LiDAR-based 3D Mapping and Comparison with Conventional 3D GIS
This project demonstrates the generation of high-resolution 3D maps using airborne LiDAR point cloud data and compares them with conventional 3D maps created using standard ArcGIS techniques. The study highlights improvements in elevation accuracy, object representation, and volume estimation achieved through LiDAR data.
The study area is located at the Oregon State University campus, Corvallis, Oregon, USA. The area includes buildings, vegetation, and terrain features suitable for 3D visualization and comparison between LiDAR-based and conventional 3D maps.
The LiDAR-based 3D map accurately represents terrain, buildings, and vegetation with correct height and volume. Tree canopy structure and building shapes are clearly visible, providing a realistic three-dimensional visualization.
The conventional 3D map created using standard ArcGIS methods shows generalized elevation surfaces. Compared to the LiDAR-based map, object shapes and volume representation are less accurate.
The video demonstrates a direct visual comparison between the LiDAR-based 3D map and the conventional 3D map. Differences in elevation accuracy, building geometry, vegetation structure, and overall realism are clearly observable.
This project highlights the advantages of LiDAR data for accurate 3D mapping and spatial analysis. Compared to conventional 3D GIS techniques, LiDAR-based mapping provides superior realism and reliability, supporting advanced visualization and decision-making in GIS applications.