研究目的
To evaluate the performance of a personal MLS system that integrates a low-cost, lightweight laser scanner in a topographically complex environment, at the reach scale, and to assess whether observations can be used to estimate surface grain size.
研究成果
Personal MLS offers similar vertical errors to static TLS and enables rapid acquisition of point cloud data where terrain is navigable by foot. It can be used to map surface sedimentology, adding to the choice of methods for acquiring hyperscale data in geomorphology.
研究不足
Terrain must be navigable within the scanner range of the target area; soft ground, spiky and/or thick vegetation and deep water pose challenges. Personal MLS will need to be fused with direct or indirect bathymetric survey techniques to acquire data in inundated areas.
1：Experimental Design and Method Selection:
The study compared a personal MLS survey using a Leica Pegasus Backpack with Velodyne Puck VLP-16 sensors and a multi-station static TLS survey using a Riegl VZ-1000 scanner to produce Digital Elevation Models (DEMs) and surface sedimentology maps.
2：Sample Selection and Data Sources:
A 500 m long reach of the braided River Feshie was chosen for its complex relief and spatially variable grain size.
3：List of Experimental Equipment and Materials:
Leica Pegasus Backpack, Velodyne Puck VLP-16 sensors, Riegl VZ-1000 scanner, RTK-GNSS for check points.
4：Experimental Procedures and Operational Workflow:
The personal MLS survey involved navigating the terrain at a steady walking pace in a sequence of loops, while the TLS survey involved setting up 26 scanning stations with overlapping scans.
5：Data Analysis Methods:
Data were processed using Novatel Inertial Explorer software, Leica Pegasus Automatic Processing software, Cyclone software, and TopCAT software for statistical summaries of topographic variability.
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