MINISTRY OF NATURAL RESOURCES & ENVIRONMENT REMOTE SENSING CENTRE Application of LiDAR technology in Vietnam Dr Hoang Ngoc Lam MSc Nguyen Thuc Anh Hanoi, 22 May 2007 Content ● Technical details of LiDAR projects ● Project workflow & examples from current project ● Applications of LiDAR data ●Q & A Projects technical details Vinhlong - Bentre: 2.200 km2 Cantho: 1.800 km2 May 2007 July 2006 Contractor: GeoKosmos Contractor: AAMHatch ● ● ● ● ● ● ● ● ● ● LiDAR system: ALTM 3100 C Airplane: ANTONOV Flying speed: 180 km/h Flying altitude: 1500m Strip side-overlap: 25% GPS frequency: Hz INS frequency: 200 Hz Scan frequency: 70 Hz Laser repetition rate: 70kHz Output: ● ● Laser points: Clasified Intensity image ● Quality control: ● ● 390 checking points by GPS RTK along roads RMSE: 0.14m ● ● ● ● ● ● ● ● ● ● ● LiDAR system: ALTM 3100 C Airplane: Flying altitude: 1500m Strip side-overlap: 30% GPS frequency: Hz INS frequency: 200 Hz Scan frequency: 70 Hz Laser repetition rate: 70kHz Scale angle: 25 Point density: ~ 1m Digital camera: Rollei AIC modular LS 22Mp ● ● ● Focal length: 50 mm ● Output: Scale 1:30.000 Ground resolution: 27 cm ● ● ● ANTONOV Flying speed: 180 km/h Laser points: Classified Intensity image Simultaneously taken color air-photo Project workflow Vinhlong – Bentre LiDAR project May 2007 Laser acquisition: Project design & GPS basestation Laser acquisition Post-processing: REALM: Strip trajectory Post-processing: PosPac: Estimated error & RMSE Filtering: TerraScan 10 Quality control 1053 ground control points by GPS RTK Preliminary results: RMSE = 0.12 m 11 Outputs: Laser points 12 Outputs: Laser points with airphoto 13 Outputs: Laser points with airphoto 14 Applications ● High resolution DEM generation: Integrated GIS for Mekong delta regional development 15 Applications ● 3D city model and urban management applications ● DSM generation & Wireless communication management 16 Applications: 3D model with airphoto 17 Applications: 3D model with airphoto 18 Applications: 3D model with airphoto 19 Other applications ● ● ● ● ● ● ● ● ● ● ● ● 20 Civil engineering & Infrastructure development Corridor mapping Spatial planning Forestry applications Flood monitoring Landslide monitoring Erosion monitoring Coastline monitoring Irrigation management Coastline analysis and protection Volumetric studies Geomorphology & archeology Thank you for your attention! 21 [...]... Applications: 3D model with airphoto 17 Applications: 3D model with airphoto 18 Applications: 3D model with airphoto 19 Other applications ● ● ● ● ● ● ● ● ● ● ● ● 20 Civil engineering & Infrastructure development Corridor mapping Spatial planning Forestry applications Flood monitoring Landslide monitoring Erosion monitoring Coastline monitoring Irrigation management Coastline analysis and protection Volumetric... ground control points by GPS RTK Preliminary results: RMSE = 0.12 m 11 Outputs: Laser points 12 Outputs: Laser points with airphoto 13 Outputs: Laser points with airphoto 14 Applications ● High resolution DEM generation: Integrated GIS for Mekong delta regional development 15 Applications ● 3D city model and urban management applications ● DSM generation & Wireless communication management 16 Applications: