National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Udham Singh Nagar is one of major rice producing area of Uttarakhand state, and it falls in Tarai region. The soils of the region are considered as most fertile land in India and aptly support rice production. Rice is a mainly grown in the rainy season which results in a limited number of cloud-free optical remote sensing images for estimation of rice acreage and its monitoring. Sentinel-1A is a European radar imaging satellite launched in 2014. Sentinel-1A satellite launched as a part of the European Union's Copernicus program which provide Synthetic aperture radar (SAR) data i.e. potentially well suited for rice crop monitoring. It allows observations of different features of earth which are independent of weather conditions and solar illumination. The basic goal behind this study was to apply new generation Sentinel-1A data with dual polarization (VH and VV) to rice cropping system mapping and monitoring. SAR data provides an advantage in Land use–land cover (LULC) classification task because these images are not influenced by cloud and leads to increase in mapping accuracy. In the present paper the potential of SAR application for measuring rice acreage during persistent cloud cover has been demonstrated using Sentinel-1A data of European Space Agency. Data were pre-processed by applying European Space Agency’s Sentinel Application Platform (SNAP). The SAR dataset classified with a Support Vector Machine (SVM) algorithm provided in ENVI- 5.1 produced the accurate LULC map, which shows that Udham Singh Nagar covers rice area (108,095 Hectares), followed by forest (140,220 Hectares), water body (15,976 Hectares) and fallow land (5060 Hectares) and lastly built up area (2,586 Hectares) with an overall classification accuracy of 92.88% and a Kappa coefficient of 0.89. This mapping approach provides an advantage of all-weather mapping capability of the radar sensor with the short revisit period of Sentinel-1A satellite. The mapping results represent an important step toward future tasks of retrieval of crop biophysical parameters using SAR data.
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