An evaluation of different bi-spectral spaces for discriminating burned shrub-savannah |
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Authors: | S Trigg S Flasse |
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Affiliation: | 1. Joint Research Centre , Monitoring Agriculture with Remote Sensing—Institute for the Protection and Security of the Citizen , TP 266, 21020 Ispra, VA, Italy E-mail: felix.rembold@jrc.it;2. Istituto di Biometeorologia—Consiglio Nazionale delle Ricerche , P. le delle Cascine 18, 50144 Firenze, Italy |
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Abstract: | We report on the numerical separation of burned and unburned vegetation classes using different bi-spectral spaces, based on the analysis of spectroradiometric data collected in situ and convolved to five spectral bands at red to mid-infrared (MIR) wavelengths. A combination of two MIR bands was found to have strong spectral separation of burned and unburned samples. Using these bands, a spectral index was formulated which is highly sensitive to spectral changes due to burning and relatively insensitive to intrinsic variability. Results have implications for the remote sensing of burned shrub-savannah using bands available on high- and low-spatial resolution sensors, in particular, Landsat TM and MODIS. |
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