STUDY THE USE OF MUTLI-TEMPORAL SAR DATA IN RICE AREA MAPPING AND MONITORING FOR ASIA-RICE INITIATIVE

摘要

Asia-Rice Crop Estimation & Monitoring (Asia-RiCE) component of the GEO Global Agricultural Monitoring (GEOGLAM) initiative is started by an ad hoc team of stakeholders in Asia. The aim of the initiate is to develop rice-related information; paddy grown area maps, condition and outlook of the rice growth, monitoring of the growth and finally the rice yield and production, using remote sensing tools and disseminate the same at the local and global scales. This paper discusses the use of multi-temporal SAR data for the identification of rice-planted area, and the potential of growth monitoring carried out through Asia-RiCE group. An algorithm is proposed and emphasis was given to describe the custom-made software tool referred to as International Asian Harvest mOnitoring system for Rice (1NAHOR) in processing the proposed algorithm using multi-temporal data. Tests sites were selected and collaborated was done with national agriculture agencies in Cambodia and Myanmar in applying the algorithm and testing the outcome with ground based data for accuracy verification. In both of the cases, temporal ALOS-2 data were used and acceptable accuracy levels were observed. Moreover, results were shared with decision makers during stakeholders meeting and proposed schemes to integrate space based estimation in national agriculture statistical data collection system.