These data were generated using DSAS, an automated software program, which does not perform checks for fidelity of the input features. Following generation of the rates and intersects by the DSAS software a visual inspection of the intersects was performed in map view to determine that no unwanted measurements were included in the desired (long- or short-term) shoreline change analysis.
This dataset contains the shoreline intersect positions generated by the DSAS software application that were used to calculate shoreline change rates for the region. Additional intersect positions and rate transects may have been generated but did not meet the required number of shorelines or time period requirements.
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:
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
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: 2022
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:
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
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: After publication (November 19, 2021), 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 run again in 2022 with the updated shoreline data.
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@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
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@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.
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 intersect 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_intersects
Source_Used_Citation_Abbreviation: PR_Trans_ST_intersects
Process_Date: 2022
Source_Produced_Citation_Abbreviation: PR_Intersects_LT
Source_Produced_Citation_Abbreviation: PR_Intersects_ST
Process_Step:
Process_Description:
FOR PUBLICATION: The exported intersect 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:
The metadata was modified to add the Data Report cross-reference and the distribution liability was updated to the current standards (20240513).
Process_Date: 2024
