Online Links:
Online Links:
Range of values | |
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Minimum: | 0 |
Maximum: | unlimited |
Range of values | |
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Minimum: | 0 |
Maximum: | unlimited |
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Minimum: | no value (when transect was manually created by user) |
Maximum: | unlimited (values based on time and date of automatic generation) |
Range of values | |
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Minimum: | blank or 0 |
Maximum: | 1 |
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Minimum: | 0 |
Maximum: | 360 |
Range of values | |
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Minimum: | 1578.491651 |
Maximum: | 3665.391547 |
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Minimum: | -6.24 |
Maximum: | 21.49 |
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Minimum: | 0 |
Maximum: | 1 |
Range of values | |
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Minimum: | 3.59 |
Maximum: | 896.69 |
Range of values | |
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Minimum: | 13.337 |
Maximum: | 1627.228 |
This dataset consists of long-term (100+ years) shoreline change rates for the Delmarva North region from Cape Henlopen, Delaware to the southern end of Assateague Island, Virginia. Rate calculations were computed within a GIS using the Digital Shoreline Analysis System (DSAS) version 4.1, 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.
Online Links:
Online Links:
Are there legal restrictions on access or use of the data?Access_Constraints: none
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.
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: | This WinZip (version 9.0) file contains a shapefile of transects generated by the Digital Shoreline Analysis System including long-term rate calculations for the Delmarva North region from Cape Henlopen, Delaware to the southern end of Assateague Island, Virginia. in format Shapefile (version ArcGIS 9.3) ESRI polyline shapefile |
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Network links: |
http://pubs.usgs.gov/of/2010/1119/data/DelmarvaN_LT.zip |
This zip file contains data available in Environmental Systems Research Institute (ESRI) polyline 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 the data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.