GLC2000: British Isles and Northwest Europe

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GLC2000 British Isles and Northwest Europe

• An Evaluation of the SPOT Vegetation Sensor for
  Land Use Mapping

Erik de Badts
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Flowchart
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Window Definition
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Window Definition

• Comparison with NOAA-AVHRR
• PELCOM

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Cloud Removal

• Spline Function
• Define Cloudy Pixels
• Preservation of Original Pixel Values
• Extrapolations in Beginning and Ending of Time
  Series

• HANTS (Harmonic Analysis of Time Series)
• Lost of Original Pixel Value
• Smoothed Time Series
• No Objective Rules

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HANTS Algorithm Explained
Original cloud affected and reconstructed
cloudfree NDVI time series profile of one pixel
The Fourier components from which the cloudfree
NDVI time series profile is reconstructed
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Conclusion Cloud Removal

• Higher Values in Filled Gaps
• Wider Data Range Extremes

HANTS
Spline
Original
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Regionalization

• Improvement Discrimination Process on Difficult
  Classes
• Misclassification Due to Spectral Confusion
  Reduces

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Classification

• Masks
• Water Bodies
• Urban Areas
• Wetlands
• Classification Treegrowing with CART (Salford
  Systems)
• Forests Red Wavelengths
• NDVI
• CART
• No Undesired Mixed Classes
• Statistical Prove on Separability

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Classification
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Validation

• CORINE
• PELCOM
• FOA-Statistics

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Validation

• Geometrical Distortion of NOAA Shift Towards the
  Southeast
• Push Broom Wisk Broom

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Conclusion

• HANTS Best Way to Obtain a Cloudfree Time
  Series
• Treegrowing is a Consistent Method for
  Classification
• Few Improvement Compared to PELCOM (1.5)

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NDVI Changes in 2000