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Published byRalph Fox Modified over 9 years ago
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Using ALOS/PALSAR and RADARSAT-2 to Map Land Cover and Seasonal Inundation in the Brazilian Pantanal Teresa Evans (tevans@uvic.ca), Maycira Costa (maycira@uvic.ca) 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 2 Open Water Aquatic Vegetation Savanna Forest Multiresolution Segmentation - single date ALOS imagery > -5dB Flooded Forest < -5dB Non-Flooded Forest Grassland/Agriculture < -18dB Flooded Grassland/Agriculture > -18dB Non-Flooded Grassland/Agriculture Jan-07Feb-07May-07Jul-07Aug-08Nov-07 100m 50m100m HH HH/HVHH L-band C-bandL-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 2 The first temporal flood distribution data of the entire Pantanal over one hydrological cycle
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Current research...(new and improved!) Jan-07Feb-07 Feb/Mar- 08Apr-09May-07Jul-07 Aug/Sept -08Aug-08Aug-09Oct-07Nov-07 100m 50m100m 50m 100m HH HH/HVHH L-band C-bandL-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 monitoring 3) 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: tevans@uvic.ca Or visit my website: http://mapping.uvic.ca/spectral/our_people/t_evans Questions?
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