线采样系统提出以线状样区代替以往成数抽样中的点样区与面积样区概念，通过统计线状样区内作物种植面积成数来反映区域总体农作物种植面积成数。
The GVG system is a new solution, with the conception of sampling lineage instead of the traditional sampling point or sampling area, to extracting crop acreage information.
水稻是信阳市最主要的农作物之一，水稻种植面积占全市农作物种植总面积的84%。
Rice is one of the important crop in Xinyang City, rice plant area is 84% in the whole crop area.
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