|2005 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Lower Columbia River
||Terrapoint, on behalf of multiple agencies, collected topographic lidar of the Lower
Columbia River area. Field data collection took place between the dates of January
10th and February 20th, 2005. The control network and checkpoint surveys were performed
from January 4th to February 12th, 2005. The project area covers approximately 890
square miles along the Columbia River, from the Bonneville Dam to the Pacific Ocean.
A total of 431 flightlines were required to cover the project area flightlines. Terrapoint
used a 40 kHz Airborne Laser Terrain Mapping System ALTMS sensor attached to a Navajo
Twin-engin aircraft (C-FVZM). The mission was flown at 3500 feet above ground level
at an average speed of 140 knots. The system consists of a 36 degree full scan angle
laser, a Trimble 4700 GPS receiver and a Honeywell H764 IMU unit. The nominal flightline
spacing was 1070 feet with 30 to 50% sidelap. The surveyed and processed data was
received divided by funding agency. The agency responsible for funding each tile is
represented as a number (0:COE, 1:DNR, 2:DOGAMI, 3:DOI) in the "User Data" field of
each LAS file.