1. landsat vs. rapideye tree box s7 e39 (in dash line) 1 3 4 2 5 landsat 17/05/2010 rapideye...
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1. Landsat vs. Rapideye TREE box S7 E39 (in dash line)
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Landsat 17/05/2010 Rapideye 02/07/2010
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2. Change detection
Landsat 17/5/2010
Rapideye 2/7/2010
Landsat 30/6/2000
![Page 8: 1. Landsat vs. Rapideye TREE box S7 E39 (in dash line) 1 3 4 2 5 Landsat 17/05/2010 Rapideye 02/07/2010](https://reader035.vdocument.in/reader035/viewer/2022062412/5a4d1aff7f8b9ab059985fa6/html5/thumbnails/8.jpg)
Landsat 30/6/2000 Landsat 1/7/2010 Rapideye 2/7/2010
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3. Forest cover detectionLandsat 1/7/2010
Rapideye 2/7/2010
VHR image 05/10/2009
Object-based segmentation
![Page 10: 1. Landsat vs. Rapideye TREE box S7 E39 (in dash line) 1 3 4 2 5 Landsat 17/05/2010 Rapideye 02/07/2010](https://reader035.vdocument.in/reader035/viewer/2022062412/5a4d1aff7f8b9ab059985fa6/html5/thumbnails/10.jpg)
Rapideye vs. Landsat
Landsat 2010
Rapideye 2010
Analysis of no-change polygons
![Page 11: 1. Landsat vs. Rapideye TREE box S7 E39 (in dash line) 1 3 4 2 5 Landsat 17/05/2010 Rapideye 02/07/2010](https://reader035.vdocument.in/reader035/viewer/2022062412/5a4d1aff7f8b9ab059985fa6/html5/thumbnails/11.jpg)
Landsat overestimation of logged area
VHR
LS
RE
![Page 12: 1. Landsat vs. Rapideye TREE box S7 E39 (in dash line) 1 3 4 2 5 Landsat 17/05/2010 Rapideye 02/07/2010](https://reader035.vdocument.in/reader035/viewer/2022062412/5a4d1aff7f8b9ab059985fa6/html5/thumbnails/12.jpg)
VHR
LS
RE
Non detection of small forest blocks
![Page 13: 1. Landsat vs. Rapideye TREE box S7 E39 (in dash line) 1 3 4 2 5 Landsat 17/05/2010 Rapideye 02/07/2010](https://reader035.vdocument.in/reader035/viewer/2022062412/5a4d1aff7f8b9ab059985fa6/html5/thumbnails/13.jpg)
82% forest cover
81% forest cover
47% forest cover
VHR
LS
RE
Underestimation of forest cover
![Page 14: 1. Landsat vs. Rapideye TREE box S7 E39 (in dash line) 1 3 4 2 5 Landsat 17/05/2010 Rapideye 02/07/2010](https://reader035.vdocument.in/reader035/viewer/2022062412/5a4d1aff7f8b9ab059985fa6/html5/thumbnails/14.jpg)
y = 0.6111x - 0.1532R² = 0.3624
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fore
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Land
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forest proportion - high resolution
Landsat Polygons greater than 0.5 ha
Rapideye vs. Landsat
• In fragmented landscapes, Landsat fails to detect forest in many areas with forest cover of 20-90% (errors of omission)
• In homogeneous landscapes, Landsat fails to detect small canopy openings (errors of forest commission)
• Landsat forest estimates have high variance in those areas with forest cover higher than 90% (inaccuracy and lack of precision).
y = 0.8023x - 0.0648R² = 0.6169
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forest proportion - high resolution
'Sentinel' Polygons greater than 0.5 ha
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forest proportion
Area and detection - Landsat
Rapideye vs. Landsat
• Landsat fails to detect forest in many areas smaller than 1 ha.
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Area and detection 'Sentinel'
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Area and detection - High resolution
Actual distribution of forest cover within polygons from VHR data (just for comparison with the previous slide).
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Landsat overestimation of logged area
VHR
LS
SE_S
![Page 18: 1. Landsat vs. Rapideye TREE box S7 E39 (in dash line) 1 3 4 2 5 Landsat 17/05/2010 Rapideye 02/07/2010](https://reader035.vdocument.in/reader035/viewer/2022062412/5a4d1aff7f8b9ab059985fa6/html5/thumbnails/18.jpg)
VHR
LS
SE_S
Non detection of small forest blocks
![Page 19: 1. Landsat vs. Rapideye TREE box S7 E39 (in dash line) 1 3 4 2 5 Landsat 17/05/2010 Rapideye 02/07/2010](https://reader035.vdocument.in/reader035/viewer/2022062412/5a4d1aff7f8b9ab059985fa6/html5/thumbnails/19.jpg)
82 % forest cover
76 % forest cover
47 % forest cover
VHR
LS
SE_S
Underestimation of forest cover
![Page 20: 1. Landsat vs. Rapideye TREE box S7 E39 (in dash line) 1 3 4 2 5 Landsat 17/05/2010 Rapideye 02/07/2010](https://reader035.vdocument.in/reader035/viewer/2022062412/5a4d1aff7f8b9ab059985fa6/html5/thumbnails/20.jpg)