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Range of values | |
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Minimum: | 07/01/1901 |
Maximum: | 02/25/1987 |
Range of values | |
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Minimum: | 3.99 |
Maximum: | 12.84 |
Value | Definition |
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Wet/Dry Line | This is defined as the most recent swash line and is delineated as the boundary between the wet and dry beach. All aerial photo shorelines are wet/dry lines. |
HWL | High Water Line. This is distinguished as the last high tide swash line, usually found more landward of the wet/dry line. All T-sheet shorelines are high water lines. |
Value | Definition |
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PRDRN | Departamento de Recursos Naturales (Department of Natural Resources), San Juan, Puerto Rico |
USDA-SCS | U.S. Department of Agriculture - Soil Conservation Service, Salt Lake City, Utah |
USGS, PRDC | U.S. Geological Survey, National Cartographic Information Center, Rockville, Maryland; Departamento de Carreteras (Department of Transportation), San Juan, Puerto Rico |
PRDC | Departamento de Carreteras (Department of Transportation), San Juan, Puerto Rico |
NOAA | National Oceanic and Atmospheric Administration |
Value | Definition |
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Aerial Photo | Aerial Photo |
NOS TP-Sheet | National Oceanic Service topographic sheet, TP series |
NOS T-Sheet | National Oceanic Service topographic sheet, T series |
Range of values | |
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Minimum: | 1901 |
Maximum: | 1987 |
An interpreation of the original shoreline data, similar to what can be found in this data release, were part of a previously published Open File Report (OFR 93-574). The rates and images of the shoreline extents were published in this OFR but the shoreline shapefiles themselves were not published. This data release is an effort to recover, edit, and add to the existing shoreline data through a thorough quality assurance/quality control (QA/QC) workflow. Shorelines were digitized from georeferenced T-sheets and air photographs, using the high-water line and wet-dry line, respectively, as a shoreline reference. These data are used in conjunction with other shoreline files to calculate rates of shoreline change.
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Are there legal restrictions on access or use of the data?Access_Constraints: None. Please see 'Distribution Info' for details.
Use_Constraints:Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Data format: | Dataset contains the shapefile, browse graphic, and CSDGM metadata. in format Shapefile (version ArcGIS 10.7) Esri Polyline Shapefile Size: 3.64 |
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Network links: |
https://doi.org/10.5066/P9CLXCEG https://www.sciencebase.gov/catalog/file/get/60cb7627d34e86b938a3a1b0 https://www.sciencebase.gov/catalog/item/60cb7627d34e86b938a3a1b0 |