VA Bias_Feature – Feature class containing Virginia proxy-datum bias information to be used in the Digital Shoreline Analysis System.

Geological Survey (USGS) has compiled national shoreline data for more than 20 years to document coastal change and serve the needs of research, management, and the...美国地质调查局（Geological Survey, USGS）已汇编二十余年的全国海岸线数据，用于记录海岸变化，并满足科研、管理及相关领域的需求。