Nana Yan

TL;DR: This paper provides an overview of the eight main global and regional scale agricultural monitoring systems currently in operation and compares them based on the input data and models used, the outputs produced and other characteristics such as the role of the analyst, their interaction with other systems and the geographical scale at which they operate.

TL;DR: The integrated water body mapping method is suitable for the applications of HJ-1A/B multi-spectral satellite images in this field and the test study results indicated that the NDVI–NDWI index is superior to the single index of NDVI and NDWI to enhance the contrast between water bodies and the rest of the features.

TL;DR: In this paper, the authors presented new algorithms for the aerodynamic roughness length for complex landscape, for gap filling for cloud days, and for data fusion at different resolutions, based on the Penman-Monteith equation.

TL;DR: A comprehensive overview of CropWatch as a remote sensing-based system, describing its structure, components, and monitoring approaches is presented and a comparison with other global crop-monitoring systems is discussed.

TL;DR: The hierarchical approach adopted by CropWatch is the basis of the analyses of climatic and crop conditions assessments published in the quarterly “CropWatch bulletin” which provides accurate and timely information essential to food producers, traders and consumers.