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USGS Map service: National Shoreline Change - Long-Term Shoreline Change Rates

Beach erosion is a chronic problem along most open-ocean shores of the United States. As coastal populations continue to grow, and community infrastructures are threatened by erosion, there is increased demand for accurate information regarding past and present shoreline changes. There is also need for a comprehensive analysis of shoreline movement that is regionally consistent. To meet these national needs, the USGS National Assessment of Shoreline Change Project has collected and analyzed a comprehensive database of digital vector shorelines by compiling shoreline positions from pre-existing historical shoreline databases and by generating historical and modern shoreline data. This dataset consists of long-term (100+ years) shoreline change rates. Rate calculations were computed using the Digital Shoreline Analysis System (DSAS), an ArcGIS extension developed by the U.S. Geological Survey. Long-term rates of shoreline change were calculated using a linear regression rate based on all available shoreline data. 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 are then used to calculate long-term rates. To make these results more accessible to the public and other agencies, the USGS created this web service. This web service was created utilizing Esri ArcServer. This service meets open geospatial consortium standards. The data compilation used to derive the shoreline change rates is available in a service with the title USGS Map service: National Shoreline Change - Historic Shorelines by State. The reference baseline used to derive the shoreline change rates is available in a service with the title USGS Map service: National Shoreline Change - Offshore Baseline. The locations of the transects used in the change rate calculation are available in a service with the title USGS Map service: National Shoreline Change - Intersection Points. The geographic information system (GIS) data layers from this web service are cataloged by state for ease of access.

Data and Resources

Additional Info

Field Value
Last Updated March 4, 2021, 17:48 (EST)
Created March 4, 2021, 17:48 (EST)
GUID
access_constraints ["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 as the originator of the dataset.", "Access Constraints: None"]
bbox-east-long -66.97
bbox-north-lat 49.37
bbox-south-lat 24.96
bbox-west-long -124.73
contact-email jomalley@usgs.gov
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2011-01-01"}]
encoding utf8
frequency-of-update notPlanned
harvest_url http://catalog.data.gov/dataset/0090434f-f28c-4678-bf69-5a12ce03475c
licence ["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. \n\nAny use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government."]
metadata-date 2018-09-06
metadata-language
metadata_type geospatial
progress completed
resource-type dataset
responsible-party [{"name": "U.S. Geological Survey", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-124.73, 24.96], [-66.97, 24.96], [-66.97, 49.37], [-124.73, 49.37], [-124.73, 24.96]]]}
spatial-data-service-type
spatial-reference-system
spatial_harvester true