Generating Orthomosaic Imagery and Terrain Models in LiMapper
LiMapper is an aerial photogrammetry software which can reconstruct 3D geometry structure from overlapping images and subsequently generate a series of standard products of surveying and mapping, such as orthomosaic imagery, DEMs (Digital Elevation Model), DSMs (Digital Surface Model), and dense point clouds. LiMapper’s state-of-the-art photogrammetry and computer vision algorithms fully exploit hardware resources such as multi-core CPU and high-performance GPU to provide high efficiency and robust performance. In addition, the algorithms are optimized to handle not only traditional aerial images of large frames, but also UAV-images with unstable orientations and unknown lens distortions. Furthermore, the software interface is kept simple and easy to use for both new and experienced users.
In this tutorial, you will be introduced with the detailed workflow of generating orthomosaic and terrain models using aerial imageries as input. Steps will also be taken to adding GCPs and thereby evaluate and improve the absolute accuracy of LiMapper outputs.
Software Download & Install
LiMapper software is included in the LiDAR360 Suite. Please download the latest version of LiDAR360 Suite from the GreenValley International official website, and install and activate following the User Guide.