DIGITAL SHORELINE ANALYSIS SYSTEM
Automating the measurement and computation processes used to estimate shoreline change
The Digital Shoreline Analysis System is now a web application called DSASweb, which can be accessed online at http://marine.usgs.gov/dsasweb/. Like previous versions of the software, DSASweb computes rate metrics from multiple historical shoreline positions. It is also useful for computing rates of change for just about any other moving boundary that incorporates a clearly-identified feature position at discrete times, such as riverbanks, land-use boundaries, or seafloor features.
Users are able to upload their own shoreline and baseline data as zipped shapefiles. DSASweb provides tools and instruction for drawing a reference baseline, generating measurement transects and computing the rate-of-change metrics.
The current web version is 1.0.9
If you use DSASweb, please cite the application as follows:
Development on this web application is ongoing. The web-based version currently provides access to a selection of shoreline positional data published by the U.S. Geological Survey as part of the National Assessment of Shoreline Change Project.
As DSASweb continues to develop and improve, additional data and options will be added.
A public bulletin board for users to exchange tips and techniques with other DSAS users is available here.
The DSAS software was originally developed in the early 1990’s and has undergone continuous, albeit episodic refinement. 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) and DSAS version 4.3.4730 (ArcGIS 10) were written in VB.NET using the ArcObjects Object Library for ArcGIS.
Each version of DSAS includes many improvements that are described in the documentation. Typically, we concentrate our efforts on improving the rate-of-change statistics and the user interface.
Previous Versions (unsupported)
The DSAS version 4.3.4730 for ArcGIS 10 is available here. That link also provides an option to download DSAS version 4.2 for ArcGIS 9.x. Please note that DSAS version 4.2 is not compatible with Windows 7 operating systems.
If you use DSAS version 4.x, please cite the following publication:
UNINSTALL PATCH FOR DSAS version 4.x
DSAS transects created in the previous DSAS version 2x (for ArcView 3.x) can now be imported for use in DSAS version 4 using the stand-alone utility available for download at http://woodshole.er.usgs.gov/project-pages/dsas/Transect_converter/DSAS_convert_transects.zip
The DSAS 3.0 is available at http://woodshole.er.usgs.gov/project-pages/dsas/version3 and should be cited as:
The DSAS 2.0 is available at http://woodshole.er.usgs.gov/project-pages/dsas/version2 and should be cited as:
The original DSAS version 1.0 is documented here http://pubs.er.usgs.gov/pubs/ofr/ofr92355 and should be cited as:
Thieler, E.R., and Danforth, W.W., 1994. Historical shoreline mapping (I): improving techniques and reducing positioning errors. Journal of Coastal Research, v. 10, no. 3, p. 549-563.
Thieler, E.R., and Danforth, W.W., 1994. Historical shoreline mapping (II): application of the Digital Shoreline Mapping and Analysis Systems (DSMS/DSAS) to shoreline change mapping in Puerto Rico. Journal of Coastal Research, v. 10, no. 3, p. 600-620.
These pages are provisional and contain computer applications or scripts that may be changed without notice as new versions or revisions of the material are created. Although this program has been used by the USGS, no warranty, expressed or implied, is made by the USGS or the United States Government as to the accuracy and functioning of the program and related program material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith.