Groundwater level in Nebraska Sand Hills using LIDAR-derived lake water level (contours and raster).

The data represents the groundwater level in the Nebraska Sand Hills. The groundwater level were derived using the lake water level using LIDAR observations. The groundwater level are in NAVD88 vertical datum and NAD83 Zone 14 horizontal datum. The Universal Kriging (UK) raster and contour represents the regional groundwater level while Kriging with an external drift (KED) represents local variation in water level. The contours are cleaned for artifacts.

本数据集所呈现者为内布拉斯加州沙丘地区的地下水位信息。地下水位数据通过结合湖泊水位及激光雷达观测数据所得。所采用的地下水位基准为NAVD88垂向基准及NAD83第14区水平基准。其中，采用通用克里金法（Universal Kriging, UK）生成的栅格数据和等高线反映了该区域的地下水位分布，而外部漂移克里金法（Kriging with an external drift, KED）则展示了地下水位在局部区域的变化情况。等高线已进行去噪处理。