Development of a Bare Ground DEM and Canopy Layer in Northwest Forestlands Using High-Performance LIDAR

Author: Mike Renslow
Organization: Spencer B. Gross, Inc.

331 West 13th Ave #E
Eugene, OR 97401
USA

Phone: 541-485-1721
Fax: 541-485-1549
mike@sbgmaps.com

Light Detection and Ranging (LIDAR) data sets for forest evaluation are characterized by systematic data collection using a high-performance photogrammetric laser pulsing system; the capability to record multiple returns; and the capacity to collect, manage, and store remarkably large data files. Quality assurance of the raw data based on accepted accuracy measurement techniques is critical before postprocessing of the data can begin.

Substantial efforts in postprocessing LIDAR for northwest forestry applications have demonstrated the value of the technology for delineation of the bare ground (DEM) and the canopy layer. This paper presents current results of assessments of accurate, multireturn LIDAR data, quantifying the results to determine forest conditions. The results will be presented with effectual graphics in an ArcView GIS environment to communicate the usefulness of LIDAR for forest assessment and data applications.