Authors: D. Jonas, J. Walsh, N. Mathews
MAPASIA 2005, Jakarta, August 22-25, 2005
Abstract
Airborne Laser Scanning (ALS) is a broad-acre mapping tool eminently suited to the characteristics of South East Asia. The survey technique can acquire huge quantities of accurate spatial data: quickly, under cloud, under vegetation, in remote or urban areas. The paper presents three recent and diverse Case Studies from SE Asia. A large forestry project currently underway is seeking to define the terrain and timber canopy over huge tracts of rural country. The goal is to define the terrain under dense timber to allow efficient planning of extraction techniques, haul roads and drainage buffers. The canopy model will be used to help predict timber volumes. The second Case Study relates a mining project where an accurate terrain model was acquired, processed and delivered in a remarkably short period of time. The project was in a dense tropical region of SE Asia where significant ground access or photogrammetry would have been very problematic. The third Case Study involves a survey of a recent electricity transmission line that ran between two highly populated urban areas. ALS provided a viable methodology to define the terrain and transmission lines in a single pass of the aircraft. Analysis of the collected data provided clearance reports and line loading parameters for these major electricity transmission lines.
