Investigation on Different Scanning Resolutions for Slope Mapping Studies in Cameron Highlands, Malaysia

Abstract

The development of laser scanning is one of the surveying methods, which able to produce a digital surface in a short period. The good results of digital surface must be followed by specific procedures, for example, interpolation algorithm and filtering methods. The improvement in information technology has influenced the growing development and application of laser scanning technique in order to fulfill the user needs. Laser scanning resolution might have an effect on the results of slope mapping studies. The objective of this paper is to evaluate the results of different laser scanner resolutions in producing a slope map. This study was conducted at Cameron Highlands, Pahang, Malaysia. Two site locations were identified for this study due to the condition of the slope characteristics that provides a more accurate assessment. Topcon GLS1500 is being used for data collection at both sites, and several control points were established using real-time kinematic global positioning system. The storage of point clouds was increased when the resolution value is decreased. The results of laser scanner were analyzed based on different laser scanner resolutions. It can be concluded that laser scanner resolutions do have an effect on slope mapping accuracies. Determination of the appropriate resolution for specific applications can be identified in this study.