Study Area – The Brazilian Pantanal
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Transcript of Study Area – The Brazilian Pantanal
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Using ALOS/PALSAR and RADARSAT-2 to Map Land Cover and Seasonal Inundation in the Brazilian Pantanal
Teresa Evans ([email protected]), Maycira Costa ([email protected])University of Victoria, Department of Geography, SPECTRAL Laboratory
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Study Area – The Brazilian Pantanal
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Importance, threats…
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Radar Backscatter Variability
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HIERARCHICAL CLASSIFICATION STRATEGY
Multiresolution Segmentation
using ALOS Feb and July, RSAT
HH/HV
Multiple hierarchical
classification rules determined based on objects values
and backscattering variability
Level 1
Level 2Open Water
Aquatic Vegetation
Savanna
Forest
Multiresolution Segmentation -
single date ALOS imagery
> -5dB Flooded Forest
< -5dBNon-Flooded Forest
Grassland/Agriculture
< -18dB Flooded Grassland/Agriculture
> -18dB
Non-Flooded Grassland/Agriculture
Jan-07 Feb-07 May-07 Jul-07 Aug-08 Nov-07100m 100m 100m 100m 50m 100m
HH HH HH HH HH/HV HHL-band L-band L-band L-band C-band L-band
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Level 1
Overall Accuracy ~ 81%
Highest degree of confusion between Savanna class and both Forest, and Grasslands/Agriculture due the high degree of cross-over between classes
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Level 2The first temporal flood distribution data of the entire Pantanal over one hydrological cycle
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Current research...(new and improved!)
Jan-07 Feb-07Feb/Mar-
08 Apr-09 May-07 Jul-07Aug/Sept-
08 Aug-08 Aug-09 Oct-07 Nov-07100m 100m 50m 100m 100m 100m 50m 50m 100m 100m 100m
HH HH HH HH HH HH HH HH/HV HH HH HHL-band L-band L-band L-band L-band L-band L-band C-band L-band L-band L-band
Fine spatial resolution 12.5m L and C-band dual-season for Nhecolândia sub-region;
Additional dates and addition of dual-season 50m for coarse resolution Pantanal flood analysis for 100m
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Will be used for:1) ongoing local habitat studies in the region (marsh deer, jaguar)2) Baseline data for monitoring3) Important information to aid in defining conservation areas
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Acknowledgements
SAR Imagery Ancillary Data
FUNDING!
FOR MORE INFORMATION…Contact me (Teresa Evans)
email: [email protected]
Or visit my website:http://mapping.uvic.ca/spectral/our_people/t_evans
Questions?