Studying on Burned Scar Mapping Using ENVISAT-MERIS Data
基于ENVISAT-MERIS数据的过火区制图方法研究

After forest fire or grass fire,the burned vegetation usually has a lower reflectance in the NIR-channel than they are healthy.The strong TOA (Top of Atmosphere) reflectance change can be detected in the NIR-channel and Red-channel of Optics Remote Sensing data over a vegetation layer.Extracting burned scar region is one key technique for calculating burned area of forest fire or grass fire by using satellite data.In this study,According to the records of many large forest fires or grass fires which have taken place in the experiment region in recent years,based on the spectral character analysis of typical objects in ENVISAT-MERIS (Medium Resolution maging Spectrometer Instrument) images,methodology of burned scar mapping has been studied.The extracting results have been compared by using image processing method,vegetation index method and object image analysis method.It shows that the results can be used directly to evaluate the burned scar area.It's an effective quantificational method by using object image analysis to extract burned scar region.