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.

本数据集涵盖内布拉斯加沙丘（Nebraska Sand Hills）区域的地下水位数据。地下水位数据通过激光雷达（LIDAR）观测结合湖泊水位数据推导得到，采用北美垂直基准面1988（NAVD88）与北美水平基准面1983第14带（NAD83 Zone 14）作为垂直与水平基准。泛克里金（Universal Kriging, UK）栅格与等值线图用于表征区域地下水位分布，而外部趋势克里金（Kriging with an external drift, KED）则用于刻画水位的局地变化特征。已针对制图伪影对等值线进行了清理。