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Changes to the coastline and to coastal features, such as spits, barrier islands, estuaries, tidal guts and lagoons were mapped for over 22,000 km of coastline along the Bering Sea and Gulf of Alaska coasts in western Alaska. Changes to rivers and lakes near the coast were also captured. The analysis was based on time-series analysis of Landsat imagery, 1972–2013. An annual time-series of suitable Landsat imagery was compiled and analyzed for changes in near-infrared reflectance to identify areas that transitioned from land to water, or vice-versa, over the study period. The timing of changes was also identified. Thousands of coastal changes over the 42-year study period exceeded the 60-m pixel resolution of the...
The U.S. Geological Survey Gap Analysis Program (GAP) provides access to information about GAP through the GAP Web site http://gapanalysis.usgs.gov/. The Publications page of this Web site contains information about GAP publications http://gapanalysis.usgs.gov/publications/.
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    map background search result map search result map Extensive mapping of Bering Sea and Gulf of Alaska coastal change by Landsat time series analysis, 1972–2013 Extensive mapping of Bering Sea and Gulf of Alaska coastal change by Landsat time series analysis, 1972–2013