Mapping and monitoring rice areas using multi-temporal radar imagery
2011
Raviz, J.V., International Rice Research Inst., Los Baños, Laguna (Philippines) | Quilang, E.J.P., Philippine Rice Research Inst., Maligaya, Science City of Muñoz, 3119 Nueva Ecija (Philippines) | Barbieri, M., Sarmap, Cascine de Barico, CH 6989 Purasca (Switzerland) | Maunahan, A.A. | Alosnos, E.D., Philipine Rice Research Inst., Maligaya, Science City of Muñoz, 3119 Nueva Ecija (Philippines) | Asilo, S.L., International Rice Research Inst., Los Baños, Laguna (Philippines) | .Balleras, G.D. (Baradas, A.C.M.) | Dollentas, R.T. | Ganotisi, N.D., Philipine Rice Research Inst., Maligaya, Science City of Muñoz, 3119 Nueva Ecija (Philippines) | . | Holecz, F., Sarmap, Cascine di Barico, CH 6989 Purasca (Switzerland)
In the Philippines, rice is cultivated on 2.76 million hectares, much of which is cropped twice a year. In spite of this, production is not enough to meet increasing domestic demand. The Philippine Rice Research Institute (PhilRice) and the International Rice Research Institute (IRRI) formed an integrated project in support of the country's rice-self-sufficiency plan. Part of this project is mapping and assessment of rice areas. Information that will be generated from this would be useful in rice importation decisions and in prioritizing research and extension activities such as dissemination of location-specific technologies. Spaceborn remote sensing offers a cost-efficient method to map rice areas particularly through the use of weather independent active microwave sensors such as Synthetic Aperture Radar (SAR) technology. The basic principle behind this approach is regular monitoring of agricultural activities using high resolution images (better than 20 meters) and analysis of the progression of the season using time-series data. By combining existing operational spaceborne SAR sensors, this information can be provided at national scale on a monthly basis, and starting in 2012 with the launch of Sentinel-1, on a weekly basis. RICEscape, developed by sarmap in collaboration with PhilRice and IRRI, is a dedicated processing of chain that enables the mapping of rice areas, detection of emergence, and monitoring of growth for the whole cropping season. Preliminary maps of rice areas for the dry season of 2011 using RICEscape and multi-temporal ENVISAT ASAR Image Mode C-band, ALOS PALSAR Fine Beam L-band, and Cosmo-SkyMed ScanSAR x-band data will be presented. When completed, this study will result in the first radar-based high spatial resolution map of rice producing provinces in the Philippines.
显示更多 [+] 显示较少 [-]