Shoreline change rates for the islands of Vieques and Culebra, Puerto Rico, calculated using the Digital Shoreline Analysis System version 5.1

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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 islands of Vieques and Culebra, Puerto Rico, calculated using the Digital Shoreline Analysis System version 5.1
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/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/6149fa53d34e0df5fb96fc26
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
Edition: 1.0
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: 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 for the islands Vieques and Culebra, of Puerto Rico.. 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.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1936
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:6149fa53d34e0df5fb96fc26
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Atlantic Coast
Place_Keyword: United States
Place_Keyword: Caribbean
Place_Keyword: Puerto Rico
Place_Keyword: Vieques
Place_Keyword: Culebra
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@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name:
https://www.sciencebase.gov/catalog/file/get/6149fa53d34e0df5fb96fc26?name=VC_ShorelineChange_Rates.jpg
Browse_Graphic_File_Description:
Map of shoreline change rates (long-term) for the islands Vieques and Culebra 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: 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: 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
Cross_Reference:
Citation_Information:
Originator: Rachel E. Henderson
Originator: Julia L. Heslin
Originator: Emily A. Himmelstoss
Originator: Maritza Barreto-Orta
Publication_Date: 2024
Title:
National Shoreline Change—Summary Statistics for Vector Shorelines from the Early 1900s to the 2010s for Puerto Rico
Series_Information:
Series_Name: Data Report
Issue_Identification: 1191
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.3133/dr1191
Other_Citation_Details:
Henderson, R.E., Heslin, J.L., Himmelstoss, E.A., and Barreto-Orta, M., 2024, National shoreline change—Summary statistics for vector shorelines from the early 1900s to the 2010s for Puerto Rico: U.S. Geological Survey Data Report 1191, 41 p., https://doi.org/10.3133/dr1191.
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 an individual transect intersected 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.
Edition: 1
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 islands of Vieques and Culebra, Puerto Rico, generated to calculate shoreline change rates using the Digital Shoreline Analysis System version 5.1.
Edition: 1
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: data release
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/6149fa46d34e0df5fb96fc24
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: VC_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 basleines were used to create interrim transect files. These transect files were then used, with the shorelines to generate shoreline intersection points and rates of change for both short-term and long-term.
This process step and all subsequent process steps were performed by the same person: Rachel E. Henderson
Process_Date: 2021
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) for long-term shoreline change. DSAS input parameters Used: shoreline layer = PR_Shorelines, baseline layer= VC_Baselines, 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 = VC_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: VC_Baselines
Process_Date: 2021
Source_Produced_Citation_Abbreviation: VC_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:
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) 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= VC_Trans_LT, stats calculations=[LRR], shoreline threshold=0, confidence interval=90%. Files produced and saved to personal geodatabase = VC_Trans_LT_rates, VC_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: VC_Trans_LT
Process_Date: 2021
Source_Produced_Citation_Abbreviation: VC_Trans_LT_rates
Source_Produced_Citation_Abbreviation: VC_Trans_LT_intersects
Process_Step:
Process_Description:
DSAS v5.1 was used to create transect features (stored in a personal geodatabase) for short-term shoreline change. DSAS input parameters Used: shoreline layer = PR_Shorelines, baseline layer= VC_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 = VC_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: VC_Baselines
Process_Date: 2021
Source_Produced_Citation_Abbreviation: VC_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) 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= VC_Trans_ST, stats calculations=[LRR], shoreline threshold=0, confidence interval=90%. Files produced and saved to personal geodatabase = VC_Trans_ST_rates, VC_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: VC_Trans_ST
Process_Date: 2021
Source_Produced_Citation_Abbreviation: VC_Trans_ST_rates
Source_Produced_Citation_Abbreviation: VC_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 transcets/intersects from analysis in areas of mangrove vegetation, rocky cliff-backed coastlines, and some areas with significant anthropogenic modification.
Process_Date: 2021
Process_Step:
Process_Description:
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: VC_Trans_LT_rates
Source_Used_Citation_Abbreviation: VC_Trans_ST_rates
Process_Date: 2021
Source_Produced_Citation_Abbreviation: VC_Trans_Rates_LT
Source_Produced_Citation_Abbreviation: VC_Trans_Rates_ST
Process_Step:
Process_Description:
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: 2021
Process_Step:
Process_Description:
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
Process_Date: 2021
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
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: VC_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 Vieques and Culebra of Puerto Rico. Vector Object Count: 1881
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: 1
Range_Domain_Maximum: 8
Attribute:
Attribute_Label: GroupID
Attribute_Definition:
This optional field corresponds to the Basleine file "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 repored 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: 3
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: 10
Range_Domain_Maximum: 3563
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: 5
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: 450
Range_Domain_Maximum: 220055.04
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: 10.280592
Range_Domain_Maximum: 184.753724
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: VC_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 Vieqeus and Culebra of Puerto Rico. Vector Object Count: 1432
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: 1
Range_Domain_Maximum: 8
Attribute:
Attribute_Label: GroupID
Attribute_Definition:
This optional field corresponds to the Basleine file "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 repored 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: 3
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: 10
Range_Domain_Maximum: 3563
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: 3
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: 450
Range_Domain_Maximum: 220055.04
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: 10.280592
Range_Domain_Maximum: 120.424848
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, (SHP and other shapefile components), browse graphic, and the FGDC CSDGM metadata.
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 for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (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.
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 HTML 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/6149fa53d34e0df5fb96fc26
Network_Resource_Name:
https://www.sciencebase.gov/catalog/item/6149fa53d34e0df5fb96fc26
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: 20240513
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: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_P9FNRRN0/VC_Trans_Rates_metadata.html>
Generated by mp version 2.9.51 on Wed May 15 09:56:03 2024