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Intersects for the southern coast of Cape Cod, Massachusetts, generated to calculate shoreline change rates using the Digital Shoreline Analysis System version 5.1

Dates

Publication Date
Time Period
2021

Citation

Bartlett, M.K., Henderson, R.E., Farris, A.S., and Himmelstoss, E.A., 2021, Massachusetts shoreline change project, 2021 update —A GIS compilation of shoreline change rates calculated using Digital Shoreline Analysis System version 5.1, with supplementary intersects and baselines for Massachusetts: U.S. Geological Survey data release, https://doi.org/10.5066/P9YGIYFX.

Summary

The Massachusetts Office of Coastal Zone Management launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast and support local land-use decisions. Trends of shoreline position over long and short-term timescales provide information to landowners, managers, and potential buyers about possible future impacts to coastal resources and infrastructure. In 2001, a 1994 shoreline was added to calculate both long- and short-term shoreline change rates along ocean-facing sections of the Massachusetts coast. In 2013 two oceanfront shorelines for Massachusetts were added using 2008-2009 color aerial orthoimagery and 2007 topographic lidar datasets obtained from NOAA's Ocean Service, Coastal Services Center. In [...]

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Attached Files

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SouthCape_intersects_browse.PNG
“Intersects for the southern coast of Cape Cod”
thumbnail 594.08 KB image/png
Shapefile: SouthCape_intersects_LT.zip
SouthCape_intersects_LT.CPG 5 Bytes
SouthCape_intersects_LT.dbf 2.25 MB
SouthCape_intersects_LT.prj 145 Bytes
SouthCape_intersects_LT.sbn 99.93 KB
SouthCape_intersects_LT.sbx 1.82 KB
SouthCape_intersects_LT.shp 287.54 KB
SouthCape_intersects_LT.shx 82.22 KB
Shapefile: SouthCape_intersects_ST.zip
SouthCape_intersects_ST.CPG 5 Bytes
SouthCape_intersects_ST.dbf 1.58 MB
SouthCape_intersects_ST.prj 145 Bytes
SouthCape_intersects_ST.sbn 67.18 KB
SouthCape_intersects_ST.sbx 1.24 KB
SouthCape_intersects_ST.shp 202.91 KB
SouthCape_intersects_ST.shx 58.04 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. Rate calculations were computed within a GIS using the Digital Shoreline Analysis System (DSAS) version 5.1, an ArcGIS extension developed by the U.S. Geological Survey. 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 (TransectID, TransOrder) as well as the shoreline (ShorelineID, Uncertainty) and proxy-datum bias data (if applicable).

Additional Information

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