Sediment and Aquifer Characteristics of Quaternary Sediments in the Glaciated Conterminous United States

The Sediment and Aquifer Characteristics dataset includes two, grid-based polygon feature classes. The first class uses a five-kilometer grid to show the density of...沉积物与含水层特征数据集（Sediment and Aquifer Characteristics Dataset）包含两类基于网格的多边形要素类。第一类采用5公里网格，用以展示……的密度