Metadata: Identification_Information: Citation: Citation_Information: Originator: Maritza Barreto-Orta Originator: Laura Martí Originator: Leticia Silva Originator: Tatiana Gladkikh Originator: Zulimar Alvira Originator: Nias Hernández-Montcourt Originator: Rubén Maldonado-González Originator: Loderay Bracero-Marrero Originator: Emily A. Himmelstoss Publication_Date: 20211117 Title: 1970s Shorelines for the Main Island of Puerto Rico Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9SEUAHC 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/P9SEUAHC Online_Linkage: https://www.sciencebase.gov/catalog/item/610c20d1d34ef8d705698348 Larger_Work_Citation: 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: 20211130 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 Description: Abstract: The U.S. Geological Survey (USGS) maintains shoreline positions for the United States coasts from both older sources, such as aerial photos or topographic surveys, as well as contemporary sources like lidar point clouds and digital elevation models (DEMs). These shorelines are compiled and analyzed in the Digital Shoreline Analysis System (DSAS) software to compute rates of change. It is useful to keep a record of historical shoreline positions as a method of monitoring change over time 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 United States Geological Survey (USGS) in cooperation with the Coastal Research and Planning Institute of Puerto Rico (CoRePI, 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 shorelines are used to measure the rate of shoreline change over time. Purpose: The shoreline data in this data release were digitized from georeferenced photographs, using the high-water line, ground water exit point, wet-dry line and instantaneous water line as specified in the shoreline type description of the data and attribute section of the metadata. This data release also provides a detailed classification of the coast from aerial photo interpretations. These data are used in conjunction with other compiled shorelines provided in complementary data releases to calculate rates of shoreline change. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19640101 Ending_Date: 19770101 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -67.2715 East_Bounding_Coordinate: -65.5900 North_Bounding_Coordinate: 18.5159 South_Bounding_Coordinate: 17.9272 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: oceans Theme_Keyword: environment Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: coastal processes Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: UPR 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_Keyword: USGS Theme_Keyword: U.S. Geological Survey Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: DSAS Theme_Keyword: Digital Shoreline Analysis System Theme_Keyword: Shoreline Theme_Keyword: Historical Shorelines Theme_Keyword: Shoreline Change Theme_Keyword: Shoreline Classification Theme_Keyword: Wet/Dry Line Theme_Keyword: WDL Theme_Keyword: Groundwater Exit Theme_Keyword: Aerial Photos Theme_Keyword: Hurricane Maria Theme_Keyword: Hurricane Irma Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:610c20d1d34ef8d705698348 Place: Place_Keyword_Thesaurus: None Place_Keyword: United States Place_Keyword: Atlantic Coast Place_Keyword: Caribbean Place_Keyword: Puerto Rico Access_Constraints: None. Use_Constraints: Users must be aware of metadata accuracy conditions and bear responsibility for the appropriate use of the information with respect to possible errors, scale, resolution, rectification, positional accuracy, development methodology, time period, environmental and climatic conditions and other circumstances specific to these data. The user should refer to the accompanying metadata notes for a description of the data and data development procedures. The data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided "as is" without warranty of any kind, either expressed or implied, or statutory, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Please, recognize the Coastal Research and Planning Institute of Puerto Rico (CoRePI-PR), Graduate School of Planning, University of Puerto Rico (UPR), as the originator. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Maritza Barreto-Orta Contact_Organization: Coastal Research and Planning Institute of Puerto Rico (CoRePI-PR), Graduate School of Planning, UPR-RP Contact_Position: Principal Investigator Contact_Address: Address_Type: mailing and physical Address: Station 1001 City: San Juan State_or_Province: Puerto Rico Postal_Code: 00925 Country: Puerto Rico Contact_Voice_Telephone: 787764000, ext. 85118 or 85119 Contact_Electronic_Mail_Address: maritza.barreto@upr.edu; coastal.planning@upr.edu Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/610c20d1d34ef8d705698348?name=PR_1970_MainIsland_Shoreline_Classification.jpg Browse_Graphic_File_Description: Map view of data Browse_Graphic_File_Type: JPEG Data_Set_Credit: "Shoreline mapping, change estimation and forecasting for the coast of Puerto Rico impacted by Hurricanes Irma and Maria" Grant awarded to the Graduate School of Planning, University of Puerto Rico, Rio Piedras Campus (UPR-RP) by the Woods Hole Coastal and Marine Science Center of the United States Geological Survey (USGS). Maritza Barreto-Orta, Principal Investigator, Graduate School of Planning; Loderay I.M. Bracero-Marrero, Research Assistant Lead Nias Hernández-Montcourt, Research Assistant; Rubén O. Maldonado-González, Research Assistant. Woods Hole Coastal and Marine Science Center, USGS: Emily Himmelstoss, Project Manager; Rachel Henderson, Researcher IV; Julia Heslin, Geographer. Native_Data_Set_Environment: Esri ArcGIS Desktop 10.7.1 Cross_Reference: Citation_Information: Originator: Maritza Barreto-Orta Originator: Orlando Santaella Originator: Leticia Silva Originator: Tatiana Gladkikh Originator: Zulimar Alvira Originator: Laura Martí Originator: Alejandro Reyes Originator: Dariel Narvaéz Originator: Nahir Cabrera Originator: Elizabeth Díaz Publication_Date: 20170131 Title: Assessment of beach morphology at Puerto Rico Island Geospatial_Data_Presentation_Form: publication Publication_Information: Publication_Place: San Juan, Puerto Rico Publisher: Puerto Rico and Caribbean Beach Network, Planning School, University of Puerto Rico Rio Piedras Campus Online_Linkage: https://www.drna.pr.gov/wp-content/uploads/2017/05/Geomorphic-Assessment-of-Puerto-Rico-1977-to-2016.pdf Cross_Reference: Citation_Information: Originator: Elizabeth H. Boak Originator: Ian L. Turner Publication_Date: 2005 Title: Shoreline Definition and Detection: A Review Geospatial_Data_Presentation_Form: publication Series_Information: Series_Name: Journal of Coastal Research Issue_Identification: Vol. 214 Publication_Information: Publication_Place: West Palm Beach, FL, USA Publisher: Coastal Education and Research Foundation Online_Linkage: https://bioone.org/journals/journal-of-coastal-research/volume-2005/issue-214/03-0071.1/Shoreline-Definition-and-Detection-A-Review/10.2112/03-0071.1.full Cross_Reference: Citation_Information: Originator: P.D. Komar Publication_Date: 1998 Title: Beach Processes and Sedimentation Geospatial_Data_Presentation_Form: publication Publication_Information: Publication_Place: Upper Saddle River, NJ, USA Publisher: Prentice-Hall Cross_Reference: Citation_Information: Originator: Julia L. Heslin Originator: Rachel E. Henderson Originator: Emily A. Himmelstoss Publication_Date: 20211130 Title: Historical Shorelines for Puerto Rico from 1901 to 1987 Geospatial_Data_Presentation_Form: publication 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://www.sciencebase.gov/catalog/item/60cb7627d34e86b938a3a1b0 Cross_Reference: Citation_Information: Originator: Julia L. Heslin Originator: Rachel E. Henderson Originator: Emily A. Himmelstoss Publication_Date: 20211130 Title: A GIS Compilation of Vector Shorelines for Puerto Rico from 2015 to 2018 Geospatial_Data_Presentation_Form: publication 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://www.sciencebase.gov/catalog/item/610abe37d34ef8d70568937a Cross_Reference: Citation_Information: Originator: Rachel E. Henderson Originator: Julia L. Heslin Originator: Emily A. Himmelstoss Publication_Date: 20211130 Title: Puerto Rico Shoreline Change: A GIS Compilation of Shorelines, Baselines, Intersects, and Change Rates using the Digital Shoreline Analysis System version 5.1 Geospatial_Data_Presentation_Form: publication 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://www.sciencebase.gov/catalog/item/61255b87d34e40dd9c03f390 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Quality Control (QC) was conducted with the principal investigator and the research assistants. The lines were revised and reclassified, if needed, by the research assistants. Logical_Consistency_Report: Topology rules were tested for each feature class polyline. No additional digitizations were made from the previous shoreline. Only topology errors were corrected. Topology rules: Must Not Overlap (Line) Must Not Intersect (Line) Must Not have Dangles (Line) Must Not Self Overlap (Line) Must Not Self Intersect (Line) Completeness_Report: This shoreline includes the shoreline feature for Puerto Rico Main Island. It does not include Vieques and Culebra municipalities. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: For the 1970 shoreline, we accounted for the following errors in meters: 1) Georeferencing (RMSE): 4.00; 2) Digitizing error: 2.00; 3) Uncertainty HWL: 3.00. We calculated the total error by: first, squaring each of the errors, summing all of the squared errors, and finally, taking the square root of the sum. The total horizontal error for this shoreline is 5.4 meters. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Photogrammetry Office, Puerto Rico Highway Authority Publication_Date: 2020 Title: Puerto Rico Main Island Rectified Aerial Images (1964, 1971, 1973 ,1977) collected from the Photogrammetry Office, Puerto Rico Highway Authority Geospatial_Data_Presentation_Form: raster digital data Online_Linkage: Not available Type_of_Source_Media: Digital Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19640101 Ending_Date: 19770101 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Aerial Images Puerto Rico Main Island Source_Contribution: These images were used to digitize the shoreline proxies and other shoreline features Process_Step: Process_Description: Shoreline Change Digitization Process The following step outlines the process from a previous effort. The shoreline derived from 1970s aerial images was digitized in a previous project sponsored by the National Oceanic and Atmospheric Administration (NOAA) through the Coastal Zone Management Division at Puerto Rico Natural Resources Department (DRNA) (Contract Number 2015-000101 Assessment of beach morphology at Puerto Rico Island). The images were purchased from the Puerto Rico Highways & Transportation Authority Photogrammetry Office. Aerial photos taken from 1964 to 1977 were used to create the shoreline of Puerto Rico for 1970s period. The approximate percentage of shoreline extracted by date was the following--> 1977 (56% approx.), 1973 (10%), 1971 (33% approx.), and 1964 (1%). Therefore, most of the shoreline was extracted from 1977 and 1971. The digitization process was divided into four main sections: PR northeast, PR northwest, PR-southwest, and PR-southeast. In ArcPro, a new file geodatabase was created, followed by a feature dataset. In the feature dataset, an empty line feature class was created for digitizing the shoreline. The aerial photo was digitized at the 1:1000 scale. The digitization began at the extreme southeastern point of the photo, moving counterclockwise towards the northwestern point. The principal objective of the digitization exercise was to identify and draw the wet/dry line; the instantaneous water line on the aerial photo was used as a reference. Following shoreline definitions developed by Boak and Turner (2005), the next seaward line after the instantaneous water line was identified as the “groundwater exit point”, and the second line was identified as the “wet/dry line”. The priority was to identify and draw the wet/dry line; when that line was not visible, a groundwater exit point was drawn. In some cases, mainly located on the south coast of the Island, it was hard to identify the wet/dry line due to the brightness of the image and/or the coastal geomorphic configuration. The main reasons for insufficient visibility in aerial photos were the shadows, trees, and brightness in the image. Additionally, problems with poor raster resolution, overlapping of images that did not always align, and difficulty in identifying the wet/dry or groundwater line. Also, geometrically corrected images from the 1970s did not always align with orthophotos of 2010. Source_Used_Citation_Abbreviation: Aerial Images Puerto Rico Main Island Process_Date: 20160501 Source_Produced_Citation_Abbreviation: Preliminary Shoreline Main Island 1970 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Orlando Santaella Contact_Organization: Coastal Research and Planning Institute of Puerto Rico (CoRePI-PR), Graduate School of Planning, UPR-RP. Contact_Position: Research Assistant Lead Contact_Address: Address_Type: mailing and physical Address: Station 1001 City: San Juan State_or_Province: Puerto Rico Postal_Code: 00925 Country: Puerto Rico Contact_Voice_Telephone: 787-764-0000 ext. 85118 or 85119 Contact_Electronic_Mail_Address: coastal.planning@upr.edu Process_Step: Process_Description: The scheme of the 1970s shoreline, from now on referred to as the "1970s NOAA shoreline," was standardized to match the new scheme created for the present project: "Shoreline mapping, change estimation and forecasting for the coast of Puerto Rico impacted by Hurricanes Irma and Maria." The 1970s NOAA shoreline classification scheme was reclassified to match the current project scheme. An ArcGIS Pro Python Notebook and a stand-alone script in Python 2.5 were used to streamline the process. This previous classification was reclassified using the subtypes and domains in this project: None--> NO VISIBILITY Non-Identified--> NO VISIBILITY, OTHER Rocky Coast--> ROCKY, BARE LAND River Mouth--> NO VISIBILITY Vegetation--> VEGETATION, Man-Made Structure--> ANTHROPOGENIC Wet/Dry Line--> BEACH, WET/DRY LINE OR RUN UP MAXIMA Groundwater Exit Point--> BEACH, GROUNDWATER EXIT POINT Eolianite--> ROCKY, BARE LAND Beach Rock--> ROCKY, BARE LAND After the shoreline was reclassified to this new scheme, topology rules were run to correct errors. This feature polyline was corrected to avoid overlapping of the lines, repeated features or intersections. However, this feature polyline is not a continuous line. Gaps can be found along the line. Source_Used_Citation_Abbreviation: Preliminary Shoreline Main Island 1970 Process_Date: 20210525 Source_Produced_Citation_Abbreviation: Shoreline Main Island 1970 feature class Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Loderay Bracero Marrero Contact_Organization: Coastal Research and Planning Institute of Puerto Rico (CoRePI-PR), Graduate School of Planning, UPR-RP. Contact_Position: Research Assistant Lead Contact_Address: Address_Type: mailing and physical Address: Station 1001 City: San Juan State_or_Province: Puerto Rico Postal_Code: 00925 Country: Puerto Rico Contact_Voice_Telephone: 787-764-0000 ext. 85118 or 85119 Contact_Electronic_Mail_Address: loderay.bracero@upr.edu; coastal.planning@upr.edu Process_Step: Process_Description: The geodatabase was transferred to USGS for final processing steps. The geodatabase feature class was exported as a shapefile (ArcToolbox >> Conversion >> To Shapefile >> Feature Class to Shapefile (multiple)), ensuring that the "Transfer field domain descriptions" was checked in the Environment Settings. A YEAR field was added and calculated based on the IMG_DATE field so shorelines could be easily grouped by year. Finally, the shapefile was projected (ArcToolbox >> Data Management >> Projections and Transformations >> Project) to WGS 1984 using the Puerto_Rico_To_NAD_1983 + Puerto_Rico_to_WGS_1984_4 geographic transformation. Source_Used_Citation_Abbreviation: Shoreline Main Island 1970 feature class Process_Date: 2021 Source_Produced_Citation_Abbreviation: Shoreline_Puerto_Rico_Main_Island_1970.shp Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Julia L. Heslin Contact_Organization: U.S. Geological Survey, Woods Hole Coastal and Marine Science Center Contact_Position: Geographer 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: 508-457-2262 Contact_Electronic_Mail_Address: jheslin@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 1680 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0198254329 Longitude_Resolution: 0.0207101049 Geographic_Coordinate_Units: Decimal seconds Geodetic_Model: Horizontal_Datum_Name: WGS_1984 Ellipsoid_Name: WGS_84 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Shoreline_Puerto_Rico_1970_Main_Island.shp Entity_Type_Definition: Table containing attribute information associated with the dataset. Entity_Type_Definition_Source: Producer Defined Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: USER Attribute_Definition: Person who digitized the line section. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tatiana Gladkikh Enumerated_Domain_Value_Definition: Character string of length 254 Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Leticia Silva Enumerated_Domain_Value_Definition: Character string of length 254 Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Laura Martí Enumerated_Domain_Value_Definition: Character string of length 254 Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Zulimar Alvira Enumerated_Domain_Value_Definition: Character string of length 254 Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: SHORE_TYPE Attribute_Definition: The shoreline general type. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: BEACH Enumerated_Domain_Value_Definition: Unconsolidated sediment deposit (sand and gravel) (Komar, 1998). Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ROCKY Enumerated_Domain_Value_Definition: Rocky features including rocky outcrop (volcanic/sedimentary and/or metamorphic), eolinite and/or beach rock formations. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: VEGETATION Enumerated_Domain_Value_Definition: Shoreline type that includes wetlands such as mangrove, forests, pasture, and other vegetation. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ANTHROPOGENIC Enumerated_Domain_Value_Definition: Any type of anthropogenic structure on the coast. This may range from small to large structures. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NO VISIBILITY Enumerated_Domain_Value_Definition: Areas where the classification was not possible to perform. Example: presence of clouds. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: SHORE_DESC Attribute_Definition: A more detailed classification of the coast. In this field, the shoreline proxies are identified. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: WET/DRY LINE OR RUN UP MAXIMA Enumerated_Domain_Value_Definition: The line between the dry and wet zones behind the High Water Line (HWL). Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: GROUNDWATER EXIT Enumerated_Domain_Value_Definition: Darker area created after the wave has broken and returns to the water. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: INSTANTANEOUS LINE Enumerated_Domain_Value_Definition: Where a wave breaks; often observed as a foaming mass of water. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: BARE LAND Enumerated_Domain_Value_Definition: Exposed rock, inland or on the coastline with little or no vegetation cover, and with a low slope. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: OTHER Enumerated_Domain_Value_Definition: Any type of classification that was not identified. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: IMG_REF Attribute_Definition: Images used to digitize the shoreline. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Aerial Images Main Island 1964, 1971, 1973, 1977 Enumerated_Domain_Value_Definition: Years when aerial photo survey was conducted. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: IMG_DATE Attribute_Definition: Date of the images used in this study. A month and day of January 1 was assigned for all images since no exact date was available. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 01/01/1964 Range_Domain_Maximum: 01/01/1977 Attribute: Attribute_Label: AREA_COV Attribute_Definition: Geographical area that features line. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Main Island Enumerated_Domain_Value_Definition: Main Island of Puerto Rico covering 76 municipalities Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: UNCY Attribute_Definition: Uncertainty value for the shoreline derived from the Georeferencing error (RMSE), the digitization error, and HWL position error. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5.4 Range_Domain_Maximum: 5.4 Attribute: Attribute_Label: YEAR Attribute_Definition: The year of the shoreline taken from the IMG_DATE field. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1964 Range_Domain_Maximum: 1977 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing and physical 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 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 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: Shapefile Format_Version_Number: ArcGIS 10.7 Format_Specification: ESRI Polyline Shapefile Format_Information_Content: Dataset contains the shapefile, browse graphic, and CSDGM metadata. Transfer_Size: 4.0 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P9SEUAHC Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/610c20d1d34ef8d705698348 Network_Resource_Name: https://www.sciencebase.gov/catalog/item/610c20d1d34ef8d705698348 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: N/A Metadata_Reference_Information: Metadata_Date: 20211117 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Julia L. Heslin Contact_Organization: U.S. Geological Survey, Woods Hole Coastal and Marine Science Center Contact_Position: Geographer 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: 508-457-2262 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: jheslin@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998