期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2006
卷号：XXXVI-8/W48
页码：51-52
出版社：Copernicus Publications
摘要：In South Africa the National Department of Agriculture (DoA) is the custodian of the Crop Estimates Committee (CEC) that is responsible for the grain crop production estimates, published monthly. The CEC meets monthly to review and debate the current status of cropped area and conditions, to determine crop production estimates for grain crops. Grain crops in South Africa consist of two groups of which crops such as maize, sunflower, Soya beans, and sorghum, are cultivated during summer. The second group of crops are grown during the winter and include wheat, barley, oats and canola. Information about crops was previously only supplied by provincial and industry representatives along with qualitative reports on weather patterns and crop conditions that resulted in subjective calculations
关键词：Satellite Imagery; Crop Area Estimates; Aerial Survey; Point Frame; Crop Type Classification & Spatial Analysis
