1. Results of an Airborne LiDAR survey between Teignmouth and Sidmouth
Ian Davies

2. Advantages of Bathymetric LiDAR
Rapid Coverage
Aircraft surveys at 100 – 150knots
Swath width between 100 – 300m
Seamless land and sea dataset.
Economy of effort in shallow water due to fixed swath width.
Flexibility
Easy Access to Remote Areas
Simultaneous Topographic and Bathymetric Data Collection
Data resolutions from 1-7.5m achievable (Hydro)
Cost
Can be cheaper, and faster, than traditional methods due to potential coverage achieved 8-35km2 per hour

3. Principles of Bathymetric LiDAR
Aircraft Carries a system consisting of:
Two laser sources Green (hydro) and IR (topo)
A Scanner Unit
A Position and Motion Sensor
IR laser reflects from Sea Surface, Green from Seabed
Difference between two is the depth

4. Hawkeye II Scanner moves in an side to side scan pattern
With a spot spacing of between 2-5m
achieving depths of up to 50m in good conditions

5. Hawkeye Data Products Topographic DEM Bathymetric DEM Reflectance Data
Seamless Datasets

6. Scope of Work

7. The Final Surveyed Area

8. The Data

9. The Data

10. The Data from Other Areas
Mid Wales
West Wales

11. The Data from Other Areas

12. Way Ahead Plan to Refly using Chiroptera II Bathymetric LiDAR shortly

13. Thank You