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DSAS v6.0 is a free, stand-alone application that calculates the change of a coastline or boundary over time. The GIS of the user’s choice is used to prepare the data for DSAS. As with previous versions, DSAS v6.0 allows the user to calculate rate-of-change statistics from multiple historical coastline locations. It provides a method to automatically build survey transects, perform rate calculations, and provide the uncertainties associated with the rates of change.
Why change?
Previous versions of DSAS were plug-ins for Esri ArcGIS Desktop. ArcMap will reach mature status in lifecycle support and be retired in March 2026. Starting in March 2024, no software updates and patches will be released for Esri ArcGIS Desktop. As a result, the United States Geological Survey has set February 1, 2024 as the USGS End of Life date for ArcMap. For this reason, DSAS v6.0 was developed as standalone software that can be used with any GIS.
The DSAS development team developed this standalone application rapidly. Time constraints due to resource availability mismatches and the end of life of ArcMap required streamlined development of version 6.0 to meet basic user needs and adopt the basic but reduced functionality of version 5. In a later development phase, which has been funded, plans are in place to restore the functionality of version 5 and explore further enhancements.
Who uses DSAS? What is it used for?
National and state governments, nonprofit organizations, and academia around the world use DSAS to support resource management and critical coastal decision making.
The software is designed to facilitate the shoreline change calculation process and provide rate of change information and statistics to determine the reliability of the calculation results.
DSAS software is also suitable for any application where changes in position over time are calculated, such as assessing changes in glacier boundaries, river margin boundaries, or land cover changes in successive aerial photographs.
For more information, to view sample DSAS data, or to download version 6.0, visit DSAS website.
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