Generating Orthomosaic Imagery and Terrain Models in LiMapper

Introduction

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 to the detailed workflow of generating orthomosaic and terrain models using aerial imageries as input, and adding GCPs for improving absolute positioning accuracy and check points for accuracy assessment.

Software Download & Install

LiMapper software is included in the GreenValley Suite. Please download the latest version of GreenValley Suite from the GreenValley International official website, and install and activate following instructions in the User Guide.