Lake Tahoe Basin Lidar

Watershed Sciences, Inc. (WSI) collected Light Detection and Ranging (Lidar) data of land surrounding Lake Tahoe from August 11th to August 24th, 2010. The requested area of interest (AOI), excluding the actual lake, was 232,536 acres of delivered lidar data. The lidar survey used two Leica ALS50 Phase II laser systems mounted in a Cessna Caravan 208B. The Leica systems were set to acquire ≥ 83,000 - 105,900 laser pulses per second (i.e., 83 - 105.9 kHz pulse rate) and flown at 900 - 1300 meters above ground level (AGL) depending on weather and terrain, capturing a scan angle of ±14° from nadir. These settings were developed to yield points with an average native pulse density of >8 pulses per square meter over terrestrial surfaces. The resulting average first-return density of delivered dataset is 11.82 points per square meter with an average ground point density of 2.26 points per square meter. The vertical accuracy was estimated at 3.5 cm RMSE. All TRPA lidar data is in the public domain.

Watershed Sciences, Inc.（水系科学公司，简称WSI）于2010年8月11日至8月24日收集了围绕塔霍湖的激光雷达（Lidar）数据。所请求的关注区域（AOI）排除了实际湖泊，包含的激光雷达数据面积为232,536英亩。该激光雷达调查使用了两个安装在塞斯纳卡avan 208B飞机上的Leica ALS50 Phase II激光系统。Leica系统被设置为每秒采集≥83,000至105,900个激光脉冲（即83至105.9 kHz的脉冲速率），并根据天气和地形在900至1300米以上地面高度（AGL）飞行，捕捉到从正下方的±14°扫描角。这些设置旨在产生在陆地表面上的平均原生脉冲密度大于8脉冲每平方米的点。所提供的数据集的平均首次返回密度为每平方米11.82个点，平均地面点密度为每平方米2.26个点。垂直精度估计为3.5厘米均方根误差。所有TRPA激光雷达数据均为公共领域。