Salt Marsh

These digital data files are records of salt marsh location and extent as defined by the U.S. Fish & Wildlife Service's National Wetlands Inventory (NWI) program....本批数字化数据文件记录了由美国鱼类及野生动物管理局（U.S. Fish & Wildlife Service）国家湿地清查（National Wetlands Inventory, NWI）项目所界定的盐沼的位置与分布范围。