Metadata: Identification_Information: Citation: Citation_Information: Originator: Rachel E. Henderson Originator: Julia L. Heslin Originator: Emily A. Himmelstoss Publication_Date: 20211119 Title: Shoreline change rates for the coast of Puerto Rico's main island calculated using the Digital Shoreline Analysis System version 5.1 (ver. 2.0, March 2023) Edition: 2.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9FNRRN0 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://doi.org/10.5066/P9FNRRN0 Online_Linkage: https://www.sciencebase.gov/catalog/item/6149fa12d34e0df5fb96fc1c Larger_Work_Citation: Citation_Information: Originator: Rachel E. Henderson Originator: Julia L. Heslin Originator: Emily A. Himmelstoss Publication_Date: 2021 Title: Puerto Rico shoreline change — A GIS compilation of shorelines, baselines, intersects, and change rates calculated using the Digital Shoreline Analysis system version 5.1 (ver. 2.0, March 2023) Edition: 2.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9FNRRN0 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: suggested citation: Henderson, R.E., Heslin, J.L., and Himmelstoss, E.A., 2021, Puerto Rico shoreline change — A GIS compilation of shorelines, baselines, intersects, and change rates calculated using the Digital Shoreline Analysis system version 5.1 (ver. 2.0, March 2023): U.S. Geological Survey data release, https://doi.org/10.5066/P9FNRRN0. Online_Linkage: https://doi.org/10.5066/P9FNRRN0 Online_Linkage: https://www.sciencebase.gov/catalog/item/61255b87d34e40dd9c03f390 Description: Abstract: The U.S. Geological Survey (USGS) maintains shoreline positions for the United States coasts from both older sources, such as aerial photographs or topographic surveys, and contemporary sources, such as lidar-point clouds and digital elevation models. These shorelines are compiled and analyzed in the USGS Digital Shoreline Analysis System (DSAS), version 5.1 software to calculate rates of change. Keeping a record of historical shoreline positions is an effective method to monitor change over time, enabling scientists to identify areas most susceptible to erosion or accretion. These data can help coastal managers understand which areas of the coast are vulnerable to change. This data release, and other associated products, represent an expansion of the USGS national-scale shoreline database to include Puerto Rico and its islands, Vieques and Culebra. The USGS, in cooperation with the Coastal Research and Planning Institute of Puerto Rico—part of the Graduate School of Planning at the University of Puerto Rico, Rio Piedras Campus—has derived and compiled a database of historical shoreline positions using a variety of methods. These historical shoreline data are then used to measure the rate of shoreline change over time. Rate calculations are computed within a geographic information system (GIS) using the DSAS version 5.1 software. Starting from a user defined baseline, measurement transects are created by DSAS that intersect the shoreline vectors. The resulting intersections provide the location and time information necessary to calculate rates of shoreline change. The overall project contains shorelines, baselines, shoreline change rates (long-term and short-term), and shoreline intersects (long-term and short-term), for Puerto Rico, and the adjacent islands of Vieques and Culebra. Purpose: The datasets described by this metadata file include the long-term (~120 years) and short-term (~40 years) shoreline change rates for the coastal region of Puerto Rico’s Main Island. Rate calculations were computed within a GIS using DSAS version 5.1, an ArcGIS extension developed by the U.S. Geological Survey. A reference baseline was used as the originating point for the orthogonal transects cast by the DSAS software. The transects intersect each shoreline establishing measurement points which provide location and time information used to calculate rates of change. Long-term and short-term rates of shoreline change were calculated using a linear regression rate based on available shoreline data. Supplemental_Information: Version 2.0 includes rate calculations using the PR shorelines dataset updated with an additional lidar shoreline from 2014/2015 (Heslin and others, 2021). Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1901 Ending_Date: 2018 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -67.272143 East_Bounding_Coordinate: -65.5886 North_Bounding_Coordinate: 18.5171 South_Bounding_Coordinate: 17.9257 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Theme_Keyword: environment Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Shorelines Theme_Keyword: Historical Shoreline Theme_Keyword: Long-term shoreline change rate Theme_Keyword: Short-term shoreline change rate Theme_Keyword: Shoreline change rate Theme_Keyword: Erosion Theme_Keyword: Accretion Theme_Keyword: Linear Regression Rate Theme_Keyword: LRR Theme_Keyword: Transect Theme_Keyword: Digital Shoreline Analysis System Theme_Keyword: DSAS Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: Puerto Rico Shoreline Change Theme_Keyword: University of Puerto Rico Theme_Keyword: University of Puerto Rico Graduate School of Planning Theme_Keyword: Coastal Research and Planning Institute of Puerto Rico Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geospatial datasets Theme_Keyword: coastal processes Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:6149fa12d34e0df5fb96fc1c Place: Place_Keyword_Thesaurus: None Place_Keyword: Atlantic Coast Place_Keyword: United States Place_Keyword: Caribbean Place_Keyword: Puerto Rico 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: Rachel E. Henderson Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: 508-548-8700 Contact_Electronic_Mail_Address: rehenderson@contractor.usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/6149fa12d34e0df5fb96fc1c?name=PR_ShorelineChange_Rates.jpg Browse_Graphic_File_Description: Map of shoreline change rates (long-term) for the main island of Puerto Rico from the 1900s to 2018. Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Microsoft Windows 10 Enterprise; Esri ArcGIS 10.6 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: 2021 Title: Digital Shoreline Analysis System (version 5.1): U.S. Geological Survey Software Series_Information: Series_Name: USGS Software Release Issue_Identification: version 5.1 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Current version of software at time of use was 5.1 Online_Linkage: https://doi.org/10.5066/P9VW42I0 Online_Linkage: https://code.usgs.gov/cch/dsas/ Online_Linkage: https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas Cross_Reference: Citation_Information: Originator: Emily A. Himmelstoss Originator: Rachel E. Henderson Originator: Meredith G. Kratzmann Originator: Amy S. Farris Publication_Date: 2021 Title: Digital Shoreline Analysis System (DSAS) Version 5.1 User Guide Geospatial_Data_Presentation_Form: publication Series_Information: Series_Name: Open-File Report Issue_Identification: 2021-1091 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.3133/ofr20211091 Online_Linkage: https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas Cross_Reference: Citation_Information: Originator: Julia L. Heslin Originator: Rachel E. Henderson Originator: Emily A. Himmelstoss Publication_Date: 2021 Title: A GIS Compilation of Vector Shorelines for Puerto Rico from 2015 to 2018 Edition: 1 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9AZYW74 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9AZYW74 Online_Linkage: https://www.sciencebase.gov/catalog/item/610abe37d34ef8d70568937a Cross_Reference: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2021 Title: Historical Shorelines for Puerto Rico from 1901 to 1987 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9CLXCEG Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9CLXCEG Online_Linkage: https://www.sciencebase.gov/catalog/item/60cb7627d34e86b938a3a1b0 Cross_Reference: Citation_Information: Originator: Loderay Bracero-Marrero Originator: Maritza Barreto-Orta Originator: Nias Hernández-Montcourt Originator: Rubén Maldonado-González Originator: Emily A. Himmelstoss Originator: Julia L. Heslin Publication_Date: 2021 Title: A GIS Compilation of Vector Shorelines and Shoreline Classification for Puerto Rico from 1970 and 2010 Edition: 1 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: doi:10.5066/P9SEUAHC Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: suggested citation: Bracero-Marrero, L., Barreto-Orta, M., Hernández-Montcourt, N., Maldonado-González, R., Himmelstoss, E.A., Heslin, J.L. 2021, A GIS Compilation of Vector Shorelines and Shoreline Classification for Puerto Rico from 1970 and 2010: U.S. Geological Survey data release, https://doi.org/10.5066/P9SEUAHC Online_Linkage: https://doi.org/10.5066/P9SEUAHC Online_Linkage: https://www.sciencebase.gov/catalog/item/610ae914d34ef8d70568fba9 Cross_Reference: Citation_Information: Originator: E.R. Thieler Originator: R.W. Rodriguez Originator: Emily A. Himmelstoss Publication_Date: 2007 Title: Historical Changes at Rincon, Puerto Rico, 1936-2006 Edition: 1 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: U.S.Geological Survey Open File Report Issue_Identification: doi:10.3133/ofr20071017 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.3133/ofr20071017 Online_Linkage: https://pubs.er.usgs.gov/publication/ofr20071017 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 transect layer or during the calculation of shoreline change rates performed by the software. Logical_Consistency_Report: These data were generated using DSAS v5.1. The transects automatically generated by the software were visually inspected along with the shoreline data prior to rate calculations. If needed, transect positions were manually edited within a standard ArcMap edit session to adjust the position at which individual transects intersect the shorelines to better represent an orthogonal position to the general trend of the coast over time. Completeness_Report: This dataset contains the transects generated by the DSAS software application that were used to calculate shoreline change rates for the region. Additional transects may have been generated but did not meet the required number of shorelines or time period requirements. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The uncertainty of the linear regression rate is estimated by the elements LR2, LSE and LCI90. See the attribute definition of each for more information. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Julia L. Heslin Originator: Rachel E. Henderson Originator: Emily A. Himmelstoss Publication_Date: 2021 Title: Shorelines for Vieques, Culebra, and the main island of Puerto Rico from the 1900s to 2018 (ver. 2.0, March 2023) Edition: 2 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9FNRRN0 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9FNRRN0 Online_Linkage: https://www.sciencebase.gov/catalog/item/6149f75fd34e0df5fb96fbe9 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2021 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: PR_Shorelines Source_Contribution: Shoreline data from four corresponding Puerto Rico shorelines Data releases which have been merged into a single feature class (PR_shorelines). Note the range of shoreline dates will vary by location. Source_Information: Source_Citation: Citation_Information: Originator: Julia L. Heslin Originator: Rachel E. Henderson Originator: Emily A. Himmelstoss Publication_Date: 2021 Title: Baseline for the coast of Puerto Rico's main island generated to calculate shoreline change rates using the Digital Shoreline Analysis System version 5.1 (ver. 2.0, March 2023) Edition: 2 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: doi:10.5066/P9FNRRN0 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9FNRRN0 Online_Linkage: https://www.sciencebase.gov/catalog/item/6149f9fad34e0df5fb96fc1a Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2021 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: PR_Baselines Source_Contribution: Baselines used by DSAS to cast transects from which shoreline changes can be measured. Process_Step: Process_Description: Explanation of the methods used to calculate shoreline change rates as part of the Puerto Rico shoreline change project. Compiled shorelines and baselines were used to create interim transect files. These transect files were then used, with the shorelines to generate shoreline intersection points and calculate rates of change for both short-term and long-term time periods. This process step and all subsequent process steps were performed by the same person: Rachel E. Henderson VERSION 2 NOTE: The shoreline input file (PR_Shorelines.shp) was found to be missing the 2015 lidar shoreline. This shoreline has been replaced in the version 2 of PR_Shorelines.shp. The following steps do not deviate from the original, but they were re-run in 2022 with the updated shoreline data. Process_Date: 2022 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Rachel E. Henderson Contact_Organization: U.S. Geological Survey Contact_Position: Researcher VII Contact_Address: Address_Type: mailing and physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02540 Contact_Voice_Telephone: 508-548-8700 Contact_Electronic_Mail_Address: rehenderson@contractor.usgs.gov Process_Step: Process_Description: DSAS v5.1 was used to create transect features (stored in a personal geodatabase) to calculate long-term shoreline change. DSAS input parameters Used: shoreline layer = PR_Shorelines, baseline layer= PR_Baseline, baseline group field=DSAS_group, transect spacing=50 meters, search distance=200 meters, land direction=right, shoreline intersection=seaward. Files produced and saved to personal geodatabase = PR_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 v10.6. This process step and all subsequent process steps were performed by the same person: Rachel E. Henderson Source_Used_Citation_Abbreviation: PR_Shorelines Source_Used_Citation_Abbreviation: PR_Baselines Process_Date: 2022 Source_Produced_Citation_Abbreviation: PR_Trans_LT Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Rachel E. Henderson Contact_Organization: U.S. Geological Survey Contact_Position: Researcher VII Contact_Address: Address_Type: mailing and physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02540 Contact_Voice_Telephone: 508-548-8700 Contact_Electronic_Mail_Address: rehenderson@contractor.usgs.gov Process_Step: Process_Description: To calculate the long-term shoreline change rate the entire range of shorelines from 1901 to 2018 were utilized. DSAS generates shoreline intersects and shoreline change calculations stored as rate transects. Depending on the available data, the shoreline intersects used for analysis may include those referenced to the datum-based mean high water (MHW), or a proxy-based feature such as the high water line (HWL) or wet-dry line (WDL). Input parameters used: shoreline layer= PR_Shorelines, shoreline date field=Date_, shoreline uncertainty field name=Uncy, the default accuracy=10 meters, shoreline intersection=seaward, transect layer= PR_Trans_LT, stats calculations=[LRR], shoreline threshold=0, confidence interval=90%. Files produced and saved to personal geodatabase = PR_Trans_LT_rates, PR_Trans_LT_intersects. 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. Source_Used_Citation_Abbreviation: PR_Shorelines Source_Used_Citation_Abbreviation: PR_Trans_LT Process_Date: 2022 Source_Produced_Citation_Abbreviation: PR_Trans_LT_rates Source_Produced_Citation_Abbreviation: PR_Trans_LT_intersects Process_Step: Process_Description: DSAS v5.1 was used to create transect features (stored in a personal geodatabase) to calculate short-term shoreline change. DSAS input parameters Used: shoreline layer = PR_Shorelines, baseline layer= PR_Baseline, baseline group field=DSAS_group, transect spacing=50 meters, search distance=200 meters, land direction=right, shoreline intersection=seaward. Files produced and saved to personal geodatabase = PR_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 v10.6. Source_Used_Citation_Abbreviation: PR_Shorelines Source_Used_Citation_Abbreviation: PR_Baselines Process_Date: 2022 Source_Produced_Citation_Abbreviation: PR_Trans_ST Process_Step: Process_Description: To calculate the short-term shoreline change rates, shorelines from 1977 to 2018 were selected. DSAS generates shoreline intersects and shoreline change calculations stored as rate transects. Depending on the available data, the shoreline intersects used for analysis may include those referenced to the datum-based mean high water (MHW), or a proxy-based feature such as the high water line (HWL) or wet-dry line (WDL). Input parameters used: shoreline layer= PR_Shorelines, shoreline date field=Date_, shoreline uncertainty field name=Uncy, the default accuracy=10 meters, shoreline intersection=seaward, transect layer= PR_Trans_ST, stats calculations=[LRR], shoreline threshold=0, confidence interval=90%. Files produced and saved to personal geodatabase = PR_Trans_ST_rates, PR_Trans_ST_intersects. 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. Source_Used_Citation_Abbreviation: PR_Shorelines Source_Used_Citation_Abbreviation: PR_Trans_ST Process_Date: 2022 Source_Produced_Citation_Abbreviation: PR_Trans_ST_rates Source_Produced_Citation_Abbreviation: PR_Trans_ST_intersects Process_Step: Process_Description: A coastal shoreline classification (Bracero-Marrero and others, 2021) was used to identify areas of sandy shoreline and remove transects/intersects (using basic ArcMap editing tools) from analysis in areas of mangrove vegetation, rocky cliff-backed coastlines, and some areas with significant anthropogenic modification. Process_Date: 2022 Process_Step: Process_Description: FOR PUBLICATION: Long-term and short-term rate transect features were exported from a personal geodatabase to shapefiles in ArcMap v10.6 by right-clicking the transect layer > data > export data. Source_Used_Citation_Abbreviation: PR_Trans_LT_rates Source_Used_Citation_Abbreviation: PR_Trans_ST_rates Process_Date: 2022 Source_Produced_Citation_Abbreviation: PR_Trans_Rates_LT Source_Produced_Citation_Abbreviation: PR_Trans_Rates_ST Process_Step: Process_Description: FOR PUBLICATION: The exported rate transect shapefiles were projected in Esri's ArcToolbox (v10.6) > Data Management Tools > Projections and Transformations > Project. Parameters: input projection - NAD_1983_NSRS2007_StatePlane_Puerto_Rico_Virgin_Isls_FIPS_5200v; output projection - geographic coordinates (WGS84); transformation = none. Process_Date: 2022 Process_Step: Process_Description: FOR PUBLICATION: A field name was added for Municipality, and values were joined based on the Esri dataset "Puerto Rico Municipality Boundaries 2020" https://esri.maps.arcgis.com/home/item.html?id=52bc4062cbac4f5093e18bce4a818b9d In instances where a transect spanned two municipalities, precedence went to the municipality where the shorelnie intersects were located. In instances where a transect did not intersect a municipality, the closest municipality was chosen. Process_Date: 2022 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: 0.0000001 Longitude_Resolution: 0.0000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: PR_Trans_Rates_LT.shp Entity_Type_Definition: Transects were automatically generated by DSAS at a 90-degree angle to the user-specified baseline using a smoothing algorithm to maintain roughly parallel transects that are orthogonal with respect to the baseline. These attributes are for long-term rates for the main island of Puerto Rico. Vector Object Count: 7603 Entity_Type_Definition_Source: U.S. Geological Survey 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: Feature Type. Attribute: Attribute_Label: BaselineID Attribute_Definition: Unique identification number of the baseline segment. If BaselineID=0 no transects will be generated. Used by DSAS to determine transect ordering alongshore if multiple baseline segments exist. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 101 Range_Domain_Maximum: 126 Attribute: Attribute_Label: GroupID Attribute_Definition: This optional field corresponds to the baseline feature attribute "DSAS_Group", and it is a way to aggregate baseline segments (and transects) on the basis of physical variations alongshore (for example, tidal inlets, change in coastal type, or hard stabilization features). Baseline segments are assigned an ID value and statistics are reported by group in the DSAS summary text file once rates are calculated. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 5 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: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 12760 Attribute: Attribute_Label: Azimuth Attribute_Definition: Assigned by DSAS to record the azimuth of the transect measure in degrees clockwise from North. If a transect position has been adjusted during the editing process, the azimuth value in the attribute table is updated automatically. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 360 Attribute_Units_of_Measure: degrees Attribute: Attribute_Label: ShrCount Attribute_Definition: Number of shorelines used to compute shoreline change metrics. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3 Range_Domain_Maximum: 17 Attribute: Attribute_Label: TCD Attribute_Definition: The Total Cumulative Distance (TCD) is the measure in meters along shore from the start of the baseline segment with an ID=1 and measured sequentially alongshore to the end of the final baseline segment. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 642208.17 Attribute: Attribute_Label: LRR Attribute_Definition: A linear regression rate-of-change statistic was calculated by fitting a least-squares regression line to all shoreline points for a particular transect. The best-fit regression line is placed so that the sum of the squared residuals (determined by squaring the offset distance of each data point from the regression line and adding the squared residuals together) is minimized. The linear regression rate is the slope of the line. The rate is reported in meters per year with positive values indicating accretion and negative values indicating erosion. Attribute_Definition_Source: U.S. Geological Survey 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. Reported in meters per year. Attribute: Attribute_Label: LR2 Attribute_Definition: The R-squared statistic, or coefficient of determination, is the proportion of variance in the data that is explained by a regression. It is a dimensionless index that ranges from 1.0 to 0.0 and measures how successfully the best-fit line accounts for variation in the data. The smaller the variability of the residual values around the regression line relative to the overall variability, the better the prediction (and closer the R-squared value is to 1.0). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: LSE Attribute_Definition: This quantity is the standard error of the regression, also known as the standard error of the estimate. To calculate it, the distance between each data point and the regression line is calculated. These distances are squared then summed. The sum is divided by the number of data point minus two. The square root is taken of the result. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Positive decimal values in meters. Attribute: Attribute_Label: LCI90 Attribute_Definition: The standard error of the slope with confidence interval describes the uncertainty of the reported rate. The LRR rates are determined by a best-fit regression line for the shoreline data at each transect. The slope of this line is the reported rate of change (in meters/year). The confidence interval (LCI) is calculated by multiplying the standard error of the slope by the two-tailed test statistic at the user-specified 90 percent confidence. This value is often reported in conjunction with the slope to describe the confidence of the reported rate. For example: LRR = 1.2 LCI90 = 0.7 could be reported as a rate of 1.2 (+/-) 0.7 meters/year. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Positive decimal values in meters. Attribute: Attribute_Label: SHAPE_Leng Attribute_Definition: Length of feature in meter units. Attribute_Definition_Source: Esri Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 18.824421 Range_Domain_Maximum: 432.987692 Attribute: Attribute_Label: MUNICIPAL Attribute_Definition: Municipality names derived from the Esri Living Atlas layer: Puerto Rico Municipality Boundaries 2020. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Municipality name. Detailed_Description: Entity_Type: Entity_Type_Label: PR_Trans_Rates_ST.shp Entity_Type_Definition: Transects were automatically generated by DSAS at a 90-degree angle to the user-specified baseline using a smoothing algorithm to maintain roughly parallel transects that are orthogonal with respect to the baseline. These attributes are for short-term rates for the main island of Puerto Rico. Vector Object Count: 7384 Entity_Type_Definition_Source: U.S. Geological Survey 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: BaselineID Attribute_Definition: Unique identification number of the baseline segment. If BaselineID=0 no transects will be generated. Used by DSAS to determine transect ordering alongshore if multiple baseline segments exist. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 101 Range_Domain_Maximum: 126 Attribute: Attribute_Label: GroupID Attribute_Definition: This optional field corresponds to the baseline attribute "DSAS_Group", and it is a way to aggregate baseline segments (and transects) on the basis of physical variations alongshore (for example, tidal inlets, change in coastal type, or hard stabilization features). Baseline segments are assigned an ID value and statistics are reported by group in the DSAS summary text file once rates are calculated. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 5 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: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 12760 Attribute: Attribute_Label: Azimuth Attribute_Definition: Assigned by DSAS to record the azimuth of the transect measure in degrees clockwise from North. If a transect position has been adjusted during the editing process, the azimuth value in the attribute table is updated automatically. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 360 Attribute_Units_of_Measure: degrees Attribute: Attribute_Label: ShrCount Attribute_Definition: Number of shorelines used to compute shoreline change metrics. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3 Range_Domain_Maximum: 12 Attribute: Attribute_Label: TCD Attribute_Definition: The Total Cumulative Distance (TCD) is the measure in meters along shore from the start of the baseline segment with an ID=1 and measured sequentially alongshore to the end of the final baseline segment. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 642208.17 Attribute: Attribute_Label: LRR Attribute_Definition: A linear regression rate-of-change statistic was calculated by fitting a least-squares regression line to all shoreline points for a particular transect. The best-fit regression line is placed so that the sum of the squared residuals (determined by squaring the offset distance of each data point from the regression line and adding the squared residuals together) is minimized. The linear regression rate is the slope of the line. The rate is reported in meters per year with positive values indicating accretion and negative values indicating erosion. Attribute_Definition_Source: U.S. Geological Survey 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. Reported in meters per year. Attribute: Attribute_Label: LR2 Attribute_Definition: The R-squared statistic, or coefficient of determination, is the proportion of variance in the data that is explained by a regression. It is a dimensionless index that ranges from 1.0 to 0.0 and measures how successfully the best-fit line accounts for variation in the data. The smaller the variability of the residual values around the regression line relative to the overall variability, the better the prediction (and closer the R-squared value is to 1.0). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: LSE Attribute_Definition: This quantity is the standard error of the regression, also known as the standard error of the estimate. To calculate it, the distance between each data point and the regression line is calculated. These distances are squared then summed. The sum is divided by the number of data point minus two. The square root is taken of the result. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Positive decimal values in meters. Attribute: Attribute_Label: LCI90 Attribute_Definition: The standard error of the slope with confidence interval describes the uncertainty of the reported rate. The LRR rates are determined by a best-fit regression line for the shoreline data at each transect. The slope of this line is the reported rate of change (in meters/year). The confidence interval (LCI) is calculated by multiplying the standard error of the slope by the two-tailed test statistic at the user-specified 90 percent confidence. This value is often reported in conjunction with the slope to describe the confidence of the reported rate. For example: LRR = 1.2 LCI90 = 0.7 could be reported as a rate of 1.2 (+/-) 0.7 meters/year. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Positive decimal values in meters. Attribute: Attribute_Label: SHAPE_Leng Attribute_Definition: Length of feature in meter units Attribute_Definition_Source: Esri Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 18.824421 Range_Domain_Maximum: 432.987692 Attribute: Attribute_Label: MUNICIPAL Attribute_Definition: Municipality names derived from the Esri Living Atlas layer: Puerto Rico Municipality Boundaries 2020. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Municipality name. Overview_Description: Entity_and_Attribute_Overview: The entity and attribute information provided here describes the tabular data associated with long-term (~120 years) and short-term ~40 years) shoreline change rates. Please review the individual attribute descriptions for detailed information. All calculations for length are in meter units. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing and physical address Address: Federal Center, Building 810, MS 302 City: Denver State_or_Province: CO Postal_Code: 880225 Country: USA Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: The dataset contains the polyline rates of shoreline change data, (PR_Trans_Rates_LT.shp, PR_Trans_Rates_ST.shp and other shapefile components), browse graphic, and the FGDC CSDGM metadata. 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 10.6 Format_Specification: Esri polyline shapefile Format_Information_Content: These files (.cpg, .dbf, .prj, .sbn, .sbx, .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. Additional files of the same name included are a .lyr file (used to display symbology) and FGDC CSDGM-compliant metadata in XML format. File_Decompression_Technique: no compression applied Transfer_Size: 0.56 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P9FNRRN0 Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/6149fa12d34e0df5fb96fc1c Network_Resource_Name: https://www.sciencebase.gov/catalog/item/6149fa12d34e0df5fb96fc1c Access_Instructions: The first link is to the USGS publication page, the second link downloads all the data on the landing page, and the third link is to the dataset 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: 20230303 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Rachel E. Henderson 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 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address in the event the person is no longer with USGS. Metadata_Standard_Name: Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time