Journal Name:
- European Journal of Forest Engineering
Abstract (2. Language):
We developed an algorithm that was designed to create a spatial database of a forested transportation network
using aerial LiDAR. The algorithm uses two main attributes, LiDAR intensity values and ground return density.
The road extraction process was developed using aerial LiDAR from McDonald-Dunn Research Forest near
Corvallis, Oregon, U.S.A. The road extraction process requires X, Y, Z coordinates, intensity values, canopy
type, and the maximum road grade. To compare the results of the process, nine road segments were field
surveyed with terrestrial LiDAR. The result of the road extraction process resulted in 80% true positives, 34%
false positives, 20% false negatives, and 38% true negatives in identifying forest roads. The average absolute
value difference in the road width between the two data sets were 1.1m, while the cut/fill slope differences were
minimal (> 4%) and the difference in road cross slope was two percent. These results were comparable with
other published studies that examined differences between LiDAR measurements and field measurements.
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