Shoreline and Upland/Marsh data for Hog Island, VA 1852-2001
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https://portal.edirepository.org/nis/mapbrowse?packageid=knb-lter-vcr.48.23
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资源简介：
Shorelines and upland/marsh boundaries from National Ocean Survey maps (1852, 1871, 1910, 1919,), aerial photos (1943, 1967, 1980, 1990), and satellite TM scene (1993). Update: John Porter added 2001 based on digitization of a 10/15/2001 IKONOS satellite image. The high tide line was digitized on the beach based on the edge of the wetted sand. For the marsh, the marsh-lagoon border was digitized. The upland/marsh boundary is not included for 2001. This is dataset has been superceded by dataset VCR01078, which includes a combined shapefile for all shorelines from all years.
提供机构：
Environmental Data Initiative
