1 Application of LiDAR technology in Vietnam Dr. Hoang Ngoc Lam MSc. Nguyen Thuc Anh Hanoi, 22 May 2007 MINISTRY OF NATURAL RESOURCES & ENVIRONMENT REMOTE.

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Presentation transcript:

1 Application of LiDAR technology in Vietnam Dr. Hoang Ngoc Lam MSc. Nguyen Thuc Anh Hanoi, 22 May 2007 MINISTRY OF NATURAL RESOURCES & ENVIRONMENT REMOTE SENSING CENTRE

2 Content Technical details of LiDAR projects Project workflow & examples from current project Applications of LiDAR data Q & A

3 Projects technical details Cantho: km 2 July 2006 Contractor: AAMHatch LiDAR system: ALTM 3100 C Airplane:ANTONOV 2 Flying speed:180 km/h Flying altitude:1500m Strip side-overlap:25% GPS frequency:1 Hz INS frequency:200 Hz Scan frequency:70 Hz Laser repetition rate:70kHz l Output: Laser points: Clasified Intensity image l Quality control: 390 checking points by GPS RTK along roads RMSE: 0.14m Vinhlong - Bentre: km 2 May 2007 Contractor: GeoKosmos LiDAR system: ALTM 3100 C Airplane:ANTONOV 2 Flying speed:180 km/h Flying altitude:1500m Strip side-overlap:30% GPS frequency:1 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 Scale 1: Ground resolution: 27 cm l Output: Laser points: Classified Intensity image Simultaneously taken color air-photo

4 Project workflow

5 Vinhlong – Bentre LiDAR project May 2007

6 Laser acquisition: Project design & GPS basestation

7 Laser acquisition

8 Post-processing: REALM: Strip trajectory

9 Post-processing: PosPac: Estimated error & RMSE

10 Filtering: TerraScan

11 Quality control 1053 ground control points by GPS RTK Preliminary results: RMSE = 0.12 m

12 Outputs: Laser points

13 Outputs: Laser points with airphoto

14 Outputs: Laser points with airphoto

15 Applications High resolution DEM generation: Integrated GIS for Mekong delta regional development

16 Applications 3D city model and urban management applications DSM generation & Wireless communication management

17 Applications: 3D model with airphoto

18 Applications: 3D model with airphoto

19 Applications: 3D model with airphoto

20 Other applications 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

21 Thank you for your attention!