Width of back-barrier salt marshes on the coast of Virginia 2010

Backbarrier marsh widths observed from remote sensing of satellite imagery for each of the following islands: Smith, Myrtle, Ship Shoal, Wreck, Cobb, Hog, Paramore, Cedar, Metompkin, and Assawoman Islands. Backbarrier marsh is defined for the purposes of this dataset as those marshes that are connected in a straight line to the barrier island without being interrupted by open water (Open water does not include channels of widths less than 50m). ASTER satellite imagery used for this analysis was acquired from the USGS Global Visualization Viewer web portal (http://glovis.usgs.gov/) (Scene L1B_00305152004155804_2010120215, 2010). Measurements are made every 15m along shore-perpendicular transects. No measurements are made within 1,000m of island "tips" to avoid tidal inlet effects.