Abstract

Since the 2000s, 3D maps have been created by using 2D maps covering on the DEM. Objects on the terrain are 3D symbols which attached with realistic images. By doing so, it takes a lot of time and effort to come up with a seen similar with the fact. Currently, the use of unmanned aerial vehicles (UAV) for 2D mapping have been applied effectively in Viet Nam. UAV with lightweight characteristic and combined the GPS, high-resolution digital cameras can capture images in many angles; Along with the image processing softwares has the Structure-from motion (SfM) algorithm to restore automatically the actual models of all objects on the ground. Consequently, it is possible to create 3D maps automatically, to reduce the time buildding 3D models of objects.