This paper describes a new approach for monitoring the construction progress of the Urban Railway Construction Project “Metro line1 - Ben Thanh - Suoi Tien” by using Unmanned Aerial Vehicles (UAV) to capture high resolution imagery at different stages of the project. The advantage of the AscTec Falcon 8 systems lies in their high flexibility and efficiency in capturing the surface of an area from a low flight altitude. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 18, SOÁ K3- 2015 Using Unmanned Aerial Vehicles (UAV) for mornitoring the construction progress of Ho Chi Minh City urban railway project Nguyen Huu Nhat1 Dao Minh Tam2 Le Van Trung1 Le Trung Chon1 1 Ho Chi Minh city University of Technology,VNU-HCM 2 Geomatics Center,VNU-HCM (Manuscript Received on April 22nd, 2015, Manuscript Revised June 01st, 2015) ABSTRACT This paper describes a new approach orthoimages, elevation models and 3D for monitoring the construction progress of objects can easily be processed by the Urban Railway Construction Project Pix4Dmapper software. The Ground Control “Metro line1 - Ben Thanh - Suoi Tien” by Points (GCPs) and GIS data were used to using Unmanned Aerial Vehicles (UAV) to compare the achieved accuracy of UAV capture high resolution imagery at different method. This study shows the feasibility of stages of the project. The advantage of the using an UAV system for acquiring the high AscTec Falcon 8 systems lies in their high resolution aerial images and the new flexibility and efficiency in capturing the opportunities for managing construction surface of an area from a low flight altitude. progress over time. In addition, further information such as Key words: UAV, GIS, VN2000, Pix4Dmapper. 1. INTRODUCTION To develop remote imaging techniques that is able to provide high resolution, real-time images for social applications and economic development, as well as for national security applications is important items of Viet Nam’s strategy in space research and applications until 2020 officially approved by the Prime Minister in June 2006, according to the Decision number Trang 105 SCIENCE & TECHNOLOGY DEVELOPMENT, Vol 18, 2015 137/2006/QĐ-TTg. However, Viet Nam has been mainly using satellite images (taken from 500km to 900km altitudes) and images taken from aircraft for altitudes from 300m to . The high-resolution imaging system based on UAVs being capable of .
