North American Grid-Based Sampling Frame: Continental United States at a 10x10km resolution

This sampling frame is a set of grid-based finite-area frames spanning Canada, the United States, and Mexico. The grid for the United States is broken into individual...本抽样框为覆盖加拿大、美国及墨西哥的一系列基于网格的有限区域框架。其中美国所对应的网格被拆分为若干独立……