DIGITAL SHORELINE ANALYSIS SYSTEM
Computer Software for Calculating Shoreline Change (and other problems dealing with the positional change of a boundary over time)
The Digital Shoreline Analysis System (DSAS) is computer software that computes rate-of-change statistics from multiple historic shoreline positions residing in a GIS. It is also useful for computing rates of change for just about any other boundary change problem that incorporates a clearly-identified feature position at discrete times.
The DSAS software is freely available.
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:
A public bulletin board for users to exchange tips and techniques with other DSAS users is available here.
In DevelopmentDevelopment on a web application version of DSAS, called DSASweb, is ongoing. There is not a publicly-available version at this time. If you have questions about DSASweb, please contact DSAS_help@usgs.gov.
Uninstall patch for DSAS version 4.x
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 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.