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
Study Area – The Brazilian Pantanal
Importance, threats…
Radar Backscatter Variability
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
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
Level 2The first temporal flood distribution data of the entire Pantanal over one hydrological cycle
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
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
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?
