一、前言利用遥感技术通过卫星进行地面调查的优点是:①从点的观测扩大到面的观测,通过卫星观测系统可以更有效地进行大范围地面调查;②用较少的图像,结合统计抽样调查可以进行国家或全球规模的调查;③在农业上,遥感法不仅可以进行一次性评价,还可以动态监测农作物的生长状况。 I. INTRODUCTION The advantages of using ground-based surveys of remote sensing technology to perform satellite surveys are as follows: ① The observation from a point to the observation of a plane can be conducted more efficiently through a satellite observing system; ② With fewer images, combined with statistical sampling The survey can be conducted on a national or global scale; ③ In agriculture, remote sensing can not only make a one-time evaluation, but also dynamically monitor the growth of crops.