Extent of Crop Cultivation in South Africa

Data on cropland was obtained from the global data set produced by the UN Food and Agriculture Organisation (FAO). Data set was obtained as a raster image, and clipped to the boundaries of South Africa, before being converted to a vector layer. The FGGD land cover occurrence maps are global raster data layers with a resolution of 5 arc-minutes. Each pixel in each map contains a value representing the percentage of the area belonging to the land cover type concerned. The method is described in FAO and IIASA, 2007, Mapping biophysical factors that influence agricultural production and rural vulnerability, by H. von Velthuizen et al耕地相关数据取自联合国粮食及农业组织（Food and Agriculture Organization of the United Nations，FAO）制作的全球数据集。该数据集以栅格影像格式获取，先裁切至南非国界范围，随后转换为矢量图层。FGGD土地覆盖发生图为分辨率5弧分的全球栅格数据图层，每张图中的每个像素均包含一个数值，代表对应土地覆盖类型的面积占比。该方法的详细说明可参考H. von Velthuizen等学者于2007年由FAO与国际应用系统分析研究所（International Institute for Applied Systems Analysis）联合完成的《Mapping biophysical factors that influence agricultural production and rural vulnerability》一文。