基于遥感监测的地面抽样方法研究——以四川水稻播面变化为例

Study on the method of ground sampling with remote sensing——taking the change of rice area in Sichuan province as example

论述了四川省水稻遥感监测地面样方布设的方法,通过分析四川省特殊的地理位置,结合遥感影像,科学合理地探讨了可运行化的地面抽样方法,即采用分层抽样统计与地面典型抽样统计相结合的方法,利用差分GPS(精度为亚米级)建立四川省水稻监测地面样方,提高监测精度,在95%的置信区间里,可以达到90%的准确率,服务于全省水稻播种面积大尺度遥感监测。

The rice ground sampling collocation method in Sichuan province with remote sensing monitoring was discussed in the paper. Based on analysis of its special geographical location and topography characteristics combined with remote sensing images, we applied for operable ground sampling method, i. e. combining stratified sampling and typical ground sampling in terms of statistical knowledge. The rice ground sampling sites were set up according to differential GPS,in which precision was up to sub-meter level in the 95 % confidence interval, and the monitor precision can reach 90 %, and could satisfy the requirement of rice large-scale remote sensing monitoring in Sichuan province.