Title :
Monitoring changes in tropical forests using L-band synthetic aperture radar data
Author :
Motohka, Takeshi ; Shimada, Masanobu ; Watanabe, Manabu ; Kawano, Namiko ; Shiraishi, Tomohiro ; Thapa, Rajesh Bahadur
Author_Institution :
Japan Aerosp. Exploration Agency (JAXA), Tsukuba, Japan
Abstract :
In the paper, we present the performance analyses of the L-band SAR data (PALSAR and Pi-SAR-L2) for tropical deforestation and degradation monitoring in Riau province, Indonesia. For deforestation monitoring, accuracy assessment and demonstration of wide area mapping using the time series PALSAR gamma naught mosaics were shown. We used a simple thresholding for the temporal gamma naught changes in HV polarization, which allowed us to map annual deforestation full-automatically with over 90% accuracy and 100 m resolution. For degradation, we found that texture information in backscatter intensity images has a potential for wall-to-wall mapping the changes of canopy structure due to fallen trees.
Keywords :
data analysis; forestry; remote sensing by radar; synthetic aperture radar; time series; vegetation mapping; HV polarization; Indonesia; L-band SAR data performance analyses; L-band synthetic aperture radar data; PALSAR; Pi-SAR-L2; Riau province; annual deforestation map; backscatter intensity images; canopy structure changes; deforestation accuracy assessment; demonstration wide area mapping; fallen trees; simple thresholding; temporal gamma naught changes; texture information; time series PALSAR gamma naught mosaics; tropical deforestation monitoring; tropical degradation monitoring; tropical forest monitoring changes; wall-to-wall mapping; Accuracy; Degradation; Image resolution; L-band; Monitoring; Synthetic aperture radar; Time series analysis;
Conference_Titel :
Synthetic Aperture Radar (APSAR), 2013 Asia-Pacific Conference on
Conference_Location :
Tsukuba