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Historical shoreline traces of Lake Sharpe near Lower Brule, South Dakota, 1966–2010


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Thompson, R.F., 2018, Historical shoreline traces of Lake Sharpe near Lower Brule, South Dakota, 1966–2010: U.S. Geological Survey data release,


The 1966 USGS 7.5 minute quadrangle map and aerial imagery available for the years of 1991, 2004, 2005, 2006, 2008, and 2010 was used to trace the shoreline of Lake Sharpe near Lower Brule, South Dakota. The Heads-up digitizing in ArcMap was used to trace shorelines from the 1966 quadrangle map and the aerial imagery. The resulting shoreline trace lines were saved in shapefile format. This work was completed by the U.S. Geological Survey in cooperation with the Lower Brule Sioux Tribe Environmental Protection Office.


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The shoreline traces were digitized to allow for comparison of the shoreline location over time. The data can be displayed using Geographic Information System software to visualize shoreline retreat. The data may also be used to estimate shoreline erosion occurring between imagery dates. Monitoring shoreline erosion allows erosion rates to be estimated or determined. This is important in identifying areas where infrastructure may be at risk, and can help inform decisions on erosion countermeasures.



  • USGS Dakota Water Science Center



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