What is LiDAR? 15 07/12/2018 16 16 07/12/2018 17 17 - - PowerPoint PPT Presentation

15

07/12/2018

What is LiDAR?

16

07/12/2018 16

17

07/12/2018 17

18

07/12/2018

First return data from the LiDAR (from the canopy)

19

07/12/2018

LiDAR data (25cm) following initial processing (vegetation removal)

Historic England (2018) Using Airborne Lidar in Archaeological Survey. https://historicengland.org.uk/images‐ books/publications/using‐airborne‐lidar‐in‐ archaeological‐survey/

20

07/12/2018

21

07/12/2018

22

07/12/2018 22

23

07/12/2018 23

24

07/12/2018 24

24

Creation of slope and aspect im ages

25

07/12/2018

26

07/12/2018

27

28

07/12/2018

Processing

29

07/12/2018

30

• Quality 3D models, ability to see the forest floor
• Potential tree / species mapping
• Heritage mapping and condition monitoring
• Forest access and management planning
• Viewpoint and recreation planning
• Vegetation height and change detection
• Habitat / corridor mapping
• Drainage and water management
• Good engagement / education tool – 3D printing, virtual tours, maps

07/12/2018

There are m any benefits…….

31

• Need to understand what the vegetation cover is and how it

interacts with the laser

• Lidar WILL NOT work through all types of woodland vegetation
• What resolution survey is appropriate?
• What time of year?
• What survey equipment and specification?
• How should the data be processed?
• Ensure the survey / data are fit for purpose
• What visualisation methods and optimisation are best?
• Beware of false features and artefacts of data processing during

data interpretation

07/12/2018

peter.crow@forestry.gsi.gov.uk

And as m any caveats…….