U.S. Geological Survey
2019
Intersects for Outer Cape Cod, Massachusetts, generated to calculate shoreline change rates using the Digital Shoreline Analysis System version 5.0
1.0
vector digital data
data release
DOI:10.5066/P9RRBEYK
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.5066/P9RRBEYK
https://www.sciencebase.gov/catalog/item/5c658872e4b0fe48cb38fcef
Emily A. Himmelstoss
Amy S. Farris
Kathryn M. Weber
Rachel E. Henderson
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
1.0
vector digital data
data release
DOI:10.5066/P9RRBEYK
Reston, VA
U.S. Geological Survey
suggested 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: U.S. Geological Survey data release, https://doi.org/10.5066/P9RRBEYK
https://doi.org/10.5066/P9RRBEYK
https://www.sciencebase.gov/catalog/item/5be5857ce4b0b3fc5cf8c6ca
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 the 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.
This dataset consists of point data which are created by the Digital Shoreline Analysis System (DSAS) version v5.0 at the intersection of shoreline and transect locations. A reference baseline was used as the originating point for the orthogonal transects cast by the DSAS software. These point data contain identification information related to the DSAS transect (TransectID, TransOrder) as well as the shoreline (ShorelineID, Uncertainty). 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.
2019
publication date
None planned
-70.246281
-69.925850
42.082528
41.539758
USGS Metadata Identifier
USGS:5c658872e4b0fe48cb38fcef
ISO 19115 Topic Category
oceans
environment
geoscientificInformation
None
Intersects
Shoreline
Shoreline Change
Digital Shoreline Analysis System
DSAS
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Woods Hole Coastal and Marine Science Center
WHCMSC
USGS Thesaurus
geospatial datasets
coastal processes
None
Atlantic Coast
United States
North America
Massachusetts
Outer Cape
None.
These data were automatically generated using the DSAS v5.0 software applications. 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. These data are not to be used for navigation.
U.S. Geological Survey
Emily A. Himmelstoss
mailing and physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x 2262
508-457-2310
ehimmelstoss@usgs.gov
https://www.sciencebase.gov/catalog/file/get/5c658872e4b0fe48cb38fcef/?name=OuterCape_intersects_browse.png
Map view of data
png
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.5.0.6491
Emily A. Himmelstoss
Amy S. Farris
Rachel E. Henderson
Meredith G. Kratzmann
Ayhan Ergul
Ouya Zhang
Jessica L. Zichichi
2018
Digital Shoreline Analysis System (version 5.0): U.S. Geological Survey Software
software release
version 5.0
Reston, VA
U.S. Geological Survey
https://code.usgs.gov/cch/dsas/
https://doi.org/10.5066/P9VW42I0
https://woodshole.er.usgs.gov/project-pages/DSAS/
Emily A. Himmelstoss
Rachel E. Henderson
Meredith G. Kratzmann
Amy S. Farris
2018
DSAS v5.0 user guide
publication
Open-File Report
2018-1179
Reston, VA
U.S. Geological Survey
https://doi.org/10.3133/ofr20181179
https://woodshole.er.usgs.gov/project-pages/DSAS/
Emily A. Himmelstoss
Amy S. Farris
Kathryn M. Weber
2018
Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines for the 2018 update
DOI:10.5066/P9O7S72B
data release
DOI:10.5066/P9O7S72B
Reston, VA
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.5066/P9O7S72B
https://www.sciencebase.gov/catalog/item/5bcde5dce4b0f0758fc178d0
https://www.sciencebase.gov/catalog/file/get/5bcde5dce4b0f0758fc178d0
Peter Ruggiero
Jeffrey H. List
200909
Improving Accuracy and Statistical Reliability of Shoreline Position and Change Rate Estimates
publication
Journal of Coastal Research
vol. 255
n/a
Coastal Education and Research Foundation
ppg. 1069-1081
https://doi.org/10.2112/08-1051.1
The attributes of this dataset are based on the field requirements of the Digital Shoreline Analysis System and were automatically generated by the software during the generation of the intersects layer.
These data were generated using DSAS, an automated software program, which does not perform checks for fidelity of the input features. Following generation of the rates and intersects by the DSAS software a visual inspection of the intersects was performed in map view to determine that no unwanted measurements were included in the desired (long- or short-term) shoreline change analysis.
This dataset contains all the shoreline/transect intersects used to compute rates in the DSAS v5.0 software application.
The intersection points represent the location where transects cast by the Digital Shoreline Analysis System (DSAS) software crosses a historical shoreline position. 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. The positional uncertainties associated with the shoreline and intersection points are captured in the shoreline attribute table. See https://doi.org/10.5066/P9O7S72B
Process_Description: Transect features generated in a personal geodatabase using DSAS v5.0.20180906.1125. Parameters Used: baseline layer=OuterCape_baseline_front, baseline group field=NULL, transect spacing=50 meters, search distance=1000 meters, land direction=right, shoreline intersection=seaward, File produced = OuterCape_front_transect. For additional details on these parameters, please see the DSAS help file distributed with the DSAS software, or visit the USGS website at: https://woodshole.er.usgs.gov/project-pages/DSAS/.
This process step and all subsequent process steps were performed by the same person - Emily A. Himmelstoss.
2018
Emily A. Himmelstoss
U.S. Geological Survey
mailing and physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x 2262
508-457-2310
ehimmelstoss@usgs.gov
Process_Description: Transect features generated in a personal geodatabase using DSAS v5.0.20180906.1125. Parameters Used: baseline layer=OuterCape_baseline_back, baseline group field=NULL, transect spacing=50 meters, search distance=1000 meters, land direction=right, shoreline intersection=seaward, File produced = OuterCape_back_transect.
2018
Some transects were manually edited for length, moved, or deleted in an edit session using standard editing tools in ArcMap v10.5.1
2018
Shoreline intersects and rate calculations performed for long-term rates with bias. Parameters Used: shoreline layer=OuterCape_LT_shorelines, shoreline date field=DSAS_date, shoreline uncertainty field name=Uncy, the default accuracy=4.4 meters, shoreline intersection=seaward, stats calculations=[LRR], shoreline threshold=3, confidence interval=90%. Files produced = OuterCape_PDB_LT_rates_20180323_153649, OuterCape_PDB_LT_intersect_20180323_153649.
2018
Shoreline intersects and rate calculations performed for long-term rates without bias. Parameters Used: shoreline layer=OuterCape_LT_shorelines, shoreline date field=DSAS_date, shoreline uncertainty field name=Uncy, the default accuracy=10 meters, shoreline intersection=seaward, stats calculations=[LRR], shoreline threshold=3, confidence interval=90%. Files produced = OuterCape_NB_LT_rates_20180326_123530, OuterCape_NB_LT_intersect_20180326_123530.
2018
Shoreline intersects and rate calculations performed for short-term rates with bias. Parameters Used: shoreline layer=OuterCape_ST_shorelines, shoreline date field=DSAS_date, shoreline uncertainty field name=Uncy, the default accuracy=4.4 meters, shoreline intersection=seaward, stats calculations=[LRR], shoreline threshold=3, confidence interval=90%. Files produced = OuterCape_PDB_ST_rates_20180323_164641, OuterCape_PDB_ST_intersect_20180323_164641.
2018
Shoreline intersects and rate calculations performed for short-term rates without bias. Parameters Used: shoreline layer=OuterCape_ST_shorelines, shoreline date field=DSAS_date, shoreline uncertainty field name=Uncy, the default accuracy=4.4 meters, shoreline intersection=seaward, stats calculations=[LRR], shoreline threshold=3, confidence interval=90%. Files produced = OuterCape_NB_ST_rates_20180326_130816, OuterCape_NB_ST_intersect_20180326_130816.
2018
The intersect feature classes were exported to shapefiles in ArcMap v10.5 by right-clicking the transect layer > data > export data.
2018
The exported intersect shapefiles were projected in Esri's ArcToolbox (v10.5) > Data Management Tools > Projections and Transformations > Project. Parameters: input projection - UTM zone 19N (WGS84); output projection - geographic coordinates (WGS84); transformation = none.
2018
Added keywords section with USGS persistent identifier as theme keyword.
20200810
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Vector
String
15338X
0.0000001
0.0000001
Decimal degrees
WGS_1984
WGS_1984
6378137.000000
298.257224
OuterCape_front_PDB_LT_intersects.shp
The intersection points are generated by DSAS where each DSAS generated transect crosses a shoreline. These intersections represent the shorelines used to compute long-term rates where the proxy-datum bias correction has been applied.
U.S. Geological Survey
FID
Internal feature number used as a unique identifier of an object within a table primarily used in shapefiles.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
The geometry field (shape) is automatically created and maintained by ArcGIS. It provides a definition of the feature type (point, line, polygon).
Esri
Coordinates defining the features.
TransectID
The TransectID relates directly to the original transect file Object Identifier, ObjectID or OID
U.S. Geological Survey
1
unlimited
BaselineID
Values in this field correlate to the baseline attribute field “ID” and are assigned by DSAS to identify the baseline segment used to generate the measurement transect. Baseline segments assigned an ID = 0 are ignored by DSAS and no transects will be cast along those line segments.
U.S. Geological Survey
1
unlimited
ShorelineI
Date of shoreline position; date of survey as determined from shoreline layer.
U.S. Geological Survey
Date of the shoreline in mm/dd/yyyy
Distance
The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect.
U.S. Geological Survey
Decimal values may be positive or negative, which is used to indicate landward (negative) or seaward (positive) direction from baseline origin.
IntersectX
The X-coordinate location in eastings of the intersect point in WGS84 UTM19N.
U.S. Geological Survey
322800
422900
IntersectY
The Y-coordinate location in northings of the intersect point in WGS84 UTM19N.
U.S. Geological Survey
4565600
4748600
Uncertaint
The uncertainty of the shoreline intersect point as defined by the positional-uncertainty value (DSAS_uncy) of the shoreline (ShorelineID).
U.S. Geological Survey
0
unlimited
Bias_Dista
The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect with the proxy-datum bias applied.
U.S. Geological Survey
0
unlimited
BIAS
The estimated unidirectional horizontal offset between the MHW elevation of the lidar data and the HWL shoreline position.
U.S. Geological Survey
0
unlimited
BIAS_X
The X-coordinate location of the intersect point with the bias applied.
U.S. Geological Survey
322800
422900
BIAS_Y
The Y-coordinate location of the intersect point with the bias applied.
U.S. Geological Survey
4565600
4748600
Bias_Uncer
This is an estimate of the uncertainty of the bias corrected shoreline. It is the shoreline uncertainty and the bias uncertainty added in quadrature.
U.S. Geological Survey
0
unlimited
OuterCape_back_NB_LT_intersects.shp
The intersection points are generated by DSAS where each DSAS generated transect crosses a shoreline. These intersections represent the shorelines used to compute long-term rates where the proxy-datum bias correction has not been applied.
U.S. Geological Survey
FID
Internal feature number used as a unique identifier of an object within a table primarily used in shapefiles.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
Esri
Coordinates defining the features.
TransectID
The TransectID relates directly to the original transect file Object Identifier, ObjectID or OID
U.S. Geological Survey
0
unlimitted
BaselineID
Values in this field correlate to the baseline attribute field ID and are assigned by DSAS to identify the baseline segment used to generate the measurement transect. Baseline segments assigned an ID = 0 are ignored by DSAS and no transects will be cast along those line segments.
U.S. Geological Survey
0
unlimitted
ShorelineI
Date of shoreline position; date of survey as determined from shoreline layer.
U.S. Geological Survey
Date of the shoreline in mm/dd/yyyy
Distance
The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect.
U.S. Geological Survey
Decimal values may be positive or negative, which is used to indicate landward (negative) or seaward (positive) direction from baseline origin.
IntersectX
The X-coordinate location in eastings of the intersect point in WGS84 UTM19N.
U.S. Geological Survey
322800
422900
IntersectY
The Y-coordinate location in northings of the intersect point in WGS84 UTM19N.
U.S. Geological Survey
4565600
4748600
Uncertaint
The uncertainty of the shoreline position at the intersect point, as defined by the positional uncertainty attribute value (DSAS_uncy) of the shoreline.
U.S. Geological Survey
0
unlimited
OuterCape_front_PDB_ST_intersects.shp
The intersection points are generated by DSAS where each DSAS generated transect crosses a shoreline. These intersections represent the shorelines used to compute short-term rates where the proxy-datum bias correction has been applied.
U.S. Geological Survey
FID
Internal feature number used as a unique identifier of an object within a table primarily used in shapefiles.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
The geometry field (shape) is automatically created and maintained by ArcGIS. It provides a definition of the feature type (point, line, polygon).
Esri
Coordinates defining the features.
TransectID
The TransectID relates directly to the original transect file Object Identifier, ObjectID or OID
U.S. Geological Survey
1
unlimited
BaselineID
Values in this field correlate to the baseline attribute field “ID” and are assigned by DSAS to identify the baseline segment used to generate the measurement transect. Baseline segments assigned an ID = 0 are ignored by DSAS and no transects will be cast along those line segments.
U.S. Geological Survey
1
unlimited
ShorelineI
Date of shoreline position; date of survey as determined from shoreline layer.
U.S. Geological Survey
Date of the shoreline in mm/dd/yyyy
Distance
The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect.
U.S. Geological Survey
Decimal values may be positive or negative, which is used to indicate landward (negative) or seaward (positive) direction from baseline origin.
IntersectX
The X-coordinate location in eastings of the intersect point in WGS84 UTM19N.
U.S. Geological Survey
322800
422900
IntersectY
The Y-coordinate location in northings of the intersect point in WGS84 UTM19N.
U.S. Geological Survey
4565600
4748600
Uncertaint
The uncertainty of the shoreline intersect point as defined by the positional-uncertainty value (DSAS_uncy) of the shoreline (ShorelineID).
U.S. Geological Survey
0
unlimited
Bias_Dista
The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect with the proxy-datum bias applied.
U.S. Geological Survey
0
unlimited
BIAS
The estimated unidirectional horizontal offset between the MHW elevation of the lidar data and the HWL shoreline position.
U.S. Geological Survey
0
unlimited
BIAS_X
The X-coordinate location of the intersect point with the bias applied.
U.S. Geological Survey
322800
422900
BIAS_Y
The Y-coordinate location of the intersect point with the bias applied.
U.S. Geological Survey
4565600
4748600
Bias_Uncer
This is an estimate of the uncertainty of the bias corrected shoreline. It is the shoreline uncertainty and the bias uncertainty added in quadrature.
U.S. Geological Survey
0
unlimited
OuterCape_back_NB_ST_intersects.shp
The intersection points are generated by DSAS where each DSAS generated transect crosses a shoreline. These intersections represent the shorelines used to compute short-term rates where the proxy-datum bias correction has not been applied.
U.S. Geological Survey
FID
Internal feature number used as a unique identifier of an object within a table primarily used in shapefiles.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
Esri
Coordinates defining the features.
TransectID
The TransectID relates directly to the original transect file Object Identifier, ObjectID or OID
U.S. Geological Survey
0
unlimitted
BaselineID
Values in this field correlate to the baseline attribute field ID and are assigned by DSAS to identify the baseline segment used to generate the measurement transect. Baseline segments assigned an ID = 0 are ignored by DSAS and no transects will be cast along those line segments.
U.S. Geological Survey
0
unlimitted
ShorelineI
Date of shoreline position; date of survey as determined from shoreline layer.
U.S. Geological Survey
Date of the shoreline in mm/dd/yyyy
Distance
The distance in meters between the DSAS reference baseline and the shoreline intersection point along a DSAS transect.
U.S. Geological Survey
Decimal values may be positive or negative, which is used to indicate landward (negative) or seaward (positive) direction from baseline origin.
IntersectX
The X-coordinate location in eastings of the intersect point in WGS84 UTM19N.
U.S. Geological Survey
322800
422900
IntersectY
The Y-coordinate location in northings of the intersect point in WGS84 UTM19N.
U.S. Geological Survey
4565600
4748600
Uncertaint
The uncertainty of the shoreline position at the intersect point, as defined by the positional uncertainty attribute value (DSAS_uncy) of the shoreline.
U.S. Geological Survey
0
unlimited
The entity and attribute information provided here describes the tabular data associated with the intersects needed to calculate long-term (greater than 50 years, and typically closer to 100 years) and short-term (approximately 30 years) shoreline change rates, as well as intersects that incorporate the known unidirectional offset between proxy-based high water line features and datum-based mean high water line features (the proxy-datum bias), and intersects that did not have the necessary information to correct for this offset (no bias). Please review the individual attribute descriptions for detailed information. All calculations for length are in meter units and were based on the UTM zone 19N WGS 84 projection. This region has four shapefiles describing intersects; long-term with bias, long-term without bias, short-term with bias, and short-term without bias.
U.S. Geological Survey
U.S. Geological Survey - ScienceBase
mailing and physical address
Denver Federal Center, Building 810, Mail Stop 302
Denver
CO
80225
United States
1-888-275-8747
sciencebase@usgs.gov
The dataset contains the point intersections used for the analysis of shoreline data, (SHP and other shapefile components), browse graphic, and the FGDC CSDGM metadata in XML and TEXT format.
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. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), and have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Shapefile
ArcGIS 10.5
Esri point shapefile
These files (.cpg, .dbf, .prj, .sbn, .sbx, .shp, .shp., xml, and .shx) are a collection of files with a common filename prefix and must be downloaded and stored in the same directory. Together they are the components of the shapefile and include FGDC CSDGM-compliant metadata.
no compression applied
4
https://www.sciencebase.gov/catalog/file/get/5c658872e4b0fe48cb38fcef
https://www.sciencebase.gov/catalog/item/5c658872e4b0fe48cb38fcef
https://doi.org/10.5066/P9RRBEYK
The first link downloads all the data on the landing page, the second link is to the dataset landing page, and the third link is to the main landing page of the data release.
WMS
1.3.0
Web Mapping Services 1.3.0
https://www.sciencebase.gov/catalogMaps/mapping/ows/5c658872e4b0fe48cb38fcef?service=wms&request=getcapabilities&version=1.3.0
https://www.sciencebase.gov/catalog/item/5c658872e4b0fe48cb38fcef
https://doi.org/10.5066/P9RRBEYK
The first link is for the Web Mapping Services, the second link is to the dataset landing page, and the third link is to the main landing page of the data release.
WFS
1.0.0
Web Feature Services 1.0.0
https://www.sciencebase.gov/catalogMaps/mapping/ows/5c658872e4b0fe48cb38fcef?service=wfs&request=getcapabilities&version=1.0.0
https://www.sciencebase.gov/catalog/item/5c658872e4b0fe48cb38fcef
https://doi.org/10.5066/P9RRBEYK
The first link is for the Web Feature Services, the second link is to the dataset landing page, and the third link is to the main landing page of the data release.
None
These data are available in a point shapefile format. The user must have software to read and process the data components of a shapefile.
20200810
Emily A. Himmelstoss
U.S. Geological Survey
mailing and physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2262
508-547-2310
ehimmelstoss@usgs.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time