using the Digital Shoreline Analysis System version 5.1 Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: doi:10.5066/P9YGIYFX 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/P9YGIYFX Online_Linkage: https://www.sciencebase.gov/catalog/item/6108308dd34ef8d70565bd53 Larger_Work_Citation: Citation_Information: Originator: Marie K. Bartlett Originator: Rachel E. Henderson Originator: Amy S. Farris Originator: Emily A. Himmelstoss Publication_Date: 2021 Title: Massachusetts Shoreline Change Project, 2021 Update: A GIS Compilation of Shoreline Change Rates Calculated Using Digital Shoreline Analysis System Version 5.1, With Supplementary Intersects and Baselines for Massachusetts Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: doi:10.5066/P9YGIYFX Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: suggested citation: Bartlett, M.K., Henderson, R. E., Farris, A.S., and Himmelstoss, E.A., 2021, Massachusetts shoreline change project, 2021 update–A GIS compilation of shoreline change rates calculated using Digital Shoreline Analysis System version 5.1, with supplementary intersects and baselines for Massachusetts: U.S. Geological Survey data release. https://doi.org/10.5066/P9YGIYFX Online_Linkage: https://www.sciencebase.gov/catalog/item/60ff22dad34e3ccd830d62aa Online_Linkage: https://doi.org/10.5066/P9YGIYFX Description: Abstract: The Massachusetts Office of Coastal Zone Management launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast and support local land-use decisions. 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 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. In 2018, two new mean high water (MHW) shorelines for the Massachusetts coast extracted from lidar data between 2010-2014 were added to the dataset. This 2021 data release includes rates that incorporate one new shoreline from lidar data extracted in 2018 by the U.S. Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX), added to the existing database of all historical shorelines (1844-2014), for the North Shore, South Shore, Cape Cod Bay, Outer Cape, Buzzard’s Bay, South Cape, Nantucket, and Martha’s Vineyard. 2018 lidar data did not cover the Boston or Elizabeth Islands regions. Included in this data release is a proxy-datum bias reference line that accounts for the positional difference in a proxy shoreline (the high water Line shoreline) and a datum shoreline (the mean high water shoreline. This issue is explained further in Ruggiero and List (2009) and in the process steps of the metadata associated with the rates. This release includes both long-term (~150+ years) and short term (~30 years) rates. Files associated with the long-term rates have “LT” in their names, files associated with short-term rates have "ST” in their names. Purpose: This dataset consists of point data which are created by the Digital Shoreline Analysis System (DSAS) version v5.1 at the intersection of shoreline and transect locations. Rate calculations were computed within a GIS using the Digital Shoreline Analysis System (DSAS) version 5.1, an ArcGIS extension developed by the U.S. Geological Survey. Measurement transects are cast by DSAS from the baseline to intersect shoreline vectors, and the intersect data provide location and time information used to calculate rates of change. These point data contain identification information related to the DSAS transect (TransectID, TransOrder) as well as the shoreline (ShorelineID, Uncertainty) and proxy-datum bias data (if applicable). Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2021 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.3193 East_Bounding_Coordinate: -69.9592 North_Bounding_Coordinate: 41.3873 South_Bounding_Coordinate: 41.2374 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: environment Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Intersects Theme_Keyword: Shoreline Theme_Keyword: Shoreline Change 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: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geospatial datasets Theme_Keyword: coastal processes Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:6108308dd34ef8d70565bd53 Place: Place_Keyword_Thesaurus: None Place_Keyword: Atlantic Coast Place_Keyword: United States Place_Keyword: North America Place_Keyword: Massachusetts Place_Keyword: Nantucket Access_Constraints: None. Use_Constraints: These data were automatically generated using the DSAS v5.1 software application. 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. These data are not to be used for navigation. 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: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 x 2306 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: mbartlett@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/6108308dd34ef8d70565bd53?name=Nantucket_intersects_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: 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 Edition: 1 Geospatial_Data_Presentation_Form: publication 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://code.usgs.gov/cch/dsas/ Online_Linkage: https://doi.org/10.5066/P9VW42I0 Online_Linkage: https://woodshole.er.usgs.gov/project-pages/DSAS/ Cross_Reference: Citation_Information: Originator: Emily A. Himmelstoss Originator: Rachel E. Henderson Originator: Meredith G. Kratzmann Originator: Amy S. Farris Publication_Date: 2018 Title: DSAS v5.0 user guide Geospatial_Data_Presentation_Form: publication Series_Information: Series_Name: Open-File Report Issue_Identification: 2018-1179 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Himmelstoss, E.A., Henderson, R.E., Kratzmann, M, Farris, A., 2018, DSAS version 5.0 user guide. U.S. Geological Survey report 2018-1179, https://doi.org/10.3133/ofr20181179 Online_Linkage: https://doi.org/10.3133/ofr20181179 Online_Linkage: https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas Cross_Reference: 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: DOI:10.5066/P9O7S72B Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9O7S72B Publication_Information: Publication_Place: Reston, VA 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/5bcde5dce4b0f0758fc178d0 Online_Linkage: https://www.sciencebase.gov/catalog/file/get/5bcde5dce4b0f0758fc178d0 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 Cross_Reference: Citation_Information: Originator: Emily A. Himmelstoss Originator: Amy S. Farris Originator: Kathryn M. Weber Publication_Date: 2019 Title: Massachusetts Shoreline Change Project, 2018 Update: A GIS Compilation of Shoreline Change Rates Calculated Using Digital Shoreline Analysis System Version 5.0, With Supplementary Intersects and Baselines for Massachusetts Edition: 1 Geospatial_Data_Presentation_Form: publication Series_Information: Series_Name: Data release Issue_Identification: DOI:10.5066/P9RRBEYK Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9RRBEYK Online_Linkage: https://www.sciencebase.gov/catalog/item/5be5857ce4b0b3fc5cf8c6ca 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 intersects layer. Logical_Consistency_Report: These data were generated using DSAS, an automated software program, which does not perform checks for fidelity of the input features. Following generation of the rates and intersects by the DSAS software a visual inspection of the intersects was performed in map view to determine that no unwanted measurements were included in the desired (long- or short-term) shoreline change analysis. Completeness_Report: This dataset contains all the shoreline/transect intersects used to compute rates in the DSAS v5.1 software application. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The intersection points represent the location where transects cast by the Digital Shoreline Analysis System (DSAS) software crosses a historical shoreline position. They can be used to visually display which shorelines were used in the rate calculations and capture details on the shoreline represented by the intersection. The distances between the reference baseline and each shoreline intersection along a transect are used by the DSAS software to compute the shoreline change metrics. The positional uncertainties associated with the shoreline and intersection points are captured in the shoreline attribute table. Lineage: Source_Information: Source_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., and Weber, K.M., Himmelstoss, E.A., 2021, Massachusetts shoreline change project—A GIS compilation of vector shorelines (1844-2018): U.S. Geological Survey data release Online_Linkage: https://doi.org/10.5066/P9O8QA8N Type_of_Source_Media: vector digital data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1844 Ending_Date: 2018 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: MA 1844 - 2018 Shorelines Source_Contribution: Shorelines published as part of the Massachusetts Shoreline Change Project, 2021 Update were compiled for shoreline change analysis with DSAS v5.1 Source_Information: Source_Citation: Citation_Information: Originator: Marie K. Bartlett Originator: Rachel E. Henderson Originator: Amy S. Farris Originator: Emily A. Himmelstoss Publication_Date: 2021 Title: Baseline for the northern coast of Nantucket, Massachusetts, generated to calculate shoreline change rates using the Digital Shoreline Analysis System version 5.1 Edition: 1 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release product Issue_Identification: doi:10.5066/P9YGIYFX Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9YGIYFX Type_of_Source_Media: vector digital data Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2021 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: NantucketN_baseline Source_Contribution: Baseline files for region published as part of the Massachusetts Shoreline Change Project, 2021 Update used for shoreline change analysis with DSAS v5.1 Source_Information: Source_Citation: Citation_Information: Originator: Marie K. Bartlett Originator: Rachel E. Henderson Originator: Amy S. Farris Originator: Emily A. Himmelstoss Publication_Date: 2021 Title: Baseline for the southern coast of Nantucket, Massachusetts, generated to calculate shoreline change rates using the Digital Shoreline Analysis System version 5.1 Edition: 1 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release product Issue_Identification: doi:10.5066/P9YGIYFX Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9YGIYFX Type_of_Source_Media: vector digital data Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2021 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: NantucketS_baseline Source_Contribution: Baseline files for region published as part of the Massachusetts Shoreline Change Project, 2021 Update used for shoreline change analysis with DSAS v5.1 Process_Step: Process_Description: Explanation of the methods used to calculate shoreline change rates as part of the 2021 update for the Massachusetts Office of Coastal Zone Management Shoreline Change Project: This data release consists of intersect point shapefiles that hold the data necessary to calculate long- and short-term rates of shoreline change. Depending on the available data, the shorelines used for analysis may include those referenced to mean high water (MHW) or a proxy-based high water line (HWL).Transects with both MHW and HWL shorelines will have the proxy-datum bias applied. Shoreline data from the 2021 data release (historical and 2018), were merged into a single feature class (MA_shorelines_LT) for the long-term shoreline change. For this completed shoreline compilation, shoreline data were extracted for the last 30 years and merged into a feature class (MA_shorelines_ST) to calculate short-term shoreline change. All files were projected to UTM zone 19N coordinates and confirmed to have the same attribute names needed for use in DSAS. Note the range of shoreline dates will vary by location. Please check the intersect file attributes for a record of the exact dates used. This process step and all subsequent process steps were performed by the same person: Marie K. Bartlett Source_Used_Citation_Abbreviation: MA 1844 - 2018 Shorelines Process_Date: 2020 Source_Produced_Citation_Abbreviation: MA_shorelines_LT Source_Produced_Citation_Abbreviation: MA_shorelines_ST 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 Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: USA Contact_Voice_Telephone: 508-548-8700 x2306 Contact_Electronic_Mail_Address: mbartlett@usgs.gov Process_Step: Process_Description: Transect features generated in a personal geodatabase using DSAS v5.1.2020.0720.0030. Parameters Used: baseline layer= NantucketN_baseline, baseline group field=DSAS_group, transect spacing=50 meters, search distance=200 meters, land direction=right, shoreline intersection=seaward, File produced = NantucketN_trans_LT. For additional details on these parameters, please see the DSAS help file distributed with the DSAS software, or visit the USGS website at: https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas. Some transects were manually edited for length, moved, or deleted in an edit session using standard editing tools in ArcMap v10.7.1 Source_Used_Citation_Abbreviation: MA_shorelines_LT Source_Used_Citation_Abbreviation: NantucketN_baseline Process_Date: 2020 Source_Produced_Citation_Abbreviation: NantucketN_transects_LT Process_Step: Process_Description: Shoreline intersects and rate calculations performed for long-term rates with and without bias. Parameters Used: shoreline layer= MA_shorelines_LT, shoreline date field=Date_, shoreline uncertainty field name=Uncy, the default accuracy=10 meters, shoreline intersection=seaward, stats calculations=[SCE, NSM, LRR], shoreline threshold=3, confidence interval=90%. Files produced = NantucketN_trans_LT_rates_20210621_153805, NantucketN_trans_LT_intersect_20210621_153805. NOTE: All shorelines have an uncertainty value listed in the attribute table that provides the horizontal uncertainty associated with the shoreline, regardless of the method used. The shoreline database contains both MHW and HWL shorelines. Therefore, a proxy-datum bias (PDB), stored as a line feature class appended to the reference baseline, is applied during rate calculation. For more information about the origin of the proxy-datum bias, see Ruggiero and List (2009). Rate statistics are presented with both the PDB applied, and with the bias omitted, in which case the attribute field will show “NB_” or “No bias”. The bias uncertainty values are stored within the bias feature attribute table. Source_Used_Citation_Abbreviation: MA_shorelines_LT Source_Used_Citation_Abbreviation: NantucketN_transects_LT Process_Date: 2021 Source_Produced_Citation_Abbreviation: NantucketN_trans_rates_LT Source_Produced_Citation_Abbreviation: NantucketN_intersects_LT Process_Step: Process_Description: Transect features generated in a personal geodatabase using DSAS v5.1.2020.0720.0030. Parameters Used: baseline layer= NantucketN_baseline, baseline group field=DSAS_group, transect spacing=50 meters, search distance=200 meters, land direction=right, shoreline intersection=seaward, File produced = NantucketN_trans_ST. For additional details on these parameters, please see the DSAS help file distributed with the DSAS software, or visit the USGS website at: https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas Some transects were manually edited for length, moved, or deleted in an edit session using standard editing tools in ArcMap v10.7.1. Source_Used_Citation_Abbreviation: MA_shorelines_ST Source_Used_Citation_Abbreviation: NantucketN_baseline Process_Date: 2021 Source_Produced_Citation_Abbreviation: NantucketN_transects_ST Process_Step: Process_Description: Shoreline intersects and rate calculations performed for long-term rates with and without bias. Parameters Used: shoreline layer= MA_shorelines_ST, shoreline date field=Date_, shoreline uncertainty field name=Uncy, the default accuracy=5.1 meters, shoreline intersection=seaward, stats calculations=[SCE, NSM, EPR LRR], shoreline threshold=2, confidence interval=90%. Files produced = NantucketN_trans_ST_rates_20210621_163023, NantucketN_trans_ST_intersect_20210621_163023. NOTE: All shorelines have an uncertainty value listed in the attribute table that provides the horizontal uncertainty associated with the shoreline, regardless of the method used. The shoreline database contains both MHW and HWL shorelines thus a proxy-datum bias (PDB), stored as a line feature class appended to the reference baseline, is applied during rate calculation. For more information about the origin of the proxy-datum bias, see Ruggiero and List (2009). Rate statistics are presented with both the PDB applied, and with the bias omitted, in which case the attribute field will show “NB_” or “No bias”. The bias uncertainty values are stored within the bias feature attribute table. Source_Used_Citation_Abbreviation: MA_shorelines_ST Source_Used_Citation_Abbreviation: NantucketN_transects_ST Process_Date: 2021 Source_Produced_Citation_Abbreviation: NantucketN_trans_rates_ST Source_Produced_Citation_Abbreviation: NantucketN_intersects_ST Process_Step: Process_Description: Transect features generated in a personal geodatabase using DSAS v5.1.2020.0720.0030. Parameters Used: baseline layer= NantucketS_baseline, baseline group field=DSAS_group, transect spacing=50 meters, search distance=200 meters, land direction=left, shoreline intersection=seaward, File produced = NantucketS_trans_LT. For additional details on these parameters, please see the DSAS help file distributed with the DSAS software, or visit the USGS website at: https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas Some transects were manually edited for length, moved, or deleted in an edit session using standard editing tools in ArcMap v10.7.1. Source_Used_Citation_Abbreviation: MA_shorelines_ST Source_Used_Citation_Abbreviation: NantucketS_baseline Process_Date: 2021 Source_Produced_Citation_Abbreviation: NantucketS_transects_LT Process_Step: Process_Description: Shoreline intersects and rate calculations performed for long-term rates with and without bias. Parameters Used: shoreline layer= MA_shorelines_LT, shoreline date field=Date_, shoreline uncertainty field name=Uncy, the default accuracy=10 meters, shoreline intersection=seaward, stats calculations=[SCE, NSM, LRR], shoreline threshold=3, confidence interval=90%. Files produced = NantucketS_trans_LT_rates_20210706_144229, NantucketS_LT_intersect_20210706_144229. NOTE: All shorelines have an uncertainty value listed in the attribute table that provides the horizontal uncertainty associated with the shoreline, regardless of the method used. The shoreline database contains both MHW and HWL shorelines thus a proxy-datum bias (PDB), stored as a line feature class appended to the reference baseline, is applied during rate calculation. For more information about the origin of the proxy-datum bias, see Ruggiero and List (2009). Rate statistics are presented with both the PDB applied, and with the bias omitted, in which case the attribute field will show “NB_” or “No bias”. The bias uncertainty values are stored within the bias feature attribute table. Source_Used_Citation_Abbreviation: MA_shorelines_LT Source_Used_Citation_Abbreviation: NantucketS_transects_LT Process_Date: 2021 Source_Produced_Citation_Abbreviation: NantucketS_trans_rates_LT Source_Produced_Citation_Abbreviation: NantucketS_intersects_LT Process_Step: Process_Description: Transect features generated in a personal geodatabase using DSAS v5.1.2020.0720.0030. Parameters Used: baseline layer= NantucketS_baseline, baseline group field=DSAS_group, transect spacing=50 meters, search distance=200 meters, land direction=left, shoreline intersection=seaward, File produced = NantucketS_trans_ST. For additional details on these parameters, please see the DSAS help file distributed with the DSAS software, or visit the USGS website at: https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas Some transects were manually edited for length, moved, or deleted in an edit session using standard editing tools in ArcMap v10.7.1. Source_Used_Citation_Abbreviation: MA_shorelines_ST Source_Used_Citation_Abbreviation: NantucketS_baseline Process_Date: 2021 Source_Produced_Citation_Abbreviation: NantucketS_transects_ST Process_Step: Process_Description: Shoreline intersects and rate calculations performed for long-term rates with and without bias. Parameters Used: shoreline layer= MA_shorelines_ST, shoreline date field=Date_, shoreline uncertainty field name=Uncy, the default accuracy=5.1 meters, shoreline intersection=seaward, stats calculations=[SCE, NSM, EPR LRR], shoreline threshold=2, confidence interval=90%. Files produced = NantucketS_trans_ST_rates_20210308_121152, NantucketS_trans_ST_intersect_20210308_121152. NOTE: All shorelines have an uncertainty value listed in the attribute table that provides the horizontal uncertainty associated with the shoreline, regardless of the method used. The shoreline database contains both MHW and HWL shorelines thus a proxy-datum bias (PDB), stored as a line feature class appended to the reference baseline, is applied during rate calculation. For more information about the origin of the proxy-datum bias, see Ruggiero and List (2009). Rate statistics are presented with both the PDB applied, and with the bias omitted, in which case the attribute field will show “NB_” or “No bias”. The bias uncertainty values are stored within the bias feature attribute table. Source_Used_Citation_Abbreviation: MA_shorelines_ST Source_Used_Citation_Abbreviation: NantucketS_transects_ST Process_Date: 2021 Source_Produced_Citation_Abbreviation: NantucketS_trans_rates_ST Source_Produced_Citation_Abbreviation: NantucketS_intersects_ST Process_Step: Process_Description: The intersect feature classes were exported to shapefiles in ArcMap v10.7.1 by right-clicking the transect layer > Data > Export data. Process_Date: 2021 Process_Step: Process_Description: The exported intersect shapefiles were projected in Esri's ArcToolbox (v10.7.1) > Data Management Tools > Projections and Transformations > Project. Parameters: input projection = UTM zone 19N (WGS84); output projection = geographic coordinates (WGS84); transformation = none. Source_Used_Citation_Abbreviation: NantucketN_intersects_LT Source_Used_Citation_Abbreviation: NantucketN_intersects_ST Source_Used_Citation_Abbreviation: NantucketS_intersects_LT Source_Used_Citation_Abbreviation: NantucketS_intersects_ST Process_Date: 2021 Source_Produced_Citation_Abbreviation: NantucketN_intersects_LT Source_Produced_Citation_Abbreviation: NantucketN_intersects_ST Source_Produced_Citation_Abbreviation: NantucketS_intersects_LT Source_Produced_Citation_Abbreviation: NantucketS_intersects_ST Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0197425946 Longitude_Resolution: 0.0261674174 Geographic_Coordinate_Units: Decimal seconds Geodetic_Model: Horizontal_Datum_Name: WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: NantucketN_intersects_LT.shp Entity_Type_Definition: The intersection points are generated by DSAS where each DSAS generated transect crosses a shoreline. These intersections represent the shoreline position, and contain the data necessary for DSAS to compute long-term rates, with and without the proxy-datum bias. Point Object Count: 8624 Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number used as a unique identifier of an object within a table primarily used in shapefiles. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: The geometry field (shape) is automatically created and maintained by ArcGIS. It provides a definition of the feature type (point, line, polygon). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: TransectID Attribute_Definition: The TransectID relates directly to the original transect file Object Identifier, ObjectID or OID Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: unlimited 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: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: BaselineID Attribute_Definition: Values in this field correlate to the baseline attribute field ID and are assigned by DSAS to identify the baseline segment used to generate the measurement transect. Baseline segments assigned an ID = 0 are ignored by DSAS and no transects will be cast along those line segments. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: ShorelineI Attribute_Definition: Date of shoreline position; date of survey as determined from shoreline layer. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Date of the shoreline in mm/dd/yyyy Attribute: Attribute_Label: Distance Attribute_Definition: The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Decimal values may be positive or negative, which is used to indicate landward (negative) or seaward (positive) direction from baseline origin. Attribute: Attribute_Label: IntersectX Attribute_Definition: The X-coordinate location in eastings of the intersect point in WGS84 UTM19N. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 389613.315173 Range_Domain_Maximum: 416575.523026 Attribute: Attribute_Label: IntersectY Attribute_Definition: The Y-coordinate location in northings of the intersect point in WGS84 UTM19N. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4569871.586360 Range_Domain_Maximum: 4582287.530220 Attribute: Attribute_Label: Uncertaint Attribute_Definition: The uncertainty of the shoreline intersect point as defined by the positional-uncertainty value (DSAS_uncy) of the shoreline (ShorelineID). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: Bias_Dista Attribute_Definition: The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect with the proxy-datum bias applied. May be positive or negative depending on the orientation of the baseline. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -366.767791 Range_Domain_Maximum: 770.797716 Attribute: Attribute_Label: BIAS Attribute_Definition: The estimated unidirectional horizontal offset between the MHW elevation of the lidar data and the HWL shoreline position. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: BIAS_X Attribute_Definition: The X-coordinate location of the intersect point with the bias applied. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 389613.314204 Range_Domain_Maximum: 416575.522026 Attribute: Attribute_Label: BIAS_Y Attribute_Definition: The Y-coordinate location of the intersect point with the bias applied. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4569871.587320 Range_Domain_Maximum: 4582287.529650 Attribute: Attribute_Label: Bias_Uncer Attribute_Definition: This is an estimate of the uncertainty of the bias corrected shoreline. It is the shoreline uncertainty and the bias uncertainty added in quadrature Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Detailed_Description: Entity_Type: Entity_Type_Label: NantucketN_intersects_ST.shp Entity_Type_Definition: The intersection points are generated by DSAS where each DSAS generated transect crosses a shoreline. These intersections represent the shoreline position, and contain the data necessary for DSAS to compute short-term rates, with and without the proxy-datum bias. Point Object Count: 5253 Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number used as a unique identifier of an object within a table primarily used in shapefiles. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: The geometry field (shape) is automatically created and maintained by ArcGIS. It provides a definition of the feature type (point, line, polygon). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: TransectID Attribute_Definition: The TransectID relates directly to the original transect file Object Identifier, ObjectID or OID Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: unlimited 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: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: BaselineID Attribute_Definition: Values in this field correlate to the baseline attribute field ID and are assigned by DSAS to identify the baseline segment used to generate the measurement transect. Baseline segments assigned an ID = 0 are ignored by DSAS and no transects will be cast along those line segments. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: ShorelineI Attribute_Definition: Date of shoreline position; date of survey as determined from shoreline layer. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Date of the shoreline in mm/dd/yyyy Attribute: Attribute_Label: Distance Attribute_Definition: The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Decimal values may be positive or negative, which is used to indicate landward (negative) or seaward (positive) direction from baseline origin. Attribute: Attribute_Label: IntersectX Attribute_Definition: The X-coordinate location in eastings of the intersect point in WGS84 UTM19N. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 390324.256875 Range_Domain_Maximum: 416455.995027 Attribute: Attribute_Label: IntersectY Attribute_Definition: The Y-coordinate location in northings of the intersect point in WGS84 UTM19N. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4569927.717940 Range_Domain_Maximum: 4582770.774950 Attribute: Attribute_Label: Uncertaint Attribute_Definition: The uncertainty of the shoreline intersect point as defined by the positional-uncertainty value (DSAS_uncy) of the shoreline (ShorelineID). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: Bias_Dista Attribute_Definition: The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect with the proxy-datum bias applied. May be positive or negative depending on the orientation of the baseline. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -241.937383 Range_Domain_Maximum: 500.466767 Attribute: Attribute_Label: BIAS Attribute_Definition: The estimated unidirectional horizontal offset between the MHW elevation of the lidar data and the HWL shoreline position. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: BIAS_X Attribute_Definition: The X-coordinate location of the intersect point with the bias applied. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 390324.256036 Range_Domain_Maximum: 416455.994028 Attribute: Attribute_Label: BIAS_Y Attribute_Definition: The Y-coordinate location of the intersect point with the bias applied. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4569927.718920 Range_Domain_Maximum: 4582770.774860 Attribute: Attribute_Label: Bias_Uncer Attribute_Definition: This is an estimate of the uncertainty of the bias corrected shoreline. It is the shoreline uncertainty and the bias uncertainty added in quadrature. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Detailed_Description: Entity_Type: Entity_Type_Label: NantucketS_intersects_LT.shp Entity_Type_Definition: The intersection points are generated by DSAS where each DSAS generated transect crosses a shoreline. These intersections represent the shoreline position, and contain the data necessary for DSAS to compute long-term rates, with and without the proxy-datum bias. Point Object Count: 8900 Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number used as a unique identifier of an object within a table primarily used in shapefiles. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: The geometry field (shape) is automatically created and maintained by ArcGIS. It provides a definition of the feature type (point, line, polygon). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: TransectID Attribute_Definition: The TransectID relates directly to the original transect file Object Identifier, ObjectID or OID Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: unlimited 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: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: BaselineID Attribute_Definition: Values in this field correlate to the baseline attribute field ID and are assigned by DSAS to identify the baseline segment used to generate the measurement transect. Baseline segments assigned an ID = 0 are ignored by DSAS and no transects will be cast along those line segments. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: ShorelineI Attribute_Definition: Date of shoreline position; date of survey as determined from shoreline layer. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Date of the shoreline in mm/dd/yyyy Attribute: Attribute_Label: Distance Attribute_Definition: The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Decimal values may be positive or negative, which is used to indicate landward (negative) or seaward (positive) direction from baseline origin. Attribute: Attribute_Label: IntersectX Attribute_Definition: The X-coordinate location in eastings of the intersect point in WGS84 UTM19N. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 391927.323340 Range_Domain_Maximum: 419661.564240 Attribute: Attribute_Label: IntersectY Attribute_Definition: The Y-coordinate location in northings of the intersect point in WGS84 UTM19N. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4565606.338520 Range_Domain_Maximum: 4582993.106180 Attribute: Attribute_Label: Uncertaint Attribute_Definition: The uncertainty of the shoreline intersect point as defined by the positional-uncertainty value (DSAS_uncy) of the shoreline (ShorelineID). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: Bias_Dista Attribute_Definition: The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect with the proxy-datum bias applied. May be positive or negative depending on the orientation of the baseline. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -867.183515 Range_Domain_Maximum: 598.233840 Attribute: Attribute_Label: BIAS Attribute_Definition: The estimated unidirectional horizontal offset between the MHW elevation of the lidar data and the HWL shoreline position. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: BIAS_X Attribute_Definition: The X-coordinate location of the intersect point with the bias applied. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 391919.795010 Range_Domain_Maximum: 419671.276716 Attribute: Attribute_Label: BIAS_Y Attribute_Definition: The Y-coordinate location of the intersect point with the bias applied. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4565596.959460 Range_Domain_Maximum: 4583001.208540 Attribute: Attribute_Label: Bias_Uncer Attribute_Definition: This is an estimate of the uncertainty of the bias corrected shoreline. It is the shoreline uncertainty and the bias uncertainty added in quadrature Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Detailed_Description: Entity_Type: Entity_Type_Label: NantucketS_intersects_ST.shp Entity_Type_Definition: The intersection points are generated by DSAS where each DSAS generated transect crosses a shoreline. These intersections represent the shoreline position, and contain the data necessary for DSAS to compute short-term rates, with and without the proxy-datum bias. Point Object Count: 6334 Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number used as a unique identifier of an object within a table primarily used in shapefiles. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: The geometry field (shape) is automatically created and maintained by ArcGIS. It provides a definition of the feature type (point, line, polygon). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: TransectID Attribute_Definition: The TransectID relates directly to the original transect file Object Identifier, ObjectID or OID Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: unlimited 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: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: BaselineID Attribute_Definition: Values in this field correlate to the baseline attribute field ID and are assigned by DSAS to identify the baseline segment used to generate the measurement transect. Baseline segments assigned an ID = 0 are ignored by DSAS and no transects will be cast along those line segments. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: ShorelineI Attribute_Definition: Date of shoreline position; date of survey as determined from shoreline layer. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Date of the shoreline in mm/dd/yyyy Attribute: Attribute_Label: Distance Attribute_Definition: The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Decimal values may be positive or negative, which is used to indicate landward (negative) or seaward (positive) direction from baseline origin. Attribute: Attribute_Label: IntersectX Attribute_Definition: The X-coordinate location in eastings of the intersect point in WGS84 UTM19N. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 392834.500186 Range_Domain_Maximum: 419625.864793 Attribute: Attribute_Label: IntersectY Attribute_Definition: The Y-coordinate location in northings of the intersect point in WGS84 UTM19N. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4565729.042400 Range_Domain_Maximum: 4582886.785340 Attribute: Attribute_Label: Uncertaint Attribute_Definition: The uncertainty of the shoreline intersect point as defined by the positional-uncertainty value (DSAS_uncy) of the shoreline (ShorelineID). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: Bias_Dista Attribute_Definition: The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect with the proxy-datum bias applied. May be positive or negative depending on the orientation of the baseline. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -876.788089 Range_Domain_Maximum: 100.433676 Attribute: Attribute_Label: BIAS Attribute_Definition: The estimated unidirectional horizontal offset between the MHW elevation of the lidar data and the HWL shoreline position. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Attribute: Attribute_Label: BIAS_X Attribute_Definition: The X-coordinate location of the intersect point with the bias applied. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 392826.971857 Range_Domain_Maximum: 419635.588273 Attribute: Attribute_Label: BIAS_Y Attribute_Definition: The Y-coordinate location of the intersect point with the bias applied. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4565719.648470 Range_Domain_Maximum: 4582894.887690 Attribute: Attribute_Label: Bias_Uncer Attribute_Definition: This is an estimate of the uncertainty of the bias corrected shoreline. It is the shoreline uncertainty and the bias uncertainty added in quadrature Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: unlimited Overview_Description: Entity_and_Attribute_Overview: The entity and attribute information provided here describes the tabular data associated with the intersects needed to calculate long-term (greater than 50 years, and typically closer to 100 years) and short-term (approximately 30 years) shoreline change rates. Please review the individual attribute descriptions for detailed information. All calculations for length are in meter units and were based on the UTM zone 19N WGS 84 projection. This region has two shapefiles describing intersects, long-term and short-term. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey-ScienceBase Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - GS ScienceBase Contact_Address: Address_Type: mailing and physical address Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Country: United States Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: The dataset contains the point intersections used for the analysis of shoreline data, (SHP and other shapefile components), browse graphic, 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. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), and have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. 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 10.7.1 Format_Specification: Esri point shapefile Format_Information_Content: These files (.cpg, .dbf, .prj, .sbn, .sbx, .shp, .shp., and .shx) are a collection of files with a common filename prefix and must be downloaded and stored in the same directory. Together they are the components of the shapefile and include FGDC CSDGM-compliant metadata. File_Decompression_Technique: no compression applied Transfer_Size: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/6108308dd34ef8d70565bd53 Network_Resource_Name: https://www.sciencebase.gov/catalog/item/6108308dd34ef8d70565bd53 Network_Resource_Name: https://doi.org/10.5066/P9YGIYFX 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 point shapefile format. The user must have software to read and process the data components of a shapefile. Metadata_Reference_Information: Metadata_Date: 20210831 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: 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_Facsimile_Telephone: 508-547-2310 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