E.R. Thieler
2007
Historic shoreline positions for Rincon, Puerto Rico 1936-2006 (shorelines.shp)
1.0
vector digital data
Open-File Report
2007-1017
Woods Hole Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.3133/ofr20071017
http://pubs.usgs.gov/of/2007/1017/data/shapefiles/shorelines.zip
http://pubs.usgs.gov/of/2007/1017/htmldocs/data_catalog.html
E.R. Thieler
R.W. Rodriguez
E.A. Himmelstoss
2007
Historical Shoreline Changes at Rincon, Puerto Rico, 1936-2005
1.0
Open-File Report
2007-1017
Woods Hole Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.3133/ofr20071017
http://pubs.usgs.gov/of/2007/1017/
The 8 km of shoreline from Punta Higüero to Punta Cadena in Rincón, Puerto Rico is experiencing long-term coastal erosion. This study documents historical shoreline changes at Rincón for the period 1936-2005. Twelve historical shoreline positions were compiled from existing data, new orthophotography, and GPS field surveys. Shoreline vectors represent the high water line at the time of the survey.
The historic shorelines were compiled for use in the Digital Shoreline Analysis System (DSAS) ArcGIS extension. DSAS reports various rate of change statistics based on transect-shoreline intersections cast at 50 meter spacing alongshore from Punta Higuero to Punta Cadena.
19360208
20051206
ground condition
None planned
-67.271440
-67.225821
18.364635
18.296929
USGS Metadata Identifier
USGS:31458583-f0e7-428d-bbc2-389830a4339e
None
historic shoreline
shoreline change rate
weighted linear regression rate
endpoint rate
baseline
beach erosion
beach nourishment
LIDAR
aerial photographs
GPS survey
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Woods Hole Science Center
WHSC
ISO 19115 Topic Category
oceans
geoscientificInformation
USGS Thesaurus
coastal processes
marine geology
geospatial datasets
None
Puerto Rico
Rincon
Punta Higuero
Punta Cadena
Antilles
Carribbean
None
Public domain data are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey (USGS) must be referenced as the originator of the dataset in any future products or research derived from these data.
Public domain data are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey (USGS) must be referenced as the originator of the dataset in any future products or research derived from these data.
E.R. Thieler
U.S. Geological Survey
Research Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2350
508-457-2310
rthieler@usgs.gov
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
E.R. Thieler
R.W. Rodriguez
M. Carlo
1995
Beach Erosion and Coastal Development at Rincon, Puerto Rico
Shore and Beach
v. 63, n. 4, pp. 18-28.
Berkeley, CA
American Shore and Beach Preservation Association
E.R. Thieler
M. Carlo
1995
Historical Shoreline Changes at Rincon, Puerto Rico
Open-File Report
95-0072
Woods Hole Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
There is significant agreement of linework between adjacent shorelines digitized from adjacent aerial photographs. No additional checks for topological consistency were performed on shoreline positions collected from GPS field surveys.
The data set is complete inasmuch as it covers the extent of the study area along the coast of Rincon, Puerto Rico and there are no plans for further modification of the data.
Approximate horizontal accuracy is 3 meters or better.
3
Stable reference features were used to create a ground control network for aerial photographs. Points were located in the field using a differential Global Positioning System (GPS) receiver. The GPS field surveys also used differential GPS to mark shoreline positions. All shoreline positions therefore have a positioning accuracy of 3 meters.
This process step describes the methods used to digitize shoreline positions for the following years: 1963, 1971, 1974, 1977, 1987 and 1989. Seven sets of near-vertical, overlapping aerial photographs were used to obtain historical shoreline positions. The data included sets of photography from 1950 as well but was discarded after determining that the original input data were flawed. All have a nominal scale of 1:20,000, were flown during winter months, and except the 1987 set which used natural color film, were taken in black and white.
A ground control network for the air photos was developed by identifying a number of common features on most or all of the photograph sets. Stable reference features such as buildings and road intersections were identified and their approximate locations marked on a U.S. Geological Survey (USGS) 7.5-minute topographic map. The points were then precisely located in the field and a more specific, stable target (e.g., a building comer, sidewalk, etc.) identifiable on the photographs was surveyed using a differential Global Positioning System (GPS) receiver. The points used in this study are accurate horizontally within 3 m and vertically to within about 6 m.
Once the basic control network was established, a suite of pass points (common points appearing on two or more photos for which precise geographic information is unknown) was identified to provide further relative control for the photos within each time series. To provide a very "tight" control network and permit greater photogrammetric accuracy, the photo sets for each date included frames that were well inland from the shoreline.
The air photos were digitized using a 12x lighted magnifying loupe to aid in identification of the fiducial reference marks around the photo border, ground control points, pass points, and the shoreline. The wet/dry line on the beach, the reference feature used in the field surveys described below, was used to delineate the shoreline in each photo. The wet/dry line is the most frequently used shoreline for digitizing because it is easily identified by the tonal difference between wet and dry sand. Where available, camera system calibration data were used to correct the photographs for film distortion and assess the magnitude of lens distortion.
The National Ocean Service's General Integrated Analytical Triangulation (GIANT) aerotriangulation program was used to solve simultaneously for the camera position and angular orientation parameters for the air photos. GIANT was also used to remove atmospheric refraction effects from the aerotriangulation solution. Statistical output from GIANT indicated an accuracy of +4 m for the air photo-derived shoreline locations.
The camera parameters for each photo were used to compute a single-ray intersection solution for the digitized shoreline points. A geographic coordinate system based on the WGS84 ellipsoid was used in shoreline position calculations for consistency with the GPS control point surveys and the field shoreline surveys. The output shoreline position data files for each photo were imported into separate overlays (one for each year of photography) in Maplnfo TM, a Macintosh®-based Geographic Information System (GIS), and joined to adjacent photo data to form a continuous shoreline.
unknown
E.R. Thieler
U.S. Geological Survey
Research Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2350
508-457-2310
rthieler@usgs.gov
This process step describes the methods used to digitize shoreline positions for the following years: 1936, 1983, and 1987. Aerial photographs were scanned into digital format (.tif) at 600 dpi. The 2004 True Color Orthoimages (U.S. Army Corps of Engineers) were used as a reference for the creation of Ground Control Points (GCPs) to geometrically correct all aerial photographs. No RMS error greater than 0.03 was used. A Direct Linear Transform (DLT) model was utilized. All photographs were re-sampled to 1-meter pixel resolution using nearest neighbor re-sampling. Three image mosaics, one for each survey year, were created (1936, 1983 and 1987). Cutlines were manually created following general linear features. Areas of overlap were feathered by a distance of 10-meters. All images were histogram matched to decrease variability between images
unknown
E.R. Thieler
U.S. Geological Survey
Research Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2350
508-457-2310
rthieler@usgs.gov
This process step describes the methods used to digitize shoreline positions for the following years: 1994, 2005 and 2006. Field surveys of wet/dry shoreline positions were conducted on 24 August 1994, 06 December 2005, and 05-06 December 2006. These surveys utilized a backpack-mounted GPS receiver logging positions at 5- second intervals as the backpacker walked along the wet/dry line. The wet/dry line is the most frequently used shoreline for digitizing because it is easily identified by the tonal difference between wet and dry sand. The data were differentially corrected in real-time in the field. Further post-processing yielded a positioning accuracy of 2-3 m. The GPS data were imported directly into the GIS for display with the shorelines obtained from the photographs.
unknown
E.R. Thieler
U.S. Geological Survey
Research Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2350
508-457-2310
rthieler@usgs.gov
The final shoreline file for each year was coded with 6 attribute fields (ID, Type, Date, Descr, Source, and Accuracy) required for the Digital Shoreline Analysis System (DSAS), which was used to calculate shoreline change rates.
unknown
E.R. Thieler
U.S. Geological Survey
Research Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2350
508-457-2310
rthieler@usgs.gov
The shapefile was projected to Geographic Coordinates.
unknown
Emily Himmelstoss
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2262
508-457-2310
ehimmelstoss@usgs.gov
The metadata was edited to remove errors as well as update some information. Edits include updating the citation section with the DOI link and a slight modification to the dataset title, added the USGS Thesaurus, added keywords section with USGS persistent identifier as theme keyword, replaced distribution liability with FSP statement. Other unrequired blank fields were deleted, duplicate entries within a field were deleted, required empty elements were fixed with “information unavailable from original metadata”. The metadata date (20070222), but not the contact (except email and contact instructions) was updated. The metadata available from a harvester may supersede metadata available from the publication. Compare the metadata dates to determine which metadata file is most recent. The metadata available from a harvester may supersede metadata available from the publication. Compare the metadata dates to determine which metadata file is most recent.
20210831
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Vector
String
16
0.000001
0.000001
Decimal degrees
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
shorelines
information not available from original metadata
information not available from original metadata
FID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
ESRI
Coordinates defining the features.
date_
Year of survey
U.S. Geological Survey
02/08/1936
Feature surveyed in 1936
U.S. Geological Survey
11/25/1950
Feature surveyed in 1950
U.S. Geological Survey
02/21/1963
Feature surveyed in 1963
U.S. Geological Survey
03/30/1971
Feature surveyed in 1971
U.S. Geological Survey
10/03/1974
Feature surveyed in 1974
U.S. Geological Survey
01/26/1977
Feature surveyed in 1977
U.S. Geological Survey
03/15/1983
Feature surveyed in 1983
U.S. Geological Survey
01/18/1987
Feature surveyed in 1987
U.S. Geological Survey
04/13/1989
Feature surveyed in 1989
U.S. Geological Survey
08/24/1994
Feature surveyed in 1994
U.S. Geological Survey
09/21/2004
Feature surveyed in 2004
U.S. Geological Survey
12/06/2005
Feature surveyed in 2005
U.S. Geological Survey
accuracy
information unavailable from original metadata
U.S. Geological Survey
information not available from the original metadata
Shape_Leng
Length of feature in meters
U.S. Geological Survey
information not available from the original metadata
E.R. Thieler
U.S. Geological Survey
Research Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2350
508-457-2310
rthieler@usgs.gov
Downloadable Data
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.
SHP
information not available from original metadata
ESRI Polyline Shapefile
The DBF file contains the attribute data in dBASE format. The PRJ file contains the coordinate system information. The SBN and SBX files contain the spatial index of the geospatial data. The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The XML file contains the metadata describing the data set.
zip archive
0.146
http://pubs.usgs.gov/of/2007/1017/data/shapefiles/shorelines.zip
http://pubs.usgs.gov/of/2007/1017/htmldocs/data_catalog.html
Data are downloadable via the World Wide Web (WWW).
DVD-ROM
4.75
Gbytes
UDF
None
These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcExplorer, capable of displaying the data is availab efrom ESRI at www.esri.com.
19360208
20051206
20210901
Emily Himmelstoss
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2262
508-457-2310
whsc_data_contact@usgs.gov
The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS.
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time