Metadata: Identification_Information: Citation: Citation_Information: Originator: Daniel D. Buscombe Originator: Joseph Burgess Originator: Kara S. Doran Originator: Sharon N. Batiste Originator: Ann E. Gibbs Originator: Rachel E. Henderson Originator: Julia L. Heslin Originator: Catherine N. Janda Originator: Mark A. Lundine Originator: Andrea C. O'Neill Originator: Joseph F. Terrano Originator: Jonathan A. Warrick Originator: Kathryn M. Weber Publication_Date: 20250425 Title: Satellite-derived shoreline positions from CoastSeg in multiple U.S. locations (1984-2023) Geospatial_Data_Presentation_Form: Shoreline positions along transects in comma-separated value formats Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P1NUEFDP Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P1NUEFDP Larger_Work_Citation: Citation_Information: Originator: Daniel D. Buscombe Originator: Joseph Burgess Originator: Kara S. Doran Originator: Sharon N. Batiste Originator: Ann E. Gibbs Originator: Rachel E. Henderson Originator: Julia L. Heslin Originator: Catherine N. Janda Originator: Mark A. Lundine Originator: Andrea C. O'Neill Originator: Joseph F. Terrano Originator: Jonathan A. Warrick Originator: Kathryn M. Weber Publication_Date: 2025 Title: Satellite-derived shorelines from CoastSeg in multiple U.S. locations (1984-2023) Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P1NUEFDP Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested Citation: Buscombe, D., Burgess, J., Doran, K., Fitzpatrick, S., Gibbs, A., Henderson, R., Heslin, J., Janda, C., Lundine, M., O'Neill, A.C., Terrano, J., Warrick, J., and Weber, K., 2025, Satellite-derived shorelines from CoastSeg in multiple U.S. locations (1984-2023): U.S. Geological Survey data release, https://doi.org/10.5066/P1NUEFDP. Online_Linkage: https://doi.org/10.5066/P1NUEFDP Description: Abstract: This dataset contains shoreline positions derived from available satellite imagery for multiple locations (Barter Island, Alaska; Elwha, Washington; Cape Cod, Massachusetts; Madeira Beach, Florida; and Rincon, Puerto Rico) across the United States for the time period 1984 to 2023. An open-source toolbox, CoastSeg (Fitzpatrick and others, 2024a; Fitzpatrick and others, 2024b), was used to classify coastal Landsat and Sentinel imagery and detect shorelines at the sub-pixel scale, using the CoastSat (Vos and others, 2019) methodology. Shorelines are derived for multiple slope values, representing the spatial and temporal variance of slope conditions at each site. Resulting shoreline positions are presented as discrete points in comma-separated value (CSV) format. Significant uncertainty is associated with the locations of shorelines in extremely dynamic regions at all sites, including at the locations of river mouths, tidal inlets, capes, ends of spits, and adjacent to wetlands at the Barter Island site. For technical users and researchers, data can be ingested into geospatial platforms (for example, QGIS or GlobalMapper) for more detailed analysis. Purpose: These data provide automatically detected estimates of coastal shoreline positions to support ongoing validation and development of automated feature detection methods, and can be used by science researchers, engineers, students, and the general public. These data can be used with geographic information systems, shoreline evolution models, or other software to assist in identifying and assessing possible areas of vulnerability, along with appropriate inclusion of uncertainty. These data are not intended to be used for navigation. Supplemental_Information: This data release was funded by the USGS Coastal and Marine Hazards and Resources Program. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1984 Ending_Date: 2023 Currentness_Reference: collection years of satellite imagery used to determine shoreline positions Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -143.83834890 East_Bounding_Coordinate: -67.23436190 North_Bounding_Coordinate: 70.15710875 South_Bounding_Coordinate: 18.31396108 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:16c3902f-65fc-4126-b6e6-e9a0460ab6aa Theme: Theme_Keyword_Thesaurus: Global Change Master Directory Theme_Keyword: Shorelines Theme_Keyword: Shoreline mapping Theme_Keyword: Beaches Theme_Keyword: Erosion Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: Oceans Theme_Keyword: ClimatologyMeteorologyAtmosphere Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: Physical Habitats and Geomorphology Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: image collections Theme_Keyword: remote sensing Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: coastal processes Theme_Keyword: effects of coastal change Theme_Keyword: shoreline erosion Theme_Keyword: shoreline accretion Theme_Keyword: beach Theme_Keyword: coast Theme_Keyword: storm erosion Theme_Keyword: long term erosion Theme_Keyword: remote sensing Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Pacific Coastal and Marine Science Center Theme_Keyword: PCMSC Theme_Keyword: St. Petersburg Coastal and Marine Science Center Theme_Keyword: SPCMSC Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: State of Alaska Place_Keyword: State of Washington Place_Keyword: Commonwealth of Massachusetts Place_Keyword: State of Florida Place_Keyword: Commonwealth of Puerto Rico Access_Constraints: No access constraints. Use_Constraints: USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: SDS_positions_multiplelocations_1984-2023.png Browse_Graphic_File_Description: Image map showing study areas for satellite-derived shoreline positions in multiple locations. Browse_Graphic_File_Type: png Data_Set_Credit: This data release was funded by the USGS Coastal and Marine Hazards and Resources Program. Native_Data_Set_Environment: The datasets were created in a Windows 11 Operating system, using python 3.7. Results were output and saved as comma separated value and GeoJSON files. Cross_Reference: Citation_Information: Originator: Fitzpatrick, S. Originator: Buscombe, D. Originator: Warrick, J.A. Originator: Lundine, M.A. Originator: Vos, K. Publication_Date: 2024 Title: CoastSeg: an accessible and extendable hub for satellite-derived-shoreline (SDS) detection and mapping Other_Citation_Details: Fitzpatrick, S., Buscombe, D., Warrick, J.A., Lundine, M.A., and Vos, K., 2024a, CoastSeg: an accessible and extendable hub for satellite-derived-shoreline (SDS) detection and mapping: Journal of Open Source Software, v. 99(99), 6683. Online_Linkage: https://doi.org/10.21105/joss.06683 Cross_Reference: Citation_Information: Originator: Fitzpatrick, S. Originator: Buscombe, D. Originator: Warrick, J.A. Originator: Lundine, M.A. Originator: Vos, K. Publication_Date: 2024 Title: CoastSeg: an accessible and extendable hub for satellite-derived-shoreline (SDS) detection and mapping Other_Citation_Details: Fitzpatrick, S., Buscombe, D., Warrick, J.A., Lundine, M.A., and Vos, K., 2024b, CoastSeg: an accessible and extendable hub for satellite-derived-shoreline (SDS) detection and mapping: (v1.2.9). Zenodo. https://doi.org/10.5281/zenodo.12555413 Online_Linkage: https://doi.org/10.5281/zenodo.12555413 Cross_Reference: Citation_Information: Originator: Buscombe, D. Originator: Fitzpatrick, S. Publication_Date: 2023 Title: CoastSeg: Beach transects and beachface slope database v1.0 (Version v1.0) Other_Citation_Details: Buscombe, D., & Fitzpatrick, S., 2023, CoastSeg: Beach transects and beachface slope database v1.0 (v1.0). Zenodo. https://doi.org/10.5281/zenodo.8187949 Online_Linkage: https://doi.org/10.5281/zenodo.8187949 Cross_Reference: Citation_Information: Originator: Vos, K. Originator: Splinter, K.D. Originator: Harley, M.D. Originator: Simmons, J.A. Originator: Turner, I.L. Publication_Date: 2019 Title: CoastSat: A Google Earth Engine-enabled Python toolkit to extract shorelines from publicly available satellite imagery Other_Citation_Details: Vos, K., Splinter, K.D., Harley, M.D., Simmons, J.A., and Turner, I.L., 2019, CoastSat: A Google Earth Engine-enabled Python toolkit to extract shorelines from publicly available satellite imagery: Environmental Modelling and Software, v. 122, 104528. Online_Linkage: https://doi.org/10.1016/j.envsoft.2019.104528 Cross_Reference: Citation_Information: Originator: Himmelstoss, E.A. Originator: Farris, A.S. Originator: Henderson, R.E. Originator: Kratzmann, M.G. Originator: Ergul, A. Originator: Zhang, O. Originator: Zichichi, J.L. Originator: Thieler, E.R. Publication_Date: 2021 Title: Digital Shoreline Analysis System (version 5.1) Other_Citation_Details: Himmelstoss, E.A., Farris, A.S., Henderson, R.E., Kratzmann, M.G., Ergul, A., Zhang, O., Zichichi, J.L., Thieler, E.R., 2021, Digital Shoreline Analysis System (version 5.1): U.S. Geological Survey software release, https://code.usgs.gov/cch/dsas. Online_Linkage: https://code.usgs.gov/cch/dsas Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Attribute values are estimates of shoreline position based on satellite imagery. The accuracy of this method was assessed by Vos and others (2019), who compared data with ground-based surveys at Duck, North Carolina. In line with these estimates, a cross-shore horizontal error of 10 m (root mean square error) can be used in most locations. In dynamic locations, including areas such as river mouths, capes, ends of spits, and adjacent to wetlands in Barter Island, uncertainty is greater, and positions should be inspected and used with care. Logical_Consistency_Report: Data have undergone QA/QC and fall within expected/reasonable ranges. Completeness_Report: Data set is considered complete for the information presented. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Data are concurrent with specified transect locations. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: There has not been a formal accuracy assessment of vertical position in this dataset and/or is not applicable. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2025 Title: Landsat imagery (from Landsat 5) Geospatial_Data_Presentation_Form: PNG image Publication_Information: Publication_Place: online Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9IAXOVV Type_of_Source_Media: online database Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1984 Ending_Date: 2023 Source_Currentness_Reference: collection years of satellite imagery Source_Citation_Abbreviation: Landsat imagery Source_Contribution: The archive of Landsat 5 satellite imagery was accessed through Google Earth Engine and was used to derive shoreline positions for the study area. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2025 Title: Landsat imagery (from Landsat 7) Geospatial_Data_Presentation_Form: PNG image Publication_Information: Publication_Place: online Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9C7I13B Type_of_Source_Media: online database Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1984 Ending_Date: 2023 Source_Currentness_Reference: collection years of satellite imagery Source_Citation_Abbreviation: Landsat imagery Source_Contribution: The archive of Landsat 7 satellite imagery was accessed through Google Earth Engine and was used to derive shoreline positions for the study area. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2023 Title: Landsat 8-9 imagery for multiple locations Geospatial_Data_Presentation_Form: image Publication_Information: Publication_Place: online Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P975CC9B Type_of_Source_Media: online database Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20240201 Source_Currentness_Reference: date of access Source_Citation_Abbreviation: Landsat 8-9 imagery Source_Contribution: The archive of Landsat 8-9 satellite imagery was used to derive shoreline positions for the study area. Source_Information: Source_Citation: Citation_Information: Originator: European Space Agency Publication_Date: 2023 Title: Sentinel 2 imagery for multiple locations Geospatial_Data_Presentation_Form: image Publication_Information: Publication_Place: online Publisher: Copernicus Online_Linkage: https://dataspace.copernicus.eu/explore-data/data-collections/sentinel-data/sentinel-2 Type_of_Source_Media: online database Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20240201 Source_Currentness_Reference: date of access Source_Citation_Abbreviation: Sentinel 2 imagery Source_Contribution: The archive of Sentinel 2 satellite imagery was used to derive shoreline positions for the study area. Source_Information: Source_Citation: Citation_Information: Originator: Carrere, L. Originator: Lyard, F. Originator: Cancet, M. Originator: Guillot, A. Originator: Picot, N. Publication_Date: 20160501 Title: FES (Finite Element Solution) 2014, a new tidal model—Validation results and perspectives for improvements Geospatial_Data_Presentation_Form: model Publication_Information: Publication_Place: online Publisher: AVISO Online_Linkage: https://www.aviso.altimetry.fr/en/data/products/auxiliary-products/global-tide-fes/description-fes2014.html Type_of_Source_Media: online model Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20160501 Source_Currentness_Reference: tide height predictions using a finite element solution model Source_Citation_Abbreviation: FES 2014 Source_Contribution: Tidal corrections in the shoreline position were made with tide height predicted from the FES 2014 model. Source_Information: Source_Citation: Citation_Information: Originator: Gibbs, A.E. Originator: Nolan, M. Originator: Snyder, A.G. Publication_Date: 20190226 Title: Orthophotomosaics, elevation point clouds, digital surface elevation models and supporting data from the north coast of Barter Island, Alaska Geospatial_Data_Presentation_Form: GeoTIFF Publication_Information: Publication_Place: online Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9964TKX Type_of_Source_Media: online dataset Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20240430 Source_Currentness_Reference: date of access Source_Citation_Abbreviation: Barter slopes Source_Contribution: beach slope data used to correct shoreline positions for tidal water levels Source_Information: Source_Citation: Citation_Information: Originator: Farris, A.S. Originator: Weber, K.M. Originator: List, J.H. Publication_Date: 20200922 Title: Mean high water shorelines for the Outer Cape of Massachusetts from Nauset Inlet to Race Point (1998-2005) Geospatial_Data_Presentation_Form: NetCDF Publication_Information: Publication_Place: online Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9GWL52F Type_of_Source_Media: online dataset Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20240430 Source_Currentness_Reference: date of access Source_Citation_Abbreviation: Cape Cod slopes Source_Contribution: beach slope data used to correct shoreline positions for tidal water levels Source_Information: Source_Citation: Citation_Information: Originator: Stevens, A.W. Originator: Gelfenbaum, G. Originator: Warrick, J.A. Originator: Miller, I.M. Originator: Weiner, H.M. Publication_Date: 20171208 Title: Bathymetry, topography, and sediment grain-size data from the Elwha River delta, Washington (ver. 5.0, November 2024) Geospatial_Data_Presentation_Form: CSV Publication_Information: Publication_Place: online Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F72N51GC Type_of_Source_Media: online dataset Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20240430 Source_Currentness_Reference: date of access Source_Citation_Abbreviation: Elwha slopes Source_Contribution: beach slope data used to correct shoreline positions for tidal water levels Source_Information: Source_Citation: Citation_Information: Originator: Brown, J.A. Originator: Birchler J.J. Originator: Thompson, D.M. Originator: Long, J.W. Originator: Seymour, A.C. Publication_Date: 20180314 Title: Beach Profile Data Collected From Madeira Beach, Florida Geospatial_Data_Presentation_Form: text files Publication_Information: Publication_Place: online Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F7T43S94 Type_of_Source_Media: online dataset Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20240430 Source_Currentness_Reference: date of access Source_Citation_Abbreviation: Madeira slopes Source_Contribution: beach slope data used to correct shoreline positions for tidal water levels Source_Information: Source_Citation: Citation_Information: Originator: Doran, K.S. Originator: Long, J.W. Originator: Birchler, J.J. Originator: Brenner, O.W. Originator: Hardy, M.W. Originator: Morgan, K.L.M. Originator: Stockdon, H.F. Originator: Torres, M.L. Publication_Date: 20170805 Title: Lidar-derived Beach Morphology (Dune Crest, Dune Toe, and Shoreline) for U.S. Sandy Coastlines Geospatial_Data_Presentation_Form: text files Publication_Information: Publication_Place: online Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F7GF0S0Z Type_of_Source_Media: online dataset Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20240430 Source_Currentness_Reference: date of access Source_Citation_Abbreviation: Rincon slopes Source_Contribution: beach slope data used to correct shoreline positions for tidal water levels Process_Step: Process_Description: Set up CoastSeg program (Fitzpatrick and others, 2024a; Fitzpatrick and others, 2024b; Buscombe and Fitzpatrick, 2023) for each location. CoastSeg is set up using python 3.7 installed via pip into a conda environment. Regions of Interest (ROIs), transects, and reference shorelines were generated, as included in this data release. For Barter Island, ROIs were generated outside CoastSeg, using the standard CoastSeg sizes, to preserve recommended land-ocean area ratios (Vos and others, 2019) around complex coastlines. In Cape Cod, Elwha, Madeira, and Rincon, ROIs were generated within CoastSeg. Transects were generated outside CoastSeg for all locations and setup to have 30m – 140m alongshore spacing. DSAS (Himmelstoss and others, 2018) was used for Barter Island, Cape Cod, Madeira, and Rincon, to adjust transect orientation (with landward origin point) and consecutive transect labels. CoastSeg’s default reference shoreline was used in Cape Cod, Madeira Beach, and Rincon. In Barter Island and Elwha, a reference shoreline was created outside CoastSeg to reflect older shoreline positions and significant shoreline change over the observation period. These and other settings used at each site are explicitly listed in the shoreline vectors files, included in this data release. See Fitzpatrick and others (2024a, 2024b) and Vos and others (2019) for details on settings, ROIs, transects, reference shorelines, and using CoastSeg. Process_Date: 20230901 Process_Step: Process_Description: After initial setup of ROIs, transects, reference shorelines and settings, the CoastSeg program was run to download all available imagery for satellites (Landsat 5, 7, 8, and 9 for all locations, and also Sentinel 2 for Barter Island) between 1 January 1984 and 31 December 2023. For Barter Island, imagery collected during months when sea-ice is typically present (October – May) were removed. Source_Used_Citation_Abbreviation: Landsat imagery Source_Used_Citation_Abbreviation: Landsat 8-9 imagery Source_Used_Citation_Abbreviation: Sentinel imagery Process_Date: 20240201 Process_Step: Process_Description: After all imagery was downloaded, shorelines were detected within each ROI. Initial shoreline detection images were reviewed and images with bad detections, due to clouds and weather, were manually removed from analysis and the shoreline detection process-step was repeated in CoastSeg. Output from this step included CSV and GeoJSON data for raw (not tidally corrected) shoreline positions. Source_Used_Citation_Abbreviation: Landsat imagery Source_Used_Citation_Abbreviation: Landsat 8-9 imagery Source_Used_Citation_Abbreviation: Sentinel imagery Process_Date: 20240430 Source_Produced_Citation_Abbreviation: uncorrected shorelines Process_Step: Process_Description: Once raw, uncorrected shoreline positions were generated, tidal corrections were conducted using three different slope values (average, high and low) to show the variance of beach slope conditions at each site. Slope values were determined from in situ beach survey and elevation data. Average slope values were defined as the mean from respective datasets for Cape Cod, Elwha and Madeira Beach (Farris and others, 2020; Stevens and others, 2017; Brown and others, 2018), and high/low slope values were defined as +/- 2 standard deviations away from the mean. Because detailed slope data was not available at Barter Island for the study period, slopes at Barter Island were determined empirically from various locations across the site based on elevation data from 2014-2015 (Gibbs and others, 2019). Average, low, and high slope values were derived from the aggregate data (as mean, minimum, and maximum, respectively). Slope values were similarly determined at Rincon based on the elevation dataset from Doran and others (2018). Average/high/low slope values used for Barter Island are 0.07/0.15/0.01; values for Cape Cod are 0.13/0.201/0.061; values for Elwha are 0.125/0.15/.01; values for Madeira are 0.08/0.1596/0.033; and values for Rincon are 0.1287/0.3968/0.0211. Output from this step included tidally corrected CSV and GeoJSON shoreline positions. Tidal corrections were applied using tide heights estimated from the FES 2014 Tidal model. Source_Used_Citation_Abbreviation: FES 2014 Source_Used_Citation_Abbreviation: uncorrected shorelines Source_Used_Citation_Abbreviation: Barter slopes Source_Used_Citation_Abbreviation: Cape Cod slopes Source_Used_Citation_Abbreviation: Elwha slopes Source_Used_Citation_Abbreviation: Madeira slopes Source_Used_Citation_Abbreviation: Rincon slopes Process_Date: 2024090 Process_Step: Process_Description: Output was checked to ensure quality results. In dynamic locations, including areas such as river mouths, capes, and ends of spits, uncertainty can increase, and shorelines in these locations should be inspected and used with care. Process_Date: 20241215 Process_Step: Process_Description: Data were packaged and prepared for data release. Data are zipped together by location and labeled according to whether the SDS are uncorrected or are tidally corrected (using average, high, or low beach slope values). GeoJSON files contain both the CoastSeg setup settings (including ROI, transects, and reference shoreline), and the output shorelines as vectors where vertices are the positions along each transect. CSV files contain the shoreline positions along each transect. Process_Date: 20250117 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: point Point_and_Vector_Object_Count: 835012 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0000000000001 Longitude_Resolution: 0.0000000000001 Geographic_Coordinate_Units: Decimal Degrees Geodetic_Model: Horizontal_Datum_Name: World Geodetic System 1984 (WGS84) Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: Mean Sea Level Depth_Resolution: 0.1 Depth_Distance_Units: meters Depth_Encoding_Method: Implicit coordinate Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Shoreline positions for historical period (1984-2023) for multiple locations derived from satellite imagery Entity_Type_Definition: CSV file consists of shoreline positions derived from imagery for multiple locations across the United States Entity_Type_Definition_Source: Producer Defined Attribute: Attribute_Label: dates Attribute_Definition: Date and time of projected data (UTC) in yyyy-mm-dd HH:MM:ss format (where yyyy is 4 digit year, mm is 2-digit month, dd is 2-digit day, HH is hour in 24-hour notation, MM is minute, and ss is seconds). Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1984-01-01 00:00:00 Range_Domain_Maximum: 2023-12-31 00:00:00 Attribute_Units_of_Measure: yyyy-mm-dd HH:MM:ss Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: x Attribute_Definition: Ending position (x coordinate) of transect. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -143.79837210000000 Range_Domain_Maximum: -67.24343491000000 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.000000000000001 Attribute: Attribute_Label: y Attribute_Definition: Ending position (y coordinate) of transect. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 18.314209620577572 Range_Domain_Maximum: 70.151752936249068 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.000000000000001 Attribute: Attribute_Label: start_x Attribute_Definition: Starting position (x coordinate) of transect. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -143.77516520000000 Range_Domain_Maximum: -67.24289353000000 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.000000000000001 Attribute: Attribute_Label: start_y Attribute_Definition: Starting position (y coordinate) of transect. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 18.314553410000000 Range_Domain_Maximum: 70.145102510900000 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.000000000000001 Attribute: Attribute_Label: tide Attribute_Definition: Tide height correction (referenced to mean sea level) used for derived shoreline position in tidally-corrected files. Values of -9999 indicate no tidal correction. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -2.387668117063054 Range_Domain_Maximum: 2.336757955600731 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: 0.000000000000001 Attribute: Attribute_Label: transect_id Attribute_Definition: Transect along which shoreline position is derived from satellite imagery for date and time indicated. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 772 Attribute_Units_of_Measure: integer identification Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: cross_distance Attribute_Definition: Distance of derived shoreline position along transect. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -117.8106367952858 Range_Domain_Maximum: 1013.6340600000000 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: 0.0000000000001 Attribute: Attribute_Label: shore_x Attribute_Definition: Position (x coordinate) of shoreline derived from satellite imagery for date and time indicated. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -143.7983338000000 Range_Domain_Maximum: -67.2434349100000 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.000000000000001 Attribute: Attribute_Label: shore_y Attribute_Definition: Position (y coordinate) of shoreline derived from satellite imagery for date and time indicated. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 18.314210372000000 Range_Domain_Maximum: 70.151132107101674 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.000000000000001 Attribute: Attribute_Label: satname Attribute_Definition: Abbreviated name of satellite (Landsat 5-9, Sentinel 2) which collected imagery for date and time indicated. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Codeset_Domain: Codeset_Name: L5, L7, L8, L9, S2 Codeset_Source: Producer Defined Overview_Description: Entity_and_Attribute_Overview: The first line of the CSV is a header line. Files are packaged into zip files by site location (for example, satellite-derived-shoreline_transect_time_series_BarterIsland.zip), and individual files are named for the correction (for example, averageslopecorrection_transect_shoreline_timeseries_Barter.csv is the file for Barter Island and the average slope tidal correction). Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - CMGDS Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Resource_Description: These data are available in CSV format by location. Shorelines are identified as points along transects (ID), and transect start and end points are included in the CSV. Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: comma-delimited text Format_Information_Content: Zip file contains CSV files for Barter Island File_Decompression_Technique: Zip Transfer_Size: 11.2 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P1NUEFDP Access_Instructions: Data can be downloaded using the Network_Resource_Name link then scrolling down to the Satellite Data section. Digital_Form: Digital_Transfer_Information: Format_Name: comma-delimited text Format_Information_Content: Zip file contains CSV files for Cape Cod File_Decompression_Technique: Zip Transfer_Size: 11.0 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P1NUEFDP Access_Instructions: Data can be downloaded using the Network_Resource_Name link then scrolling down to the Satellite Data section. Digital_Form: Digital_Transfer_Information: Format_Name: comma-delimited text Format_Information_Content: Zip file contains CSV files for Elwha File_Decompression_Technique: Zip Transfer_Size: 2.1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P1NUEFDP Access_Instructions: Data can be downloaded using the Network_Resource_Name link then scrolling down to the Satellite Data section. Digital_Form: Digital_Transfer_Information: Format_Name: comma-delimited text Format_Information_Content: Zip file contains CSV files for Madeira Beach File_Decompression_Technique: Zip Transfer_Size: 0.2069 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P1NUEFDP Access_Instructions: Data can be downloaded using the Network_Resource_Name link then scrolling down to the Satellite Data section. Digital_Form: Digital_Transfer_Information: Format_Name: comma-delimited text Format_Information_Content: Zip file contains CSV files for Rincon File_Decompression_Technique: Zip Transfer_Size: 1.7 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P1NUEFDP Access_Instructions: Data can be downloaded using the Network_Resource_Name link then scrolling down to the Satellite Data section. Fees: None. Technical_Prerequisites: These data can be viewed with GIS software such as Arc, Global Mapper or QGIS, or numerical processing software such as python or Matlab. Metadata_Reference_Information: Metadata_Date: 20250425 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998