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Mapping forest loss &
degradation using
satellite imagery
Paul Gager
Technical Director
1
Drivers of Deforestation and
Degradation
Logging
(Mechanized)

Agro-Forestry
Plantations

Infrastructure and
Land Developm...
Why monitor ?
•
•
•
•

Land use management
Protected area management
Forest resource management
Forest Carbon assessment

...
Platforms – UAV
• User can own the system
– Coverage of large areas difficult
– Operational expenses; vehicles, staff, spa...
5
Platforms – VHR Satellite Imagery
• Very High Resolution Satellite Imagery
– Very effective, but high cost
– Some expertis...
Platforms- Mid resolution satellite
• Good trade off between cost and coverage
• Can detect changes in canopy,
constructio...
RapidEye – 5m pixels

8
One year later

9
Mid res compared to Aerial Photo

10
Platforms – Low and Mid-res
• Often free or very low cost
• Mainly useful for land conversion mapping
or mapping very larg...
Mapping Techniques

12
Manual Approaches: Inconsistent
Mapping Between Years

13
Another example..

14
Segmentation and Classification

Original Image

Image Objects
15

Classified Image
Ground Truth Data

16
Ground Truth Data

17
Mapping Change

Year 1

Year 2

18

Change Image
Classification of Change

19
Natural Deforestation

20
Questions ?

21
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Mapping Forest Loss and Degradation Using Satellite Imagery

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Mapping Forest Loss and Degradation Using Satellite Imagery

  1. 1. Mapping forest loss & degradation using satellite imagery Paul Gager Technical Director 1
  2. 2. Drivers of Deforestation and Degradation Logging (Mechanized) Agro-Forestry Plantations Infrastructure and Land Development Logging (Artisanal/RIL – reduced impact logging) Swidden Agriculture Wildfires 2
  3. 3. Why monitor ? • • • • Land use management Protected area management Forest resource management Forest Carbon assessment 3
  4. 4. Platforms – UAV • User can own the system – Coverage of large areas difficult – Operational expenses; vehicles, staff, spare parts – Need to train and manage skilled staff 4
  5. 5. 5
  6. 6. Platforms – VHR Satellite Imagery • Very High Resolution Satellite Imagery – Very effective, but high cost – Some expertise required to process 6
  7. 7. Platforms- Mid resolution satellite • Good trade off between cost and coverage • Can detect changes in canopy, construction of roads, skid trails • May not identify individual tree loss 7
  8. 8. RapidEye – 5m pixels 8
  9. 9. One year later 9
  10. 10. Mid res compared to Aerial Photo 10
  11. 11. Platforms – Low and Mid-res • Often free or very low cost • Mainly useful for land conversion mapping or mapping very large areas 11
  12. 12. Mapping Techniques 12
  13. 13. Manual Approaches: Inconsistent Mapping Between Years 13
  14. 14. Another example.. 14
  15. 15. Segmentation and Classification Original Image Image Objects 15 Classified Image
  16. 16. Ground Truth Data 16
  17. 17. Ground Truth Data 17
  18. 18. Mapping Change Year 1 Year 2 18 Change Image
  19. 19. Classification of Change 19
  20. 20. Natural Deforestation 20
  21. 21. Questions ? 21

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