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Intersects for coastal region of Virginia generated to calculate short-term shoreline change rates using the Digital Shoreline Analysis System version 5.1

Dates

Publication Date
Start Date
1997
End Date
2017

Citation

Bartlett, M.K., Henderson, R.E., and Farris, A.S., 2023, USGS National Shoreline Change—A GIS compilation of vector shorelines and associated shoreline change data for coastal Virginia from the 1840s to 2010s: U.S. Geological Survey data release, https://doi.org/10.5066/P9DHOFXU.

Summary

The U.S. Geological Survey (USGS) has compiled national shoreline data for more than 20 years to document coastal change and serve the needs of research, management, and the public. Maintaining a record of historical shoreline positions is an effective method to monitor national shoreline evolution over time, enabling scientists to identify areas most susceptible to erosion or accretion. These data can help coastal managers and planners understand which areas of the coast are vulnerable to change. This data release includes a compilation of previously published historical shoreline positions for Virginia spanning 148 years (1849-1997), and two new mean high water (MHW) shorelines extracted from lidar data collected in 2010 and 2017. [...]

Contacts

Attached Files

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VA_intersects_ST_browse.JPG
“Virginia short-term intersects browse graphic ”
thumbnail 133.04 KB image/jpeg
Shapefile: VA_intersects_ST.zip
VA_intersects_ST.CPG 5 Bytes
VA_intersects_ST.dbf 530.17 KB
VA_intersects_ST.prj 402 Bytes
VA_intersects_ST.sbn 44.39 KB
VA_intersects_ST.sbx 884 Bytes
VA_intersects_ST.shp 124.79 KB
VA_intersects_ST.shx 35.72 KB

Purpose

This dataset consists of point data which are created by the Digital Shoreline Analysis System (DSAS) version v5.1 at the intersection of shoreline and transect locations. Measurement transects are cast by DSAS from the baseline to intersect shoreline vectors, and the intersect data provide location and time information used to calculate rates of change. These point data contain identification information related to the DSAS transect (TransOrder) as well as the shoreline (ShorelineID, Uncertainty) and proxy-datum bias data (if applicable). They can be used to visually display which shorelines were used in the rate calculations and capture details on the shoreline represented by the intersection. The distances between the reference baseline and each shoreline intersection along a transect are used by the DSAS software to compute the shoreline change metrics.

Additional Information

Shapefile Extension

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