Construction and Accuracy Test of a 3D Model of Non-Metric Camera Images Using Agisoft PhotoScan

This paper aims to provide a method of constructing and testing the accuracy of a three dimensional (3D) model for non-metric camera images using Agisoft PhotoScan to solve the problems regarding large investment, long processing periods and high technical difficulties. On the basis of data pre-processing, this software presents a way of orientating data, extracting point clouds, building Triangulated Irregular Networks (TIN), Digital Elevation Models (DEM) and producing Digital Orthophoto Maps (DOM). From these networks, a 3D model of the research area can be established. The experimental results show a highly precise 3D model can be rapidly established using this method. The construction time is shortened and the relevant investment required to produce the map is reduced. This method is a robust and relatively quick approach to build 3D models which is relevant for many applications.