Long-term and short-term shoreline change rates for the southern coastal region of Cape Cod, Massachusetts calculated without the proxy-datum bias using the Digital Shoreline Analysis System version 5.0

Dates

Publication Date: 2019-03-06

Citation

Himmelstoss, E.A., Farris, A.S., Weber, K.M., and Henderson, R.E., 2019, Massachusetts shoreline change project, 2018 update–A GIS compilation of shoreline change rates calculated using Digital Shoreline Analysis System version 5.0, with supplementary intersects and baselines for Massachusetts (ver. 2.0, August 2019): U.S. Geological Survey data release, https://doi.org/10.5066/P9RRBEYK.

Summary

The Massachusetts Office of Coastal Zone Management launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast. The shoreline position and change rate are used to inform management decisions regarding the erosion of coastal resources. In 2001, a shoreline from 1994 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 2008-9 color aerial orthoimagery and 2007 topographic lidar datasets obtained from the National Oceanic and Atmospheric Administration's Ocean Service, Coastal Services Center. This 2018 data release includes rates that incorporate two new mean [...]

Summary

The Massachusetts Office of Coastal Zone Management launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast. The shoreline position and change rate are used to inform management decisions regarding the erosion of coastal resources. In 2001, a shoreline from 1994 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 2008-9 color aerial orthoimagery and 2007 topographic lidar datasets obtained from the National Oceanic and Atmospheric Administration's Ocean Service, Coastal Services Center. This 2018 data release includes rates that incorporate two new mean high water (MHW) shorelines for the Massachusetts coast extracted from lidar data collected between 2010 and 2014. The first new shoreline for the State includes data from 2010 along the North Shore and South Coast from lidar data collected by the U.S. Army Corps of Engineers (USACE) Joint Airborne Lidar Bathymetry Technical Center of Expertise. Shorelines along the South Shore and Outer Cape are from 2011 lidar data collected by the U.S. Geological Survey's (USGS) National Geospatial Program Office. Shorelines along Nantucket and Martha’s Vineyard are from a 2012 USACE Post Sandy Topographic lidar survey. The second new shoreline for the North Shore, Boston, South Shore, Cape Cod Bay, Outer Cape, South Cape, Nantucket, Martha’s Vineyard, and the South Coast (around Buzzards Bay to the Rhode Island Border) is from 2013-14 lidar data collected by the (USGS) Coastal and Marine Geology Program. This 2018 update of the rate of shoreline change in Massachusetts includes two types of rates. Some of rates include a proxy-datum bias correction, this is indicated in the filename with “PDB”. The rates that do not account for this correction have “NB” in their file names. The proxy-datum bias is applied because in some areas a proxy shoreline (like a High Water Line shoreline) has a bias when compared to a datum shoreline (like a Mean High Water shoreline). In areas where it exists, this bias should be accounted for when calculating rates using a mix of proxy and datum shorelines. This issue is explained further in Ruggiero and List (2009) and in the process steps of the metadata associated with the rates. This release includes both long-term (~150 years) and short term (~30 years) rates. Files associated with the long-term rates have “LT” in their names, files associated with short-term rates have “ST” in their names.

Contacts

Point of Contact :: Emily Himmelstoss
Originator :: Emily Himmelstoss, Amy Farris, Kathryn M Weber, Rachel E Henderson
Publisher :: U.S. Geological Survey, Coastal and Marine Geology Program
Distributor :: U.S. Geological Survey - ScienceBase

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SouthCape_rates_meta.xml Original FGDC Metadata	View	47.39 KB	application/fgdc+xml
SouthCape_rates_browse.png		165.25 KB	image/png
SouthCape_rates_meta.html		93.99 KB	text/html
SouthCape_rates_meta.txt		44.33 KB	text/plain

Shapefile: SouthCape_NB_LT_rates.zip
SouthCape_NB_LT_rates.CPG		5 Bytes
SouthCape_NB_LT_rates.dbf		276.95 KB
SouthCape_NB_LT_rates.prj		145 Bytes
SouthCape_NB_LT_rates.sbn		14.54 KB
SouthCape_NB_LT_rates.sbx		532 Bytes
SouthCape_NB_LT_rates.shp		156.4 KB
SouthCape_NB_LT_rates.shx		12.12 KB

Shapefile: SouthCape_NB_ST_rates.zip
SouthCape_NB_ST_rates.CPG		5 Bytes
SouthCape_NB_ST_rates.dbf		276.77 KB
SouthCape_NB_ST_rates.prj		145 Bytes
SouthCape_NB_ST_rates.sbn		14.53 KB
SouthCape_NB_ST_rates.sbx		532 Bytes
SouthCape_NB_ST_rates.shp		156.3 KB
SouthCape_NB_ST_rates.shx		12.11 KB

Related External Resources

Type: Citation

Himmelstoss, E.A., Farris, A.S., Henderson, R.E., Kratzmann, M.G., Ergul, A., Zhang, O., Zichichi, J.L., and Thieler, E.R., 2018, Digital Shoreline Analysis System (version 5.0): U.S. Geological Survey software, https://doi.org/10.5066/P9VW42I0.	https://doi.org/10.5066/P9VW42I0
Himmelstoss, E.A., Henderson, R.E., Kratzmann, M.G., and Farris, A.S., 2018, Digital Shoreline Analysis System (DSAS) version 5.0 user guide: U.S. Geological Survey Open-File Report 2018–1179, 110 p., https://doi.org/10.3133/ofr20181179.	https://doi.org/10.3133/ofr20181179

Type: Web Link

Digital Shoreline Analysis System (DSAS) project page	https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas

Purpose

This dataset describes the long-term (~150 years) and short-term (~30 years) shoreline change rates for the southern Cape Cod coastal region. Rate calculations were computed within a GIS using the Digital Shoreline Analysis System (DSAS) version 5.0, an ArcGIS extension developed by the U.S. Geological Survey. Long-term and short-term rates of shoreline change were calculated using a linear regression rate based on 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 rates. This dataset consists of shoreline change rates calculated with DSAS v5.0 and stored as a new transect layer. Original 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.

Long-term and short-term shoreline change rates for the southern coastal region of Cape Cod, Massachusetts calculated without the proxy-datum bias using the Digital Shoreline Analysis System version 5.0

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