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#           Digital Shoreline Analysis System (DSAS)      

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      By Woods Hole Coastal and Marine Science Center      April 1, 2024    

            -                Overview             
            -                Data             
            -                Multimedia             
            -                Publications             
            -                Web Tools             
            -                Software             
            -                News             

**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.

### DSAS Software

DSAS software is used to calculate shoreline or boundary change over time. To download the free standalone software, click below:

Download Software

### Sample Data

Load sample data to explore DSAS version 6.0. To download free sample data, click below:

Download Sample Data

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.

View Media Details

## **Introduction**

View Media Details

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

### Contacts

#### Rachel Elizabeth Henderson

##### Physical Scientist

Woods Hole Coastal and Marine Science Center

rehenderson@usgs.gov

#### Amy S Farris

##### Oceanographer

Woods Hole Coastal and Marine Science Center

afarris@usgs.gov

508-457-2344

#### Emily A Himmelstoss

##### Associate Program Coordinator for Science

Coastal and Marine Hazards and Resources Program

ehimmelstoss@usgs.gov

508-457-2262

#### Meredith Kratzmann

#####            Scientist III, Woods Hole Coastal and Marine Science Center          

mkratzmann@contractor.usgs.gov

### Explore Search

                      - Coastal Change Forecasts
                      - Coastal Processes
                      - Coastal Vulnerability Assessments
                      - Evolution of Coastal Margins
                      - Modeling
                      - Sea-Level Rise
                      - Storm Impacts
                      - Coastal Erosion
                      - Coastal Margins
                      - Forecasts and Models
                      - Storm Impacts
                      - Coastal Ecosystem Science
                      - Capabilities
                      - Coastal Change
                      - Hazards
                      - Hazards
                      - Coastal Change
                      - Coastal Change Hazards
                      - Coastal Elevation Data and Mapping
                      - Analysis and Processing
                      - Coastal Evolution
                      - Coastal Restoration
                      - Coastal Vulnerability
                      - Coasts
                      - Information Systems
                      - Maps and Mapping
                      - Methods and Analyses
                      - Science Technology
                      - shoreline analysis
                      - coasts
                      - coastal processes
                      - coastal hazards
                      - sea-level change
                      - Sea-Level Rise
                      - shoreline change
                      - forecasts and models
                      - Oceans

View All **

Below are data releases associated with the DSAS project.

January 25, 2024

####                 National Shoreline Change—A GIS compilation of vector shorelines and associated shoreline change data from the 1800s to 2010s for the coast of California              

Woods Hole Coastal and Marine Science Center

August 15, 2023

####                 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              

Woods Hole Coastal and Marine Science Center

May 30, 2023

####                 USGS National Shoreline Change — A GIS compilation of vector shorelines and associated shoreline change data for coastal Virginia from the 1840s to 2010s              

Woods Hole Coastal and Marine Science Center

November 19, 2021

####                 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)              

Woods Hole Coastal and Marine Science Center

November 19, 2021

####                 A GIS Compilation of Vector Shorelines and Shoreline Classification for Puerto Rico from 1970 and 2010              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

November 19, 2021

####                 A GIS Compilation of Vector Shorelines for Puerto Rico from 2015 to 2018              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

November 19, 2021

####                 Historical Shorelines for Puerto Rico from 1901 to 1987              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

September 29, 2021

####                 USGS National Shoreline Change: A GIS compilation of Updated Vector Shorelines (1800s - 2010s) and Associated Shoreline Change Data for the Georgia and Florida Coasts.              

Woods Hole Coastal and Marine Science Center

September 28, 2021

####                 Preliminary estimates of forecasted shoreline positions and associated uncertainties for Florida and Georgia              

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

September 1, 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              

Woods Hole Coastal and Marine Science Center

September 1, 2021

####                 Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines (1844-2018)              

Woods Hole Coastal and Marine Science Center

December 7, 2018

####                 Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines for the 2018 update              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

Below are multimedia items associated with this project.

DSAS v6.0 Infographic

April 1, 2024

#### DSAS v6.0 Infographic

link

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.

Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

April 1, 2024

#### DSAS v6.0 Infographic

link

#### DSAS v6.0 Infographic

link

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.

Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

DSAS

April 1, 2024

#### DSAS

link

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.

Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

April 1, 2024

#### DSAS

link

#### DSAS

link

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.

Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

DSAS v6.0 Interface

April 1, 2024

#### DSAS v6.0 Interface

link

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.

Woods Hole Coastal and Marine Science Center

April 1, 2024

#### DSAS v6.0 Interface

link

#### DSAS v6.0 Interface

link

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.

Woods Hole Coastal and Marine Science Center

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.

Version 5.1 User Guide

November 9, 2021

####                 Digital Shoreline Analysis System (DSAS) version 5.1 user guide              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

April 12, 2024

####                 National shoreline change—Summary statistics for vector shorelines from the early 1900s to the 2010s for Puerto Rico              

Woods Hole Coastal and Marine Science Center

May 6, 2022

####                 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              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

November 9, 2021

####                 Digital Shoreline Analysis System (DSAS) version 5.1 user guide              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

June 12, 2009

####                 The Digital Shoreline Analysis System (DSAS) Version 4.0 - An ArcGIS extension for calculating shoreline change              

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

November 5, 2005

####                 The Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS extension for calculating historic shoreline cange              

Woods Hole Coastal and Marine Science Center

June 1, 2003

####                 Digital Shoreline Analysis System (DSAS) version 2.0: An ArcView extension for calculating shoreline change              

Woods Hole Coastal and Marine Science Center

January 1, 1994

####                 Historical shoreline mapping (II): Application of the Digital Shoreline Mapping and Analysis Systems (DSMS/DSAS) to shoreline change mapping in Puerto Rico              

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

January 1, 1994

####                 Historical shoreline mapping (I): improving techniques and reducing positioning errors              

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

January 1, 1992

####                 Digital Shoreline Analysis System (DSAS) user's guide; version 1.0              

Woods Hole Coastal and Marine Science Center

June 17, 2020

####                 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.

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Hurricanes

June 17, 2020

####                 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.

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Hurricanes

Below are links to software associated with the DSAS project.

DSAS v6.0 Software

November 30, 2021

####                 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.

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

January 31, 2019

####                 Digital Shoreline Analysis System              

Digital Shoreline Analysis System version 5.0

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

Digital Shoreline Analysis System (DSAS) Update

April 22, 2024

####   Digital Shoreline Analysis System (DSAS) Update

With Esri ArcMap beginning its descent into retirement, the Digital Shoreline Analysis System (DSAS) version 6.0 was developed as a standalone...

Read Article

**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.

### DSAS Software

DSAS software is used to calculate shoreline or boundary change over time. To download the free standalone software, click below:

Download Software

### Sample Data

Load sample data to explore DSAS version 6.0. To download free sample data, click below:

Download Sample Data

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.

View Media Details

## **Introduction**

View Media Details

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

### Contacts

#### Rachel Elizabeth Henderson

##### Physical Scientist

Woods Hole Coastal and Marine Science Center

rehenderson@usgs.gov

#### Amy S Farris

##### Oceanographer

Woods Hole Coastal and Marine Science Center

afarris@usgs.gov

508-457-2344

#### Emily A Himmelstoss

##### Associate Program Coordinator for Science

Coastal and Marine Hazards and Resources Program

ehimmelstoss@usgs.gov

508-457-2262

#### Meredith Kratzmann

#####            Scientist III, Woods Hole Coastal and Marine Science Center          

mkratzmann@contractor.usgs.gov

### Explore Search

                      - Coastal Change Forecasts
                      - Coastal Processes
                      - Coastal Vulnerability Assessments
                      - Evolution of Coastal Margins
                      - Modeling
                      - Sea-Level Rise
                      - Storm Impacts
                      - Coastal Erosion
                      - Coastal Margins
                      - Forecasts and Models
                      - Storm Impacts
                      - Coastal Ecosystem Science
                      - Capabilities
                      - Coastal Change
                      - Hazards
                      - Hazards
                      - Coastal Change
                      - Coastal Change Hazards
                      - Coastal Elevation Data and Mapping
                      - Analysis and Processing
                      - Coastal Evolution
                      - Coastal Restoration
                      - Coastal Vulnerability
                      - Coasts
                      - Information Systems
                      - Maps and Mapping
                      - Methods and Analyses
                      - Science Technology
                      - shoreline analysis
                      - coasts
                      - coastal processes
                      - coastal hazards
                      - sea-level change
                      - Sea-Level Rise
                      - shoreline change
                      - forecasts and models
                      - Oceans

View All **

Below are data releases associated with the DSAS project.

January 25, 2024

####                 National Shoreline Change—A GIS compilation of vector shorelines and associated shoreline change data from the 1800s to 2010s for the coast of California              

Woods Hole Coastal and Marine Science Center

August 15, 2023

####                 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              

Woods Hole Coastal and Marine Science Center

May 30, 2023

####                 USGS National Shoreline Change — A GIS compilation of vector shorelines and associated shoreline change data for coastal Virginia from the 1840s to 2010s              

Woods Hole Coastal and Marine Science Center

November 19, 2021

####                 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)              

Woods Hole Coastal and Marine Science Center

November 19, 2021

####                 A GIS Compilation of Vector Shorelines and Shoreline Classification for Puerto Rico from 1970 and 2010              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

November 19, 2021

####                 A GIS Compilation of Vector Shorelines for Puerto Rico from 2015 to 2018              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

November 19, 2021

####                 Historical Shorelines for Puerto Rico from 1901 to 1987              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

September 29, 2021

####                 USGS National Shoreline Change: A GIS compilation of Updated Vector Shorelines (1800s - 2010s) and Associated Shoreline Change Data for the Georgia and Florida Coasts.              

Woods Hole Coastal and Marine Science Center

September 28, 2021

####                 Preliminary estimates of forecasted shoreline positions and associated uncertainties for Florida and Georgia              

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

September 1, 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              

Woods Hole Coastal and Marine Science Center

September 1, 2021

####                 Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines (1844-2018)              

Woods Hole Coastal and Marine Science Center

December 7, 2018

####                 Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines for the 2018 update              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

Below are multimedia items associated with this project.

DSAS v6.0 Infographic

April 1, 2024

#### DSAS v6.0 Infographic

link

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.

Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

April 1, 2024

#### DSAS v6.0 Infographic

link

#### DSAS v6.0 Infographic

link

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.

Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

DSAS

April 1, 2024

#### DSAS

link

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.

Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

April 1, 2024

#### DSAS

link

#### DSAS

link

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.

Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

DSAS v6.0 Interface

April 1, 2024

#### DSAS v6.0 Interface

link

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.

Woods Hole Coastal and Marine Science Center

April 1, 2024

#### DSAS v6.0 Interface

link

#### DSAS v6.0 Interface

link

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.

Woods Hole Coastal and Marine Science Center

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.

Version 5.1 User Guide

November 9, 2021

####                 Digital Shoreline Analysis System (DSAS) version 5.1 user guide              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

April 12, 2024

####                 National shoreline change—Summary statistics for vector shorelines from the early 1900s to the 2010s for Puerto Rico              

Woods Hole Coastal and Marine Science Center

May 6, 2022

####                 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              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

November 9, 2021

####                 Digital Shoreline Analysis System (DSAS) version 5.1 user guide              

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

June 12, 2009

####                 The Digital Shoreline Analysis System (DSAS) Version 4.0 - An ArcGIS extension for calculating shoreline change              

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

November 5, 2005

####                 The Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS extension for calculating historic shoreline cange              

Woods Hole Coastal and Marine Science Center

June 1, 2003

####                 Digital Shoreline Analysis System (DSAS) version 2.0: An ArcView extension for calculating shoreline change              

Woods Hole Coastal and Marine Science Center

January 1, 1994

####                 Historical shoreline mapping (II): Application of the Digital Shoreline Mapping and Analysis Systems (DSMS/DSAS) to shoreline change mapping in Puerto Rico              

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

January 1, 1994

####                 Historical shoreline mapping (I): improving techniques and reducing positioning errors              

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

January 1, 1992

####                 Digital Shoreline Analysis System (DSAS) user's guide; version 1.0              

Woods Hole Coastal and Marine Science Center

June 17, 2020

####                 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.

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Hurricanes

June 17, 2020

####                 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.

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, St. Petersburg Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Hurricanes

Below are links to software associated with the DSAS project.

DSAS v6.0 Software

November 30, 2021

####                 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.

Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

January 31, 2019

####                 Digital Shoreline Analysis System              

Digital Shoreline Analysis System version 5.0

Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

Digital Shoreline Analysis System (DSAS) Update

April 22, 2024

####   Digital Shoreline Analysis System (DSAS) Update

With Esri ArcMap beginning its descent into retirement, the Digital Shoreline Analysis System (DSAS) version 6.0 was developed as a standalone...

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