
In September 2013, WSI, a Quantum Spatial company (QSI), was contracted by the Puget Sound LiDAR Consortium (PSLC) to collect Light Detection and Ranging (LiDAR) data for three areas of interest (AOIs) in the greater Seattle, Washington area. The individual AOIs include the Cedar River Watershed and Floodplain, Lake Youngs Reservoir, and the SCL/Tolt Reservoir, herein all referred to as the Cedar Watershed LiDAR project. Data were collected to aid PSLC in assessing the topographic and geophysical properties of the study area.
On April 11, 2014, a section of the SCL/Tolt Reservoir AOI (Delivery 1) was delivered to the PSLC. This report accompanies the remaining section of the SCL/Tolt Reservoir AOI, the Cedar River Watershed AOI, and the Lake Youngs Reservoir AOI, all collectively referred to as Delivery 2. Included are Delivery 2 contract specifications, data acquisition procedures, processing methods, and analysis of the complete and final dataset including LiDAR accuracy and density.
The average first-return density of LiDAR data for the Cedar Watershed LiDAR project was 1.15 points/ft^2 (12.41 points/m2) while the average ground classified density was 0.25 points/ft^2 (2.67 points/m^2. Presented in the lidar report are the spatial distribution of average first return densities and ground return densities for each 30 m by 30 m cell.
This data set is an LAZ (compressed LAS) format file containing LIDAR point cloud data.