2016 Lidar Project - SBET - Sensor Location, Time and Date

For more information about this layer please see the GIS Data Catalog. Simplified 2016 King County Lidar Project SBET data. SBET means Smoothed Best Estimate of Trajectory. This data is used by the vendor with the lidar returns data to create the LAS file. This original SBET data was simplified by removing attributes, leaving just those attributes relating to the location, time and date of the aircraft sensor. This data serves as an index to the date and time the lidar data was collected for a given area. Data was processed in reference to NAD83 (CORS96), however the horizontal datum for this dataset is defined as NAD83 (HARN) as the difference is generally small and allows for greater ease of use with data in different datums. The vertical datum is NAVD88, Geoid 03, and the data is projected in Washington State Plane North. Units are in US Survey Feet. Quantum Spatial collected the PSLC King County LiDAR Delivery 4, Block 1 LiDAR data for the Puget Sound LiDAR Consortium between 02/24/16 and 05/25/17.如需了解该图层的详细信息，请查阅地理信息系统（GIS）数据目录。本数据为2016年金县激光雷达（Lidar）项目的简化版SBET数据。SBET（Smoothed Best Estimate of Trajectory）即轨迹平滑最优估计。该数据由供应商与激光雷达回波数据配合使用，用于生成LAS文件。此原始SBET数据通过移除属性字段进行简化，仅保留与机载传感器位置、时间及日期相关的属性。该数据可作为特定区域激光雷达数据采集日期与时间的索引。本数据基于NAD83（CORS96）进行处理，但本数据集的水平基准定义为NAD83（HARN）——由于二者差值通常极小，且可更便捷地与不同基准下的数据配合使用。垂直基准为NAVD88、大地水准面03，数据投影采用华盛顿州平面北坐标系，单位为美国测量英尺（US Survey Feet）。Quantum Spatial于2016年2月24日至2017年5月25日期间，为普吉特湾激光雷达联盟（Puget Sound LiDAR Consortium）采集了PSLC金县激光雷达交付件4、区块1的激光雷达数据。