National-Scale Grid to Support Regional Groundwater Availability Studies and a National Hydrogeologic Database

The National Hydrogeologic Grid (NHG) dataset includes a raster and vector representation of 1-km cells defining a uniform grid that encompasses the continental...国家水文地质网格（National Hydrogeologic Grid, NHG）数据集包含由1公里栅格单元构建的统一网格的栅格与矢量表达形式，该网格覆盖大陆区域……