The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS. Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.
Digital Shoreline Analysis System (DSAS) Active
Software for calculating positional boundary change over time
The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS. Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions. It provides an automated method for establishing measurement transects, performs rate calculations, and provides uncertainties associated with rates of change. A user-friendly interface allows the user to complete the workflow for shoreline change analysis.
Suggested citation:
Himmelstoss, E.A., Henderson, R.E., Farris, A.S., Kratzmann, M.G., Bartlett, M.K., Ergul, A., McAndrews, J., Cibaj, R., Zichichi, J.L., and Thieler, E.R., 2024, Digital Shoreline Analysis System version 6.0: U.S. Geological Survey software release, https://doi.org/10.5066/P13WIZ8M.
The existing user guide originally written for DSAS v.5.1 is available and applicable to many aspects of DSAS v.6.0. The user guide has relevant information providing instruction on the DSAS workflow including how to define a reference baseline for measurements, attribute requirements for baselines and shorelines, and supporting information on rate calculations and statistics.
For additional questions please contact DSAS_help@usgs.gov
PLEASE NOTE: The USGS End of Life (EOL) date for ArcMap was February 1, 2024, as there will no longer be software updates and patches released from Esri. ArcMap’s EOL is the primary reason we have developed DSAS v.6.0 as standalone software that will work with any GIS. Due to the timeline constraints, this first-released software version was developed with minimal functionality in mind in order to meet essential user needs. In later development phases, we plan to reinstate capability from v.5 and explore more enhancements. Thank you for understanding!
Current Version
DSAS version 6.0 was released in April 2024 and is publicly available here.
Baseline and shoreline data are prepared in a GIS and converted to .geojson format prior to upload in DSAS. DSAS uses and outputs GeoJSON files which include geospatial and tabular data. Some GIS programs, such as QGIS, can view and edit GeoJSON files directly, and some, like ArcPro require a conversion before they can be viewed. Editing must be done in GIS software.
In version 6.0, only onshore or offshore baselines will be accepted for rate calculation.
Introduction
DSAS generates transects that are cast perpendicular to the reference baseline to intersect shorelines at a user-specified spacing alongshore. Please note that the figure above illustrates the placement of both onshore and offshore baselines as examples. In DSAS v6.0 all baselines in a file must be placed either offshore or onshore, not combined.
DSAS measures the distance between the baseline and each shoreline intersection along a transect, and combines date information, and positional uncertainty for each shoreline, to generate the following change metrics (see DSAS v.5.1 user guide for more detail):
Distance measurements:
- Shoreline Change Envelope (SCE)
- Net Shoreline Movement (NSM)
Statistics:
- End Point Rate (EPR)
- Uncertainty of the End Point Rate (EPRunc)
- Linear Regression Rate (LRR)
- Confidence Interval (LCI)
- Standard Error (LSE)
- R-squared (LR2)
- Weighted Linear Regression Rate (WLR)
- Confidence Interval (WCI)
- Standard Error (WSE)
- R-squared (WR2)
The results of all calculations are output to a rates file (.geojson) accompanied by an intersects file (.geojson) and associated metadata (.xml). Users also have the option to generate a summary report (.txt).
History
DSAS has been a central component of the U.S. Geological Survey’s Coastal Change Hazards programmatic focus, providing a robust suite of regression rates in a standardized and easily repeatable method that can be executed on large volumes of data collected at a national scale. The DSAS software is intended to facilitate the shoreline change-calculation process and to provide rate-of-change information and the statistical data necessary to establish the reliability of the calculated results.
The software is also suitable for any application that calculates positional change over time, such as assessing change of glacier limits in sequential aerial photos, river edge boundaries, or land-cover changes. National and state governments worldwide have used the tool in support of resource management and critical coastal decision-making.
The DSAS software was originally developed in the early 1990s and has undergone continuous refinement since that time.
- DSAS version 1.0 (1992) was written in the C and awk programming languages for use with the MapGrafix and ArcInfo Geographic Information Systems
- DSAS version 2.0 was written in Avenue for ArcView 3.x
- DSAS version 3.x (ArcGIS 9)
- DSAS version 4.2 (ArcGIS 9.2-9.3.x)
- DSAS version 4.3 (ArcGIS 10.0-10.3)
- DSAS version 4.4 (ArcGIS 10.4 -10.5)
- DSAS version 5.0 - 5.1 (ArcGIS 10.4 - 10.x)
Current version, 6.0, is a standalone application to be used in conjunction with a GIS
Below are data releases associated with the DSAS project.
National Shoreline Change—A GIS compilation of vector shorelines and associated shoreline change data from the 1800s to 2010s for the coast of California
USGS National Shoreline Change - A GIS compilation of new lidar-derived shorelines (2010, 2017, and 2018) and associated shoreline change data for coastal South Carolina
USGS National Shoreline Change — A GIS compilation of vector shorelines and associated shoreline change data for coastal Virginia from the 1840s to 2010s
Puerto Rico shoreline change: A GIS compilation of shorelines, baselines, intersects, and change rates calculated using the Digital Shoreline Analysis system version 5.1 (ver. 2.0, March 2023)
A GIS Compilation of Vector Shorelines and Shoreline Classification for Puerto Rico from 1970 and 2010
A GIS Compilation of Vector Shorelines for Puerto Rico from 2015 to 2018
Historical Shorelines for Puerto Rico from 1901 to 1987
USGS National Shoreline Change: A GIS compilation of Updated Vector Shorelines (1800s - 2010s) and Associated Shoreline Change Data for the Georgia and Florida Coasts.
Preliminary estimates of forecasted shoreline positions and associated uncertainties for Florida and Georgia
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
Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines (1844-2018)
Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines for the 2018 update
Below are multimedia items associated with this project.
The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS. Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.
DSAS generates transects that are cast perpendicular to the reference baseline to intersect shorelines at a user-specified spacing alongshore. Please note that the figure above illustrates the placement of both onshore and offshore baselines as examples. In DSAS v6.0 all baselines in a file must be placed either offshore or onshore, not combined.
DSAS generates transects that are cast perpendicular to the reference baseline to intersect shorelines at a user-specified spacing alongshore. Please note that the figure above illustrates the placement of both onshore and offshore baselines as examples. In DSAS v6.0 all baselines in a file must be placed either offshore or onshore, not combined.
The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS. Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.
The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS. Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.
The existing user guide originally written for DSAS v.5.1 is available and applicable to many aspects of DSAS v.6.0. The user guide has relevant information providing instruction on the DSAS workflow including how to define a reference baseline for measurements, attribute requirements for baselines and shorelines, and supporting information on rate calculations and statistics.
Digital Shoreline Analysis System (DSAS) version 5.1 user guide
National shoreline change—Summary statistics for vector shorelines from the early 1900s to the 2010s for Puerto Rico
U.S. Geological Survey national shoreline change— Summary statistics for updated vector shorelines (1800s–2010s) and associated shoreline change data for the Georgia and Florida coasts
Digital Shoreline Analysis System (DSAS) version 5.1 user guide
The Digital Shoreline Analysis System (DSAS) Version 4.0 - An ArcGIS extension for calculating shoreline change
The Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS extension for calculating historic shoreline cange
Digital Shoreline Analysis System (DSAS) version 2.0: An ArcView extension for calculating shoreline change
Historical shoreline mapping (II): Application of the Digital Shoreline Mapping and Analysis Systems (DSMS/DSAS) to shoreline change mapping in Puerto Rico
Historical shoreline mapping (I): improving techniques and reducing positioning errors
Digital Shoreline Analysis System (DSAS) user's guide; version 1.0
National Shoreline Change
Exploring Shoreline Positions of the United States From the 1800s To The Present. This geonarrative explains how the USGS derives shorelines from various data sources, and how shoreline change rates are generated from these data. The Natural Hazards Mission Area programs of the USGS develop and apply hazard science to help protect the safety, security, and economic well-being of the Nation.
Our Coasts
USGS Coastal Change Hazards research provides scientific tools to protect lives, property, and the economic well being of the Nation. The mission of the USGS Coastal Change Hazards Program is to provide research and tools to protect lives, property, and the economic well-being of the Nation. This is a story map that introduces the value of our coasts and the threats they face with global change.
Below are links to software associated with the DSAS project.
Digital Shoreline Analysis System v5.1
The Digital Shoreline Analysis System version 5.1 software is an add-in to Esri ArcGIS Desktop version 10.4–10.7 that enables a user to calculate rate-of-change statistics from a time series of vector shoreline positions.
Digital Shoreline Analysis System
Digital Shoreline Analysis System version 5.0
- Overview
Software for calculating positional boundary change over time
The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS. Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions. It provides an automated method for establishing measurement transects, performs rate calculations, and provides uncertainties associated with rates of change. A user-friendly interface allows the user to complete the workflow for shoreline change analysis.
Suggested citation:
Himmelstoss, E.A., Henderson, R.E., Farris, A.S., Kratzmann, M.G., Bartlett, M.K., Ergul, A., McAndrews, J., Cibaj, R., Zichichi, J.L., and Thieler, E.R., 2024, Digital Shoreline Analysis System version 6.0: U.S. Geological Survey software release, https://doi.org/10.5066/P13WIZ8M.
The existing user guide originally written for DSAS v.5.1 is available and applicable to many aspects of DSAS v.6.0. The user guide has relevant information providing instruction on the DSAS workflow including how to define a reference baseline for measurements, attribute requirements for baselines and shorelines, and supporting information on rate calculations and statistics.
For additional questions please contact DSAS_help@usgs.gov
PLEASE NOTE: The USGS End of Life (EOL) date for ArcMap was February 1, 2024, as there will no longer be software updates and patches released from Esri. ArcMap’s EOL is the primary reason we have developed DSAS v.6.0 as standalone software that will work with any GIS. Due to the timeline constraints, this first-released software version was developed with minimal functionality in mind in order to meet essential user needs. In later development phases, we plan to reinstate capability from v.5 and explore more enhancements. Thank you for understanding!
Current Version
DSAS version 6.0 was released in April 2024 and is publicly available here.
Baseline and shoreline data are prepared in a GIS and converted to .geojson format prior to upload in DSAS. DSAS uses and outputs GeoJSON files which include geospatial and tabular data. Some GIS programs, such as QGIS, can view and edit GeoJSON files directly, and some, like ArcPro require a conversion before they can be viewed. Editing must be done in GIS software.
In version 6.0, only onshore or offshore baselines will be accepted for rate calculation.
Sources/Usage: Public Domain. View Media DetailsIntroduction
Sources/Usage: Public Domain. View Media DetailsDSAS generates transects that are cast perpendicular to the reference baseline to intersect shorelines at a user-specified spacing alongshore. Please note that the figure above illustrates the placement of both onshore and offshore baselines as examples. In DSAS v6.0 all baselines in a file must be placed either offshore or onshore, not combined.
DSAS measures the distance between the baseline and each shoreline intersection along a transect, and combines date information, and positional uncertainty for each shoreline, to generate the following change metrics (see DSAS v.5.1 user guide for more detail):
Distance measurements:
- Shoreline Change Envelope (SCE)
- Net Shoreline Movement (NSM)
Statistics:
- End Point Rate (EPR)
- Uncertainty of the End Point Rate (EPRunc)
- Linear Regression Rate (LRR)
- Confidence Interval (LCI)
- Standard Error (LSE)
- R-squared (LR2)
- Weighted Linear Regression Rate (WLR)
- Confidence Interval (WCI)
- Standard Error (WSE)
- R-squared (WR2)
The results of all calculations are output to a rates file (.geojson) accompanied by an intersects file (.geojson) and associated metadata (.xml). Users also have the option to generate a summary report (.txt).
History
DSAS has been a central component of the U.S. Geological Survey’s Coastal Change Hazards programmatic focus, providing a robust suite of regression rates in a standardized and easily repeatable method that can be executed on large volumes of data collected at a national scale. The DSAS software is intended to facilitate the shoreline change-calculation process and to provide rate-of-change information and the statistical data necessary to establish the reliability of the calculated results.
The software is also suitable for any application that calculates positional change over time, such as assessing change of glacier limits in sequential aerial photos, river edge boundaries, or land-cover changes. National and state governments worldwide have used the tool in support of resource management and critical coastal decision-making.
The DSAS software was originally developed in the early 1990s and has undergone continuous refinement since that time.
- DSAS version 1.0 (1992) was written in the C and awk programming languages for use with the MapGrafix and ArcInfo Geographic Information Systems
- DSAS version 2.0 was written in Avenue for ArcView 3.x
- DSAS version 3.x (ArcGIS 9)
- DSAS version 4.2 (ArcGIS 9.2-9.3.x)
- DSAS version 4.3 (ArcGIS 10.0-10.3)
- DSAS version 4.4 (ArcGIS 10.4 -10.5)
- DSAS version 5.0 - 5.1 (ArcGIS 10.4 - 10.x)
Current version, 6.0, is a standalone application to be used in conjunction with a GIS
- Data
Below are data releases associated with the DSAS project.
National Shoreline Change—A GIS compilation of vector shorelines and associated shoreline change data from the 1800s to 2010s for the coast of California
In coastal areas of the United States, where water and land interface in complex and dynamic ways, it is common to find concentrated residential and commercial development. These coastal areas often contain various landholdings managed by Federal, State, and local municipal authorities for public recreation and conservation. These areas are frequently subjected to a range of natural hazards, whichUSGS National Shoreline Change - A GIS compilation of new lidar-derived shorelines (2010, 2017, and 2018) and associated shoreline change data for coastal South Carolina
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 datUSGS National Shoreline Change — A GIS compilation of vector shorelines and associated shoreline change data for coastal Virginia from the 1840s to 2010s
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 datPuerto Rico shoreline change: A GIS compilation of shorelines, baselines, intersects, and change rates calculated using the Digital Shoreline Analysis system version 5.1 (ver. 2.0, March 2023)
The U.S. Geological Survey (USGS) maintains shoreline positions for the United States coasts from both older sources, such as aerial photographs or topographic surveys, and contemporary sources, such as lidar-point clouds and digital elevation models. These shorelines are compiled and analyzed in the USGS Digital Shoreline Analysis System (DSAS), version 5.1 software to calculate rates of change.A GIS Compilation of Vector Shorelines and Shoreline Classification for Puerto Rico from 1970 and 2010
The U.S. Geological Survey (USGS) maintains shoreline positions for the United States coasts from both older sources, such as aerial photos or topographic surveys, as well as contemporary sources like lidar point clouds and digital elevation models (DEMs). These shorelines are compiled and analyzed in the Digital Shoreline Analysis System (DSAS) software to compute rates of change. It is useful toA GIS Compilation of Vector Shorelines for Puerto Rico from 2015 to 2018
The U.S. Geological Survey (USGS) maintains shoreline positions for the United States coasts from both older sources, such as aerial photographs or topographic surveys, and contemporary sources, such as lidar-point clouds and digital elevation models. These shorelines are compiled and analyzed in the Digital Shoreline Analysis System software to compute their rates of change. Keeping a record of hHistorical Shorelines for Puerto Rico from 1901 to 1987
The U.S. Geological Survey (USGS) maintains shoreline positions for the United States coasts from both older sources, such as aerial photograph or topographic surveys, and contemporary sources, such as lidar-point clouds and digital elevation models. These shorelines are compiled and analyzed in the Digital Shoreline Analysis System software (v5.1) to compute their rates of change. Keeping a recorUSGS National Shoreline Change: A GIS compilation of Updated Vector Shorelines (1800s - 2010s) and Associated Shoreline Change Data for the Georgia and Florida Coasts.
During Hurricane Irma in September 2017, Florida and Georgia experienced significant impacts to beaches, dunes, barrier islands, and coral reefs. Extensive erosion and coral losses result in increased immediate and long-term hazards to shorelines that include densely populated regions. These hazards put critical infrastructure at risk to future flooding and erosion and may cause economic losses. TPreliminary estimates of forecasted shoreline positions and associated uncertainties for Florida and Georgia
During Hurricane Irma, Florida and Georgia experienced substantial impacts to beaches, dunes, barrier islands, and coral reefs. Extensive erosion and coral losses from hurricanes result in increased vulnerability of coastal regions, including densely populated areas. Erosion may put critical infrastructure at risk of future flooding and may cause economic loss. The U.S. Geological Survey (USGS) CoMassachusetts 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
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 1994Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines (1844-2018)
The U.S. Geological Survey, in cooperation with the Massachusetts Office of Coastal Zone Management compiled Massachusetts vector shorelines into an updated dataset for the Office's Shoreline Change Project. The Shoreline Change Project started in 1989 to identify erosion-prone areas of the Massachusetts coast by compiling a database of historical shoreline positions. Trends of shoreline positionMassachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines for the 2018 update
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 1994 shoreline was added to calculate both long- and short-term shoreline change rates at 40-meter intervals along ocean-f - Multimedia
Below are multimedia items associated with this project.
DSAS v6.0 InfographicThe Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS. Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.
The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS. Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.
DSASDSAS generates transects that are cast perpendicular to the reference baseline to intersect shorelines at a user-specified spacing alongshore. Please note that the figure above illustrates the placement of both onshore and offshore baselines as examples. In DSAS v6.0 all baselines in a file must be placed either offshore or onshore, not combined.
DSAS generates transects that are cast perpendicular to the reference baseline to intersect shorelines at a user-specified spacing alongshore. Please note that the figure above illustrates the placement of both onshore and offshore baselines as examples. In DSAS v6.0 all baselines in a file must be placed either offshore or onshore, not combined.
DSAS v6.0 InterfaceThe Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS. Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.
The Digital Shoreline Analysis System (DSAS) version 6 is a standalone application that calculates shoreline or boundary change over time. The GIS of a user’s choice is used to prepare the data for DSAS. Like previous versions, DSAS v.6 enables a user to calculate rate-of-change statistics from multiple historical shoreline positions.
- Publications
The existing user guide originally written for DSAS v.5.1 is available and applicable to many aspects of DSAS v.6.0. The user guide has relevant information providing instruction on the DSAS workflow including how to define a reference baseline for measurements, attribute requirements for baselines and shorelines, and supporting information on rate calculations and statistics.
Digital Shoreline Analysis System (DSAS) version 5.1 user guide
The Digital Shoreline Analysis System version 5 software is an add-in to Esri ArcGIS Desktop version 10.4–10.7 that enables a user to calculate rate-of-change statistics from a time series of vector shoreline positions. The Digital Shoreline Analysis System provides an automated method for establishing measurement locations, performs rate calculations, provides the statistical data necessary to asAuthorsEmily A. Himmelstoss, Rachel E. Henderson, Meredith G. Kratzmann, Amy S. FarrisNational shoreline change—Summary statistics for vector shorelines from the early 1900s to the 2010s for Puerto Rico
The U.S. Geological Survey (USGS) maintains a database of historical shoreline positions for the United States coasts derived from historical sources, such as aerial photographs or topographic surveys, and contemporary sources, such as modern orthophotography, light detection and ranging (lidar) point clouds, and digital elevation models. These shorelines are compiled within a geographic informatiAuthorsRachel E. Henderson, Julia L. Heslin, Emily A. Himmelstoss, Maritza Barreto-OrtaU.S. Geological Survey national shoreline change— Summary statistics for updated vector shorelines (1800s–2010s) and associated shoreline change data for the Georgia and Florida coasts
Rates of shoreline change have been updated for the open-ocean sandy coastlines of Georgia and Florida as part of the U.S. Geological Survey’s Coastal Change Hazards programmatic focus. This work was formerly within the National Assessment of Shoreline Change project. Shorelines were compiled from the original report published in 2005, recent update reports, and additional light detection and rangAuthorsMeredith G. KratzmannDigital Shoreline Analysis System (DSAS) version 5.1 user guide
The Digital Shoreline Analysis System version 5 software is an add-in to Esri ArcGIS Desktop version 10.4–10.7 that enables a user to calculate rate-of-change statistics from a time series of vector shoreline positions. The Digital Shoreline Analysis System provides an automated method for establishing measurement locations, performs rate calculations, provides the statistical data necessary to asAuthorsEmily A. Himmelstoss, Rachel E. Henderson, Meredith G. Kratzmann, Amy S. FarrisThe Digital Shoreline Analysis System (DSAS) Version 4.0 - An ArcGIS extension for calculating shoreline change
The Digital Shoreline Analysis System (DSAS) version 4.0 is a software extension to ESRI ArcGIS v.9.2 and above that enables a user to calculate shoreline rate-of-change statistics from multiple historic shoreline positions. A user-friendly interface of simple buttons and menus guides the user through the major steps of shoreline change analysis. Components of the extension and user guide includeAuthorsE. Robert Thieler, Emily A. Himmelstoss, Jessica L. Zichichi, Ayhan ErgulThe Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS extension for calculating historic shoreline cange
No abstract available.AuthorsE. Robert Thieler, Emily A. Himmelstoss, Jessica L. Zichichi, Tara L. MillerDigital Shoreline Analysis System (DSAS) version 2.0: An ArcView extension for calculating shoreline change
No abstract available.AuthorsE. Robert Thieler, Daniel Martin, Ayhan ErgulHistorical shoreline mapping (II): Application of the Digital Shoreline Mapping and Analysis Systems (DSMS/DSAS) to shoreline change mapping in Puerto Rico
A new, state-of-the-art method for mapping historical shorelines from maps and aerial photographs, the Digital Shoreline Mapping System (DSMS), has been developed. The DSMS is a freely available, public domain software package that meets the cartographic and photogrammetric requirements of precise coastal mapping, and provides a means to quantify and analyze different sources of error in the mappiAuthorsE. Robert Thieler, William W. DanforthHistorical shoreline mapping (I): improving techniques and reducing positioning errors
A critical need exists among coastal researchers and policy-makers for a precise method to obtain shoreline positions from historical maps and aerial photographs. A number of methods that vary widely in approach and accuracy have been developed to meet this need. None of the existing methods, however, address the entire range of cartographic and photogrammetric techniques required for accurate coaAuthorsE. Robert Thieler, William W. DanforthDigital Shoreline Analysis System (DSAS) user's guide; version 1.0
No abstract available.AuthorsWilliam W. Danforth, E. Robert Thieler - Web Tools
National Shoreline Change
Exploring Shoreline Positions of the United States From the 1800s To The Present. This geonarrative explains how the USGS derives shorelines from various data sources, and how shoreline change rates are generated from these data. The Natural Hazards Mission Area programs of the USGS develop and apply hazard science to help protect the safety, security, and economic well-being of the Nation.
Our Coasts
USGS Coastal Change Hazards research provides scientific tools to protect lives, property, and the economic well being of the Nation. The mission of the USGS Coastal Change Hazards Program is to provide research and tools to protect lives, property, and the economic well-being of the Nation. This is a story map that introduces the value of our coasts and the threats they face with global change.
- Software
Below are links to software associated with the DSAS project.
Digital Shoreline Analysis System v5.1
The Digital Shoreline Analysis System version 5.1 software is an add-in to Esri ArcGIS Desktop version 10.4–10.7 that enables a user to calculate rate-of-change statistics from a time series of vector shoreline positions.
Digital Shoreline Analysis System
Digital Shoreline Analysis System version 5.0
- News