一、什么是遥感?“遥感”,顾名思义,就是遥远地感知。传说中的“千里眼”、“顺风耳”就具有这样的能力。人类通过大量的实践,发现地球上每—个物体都在不停地吸收、发射和反射信息和能量,其中有一种人类已经认识到的形式——电磁波,并且发现不同物体的电磁波特性是不同的。遥感就是根据这个原理来探测地表物体对电磁波的反射和其发射的电磁波,从而提取这些物体的信息,完成远距离 First, what is remote sensing? “Remote sensing”, as the name implies, is far-reaching perception. Legendary “clair eyes” and “wind ears” have such ability. Through a great deal of practice, humans have discovered that every object on earth constantly absorbs, transmits, and reflects information and energy. There is a form that humans have already recognized - electromagnetic waves, and the electromagnetic wave characteristics of different objects are found to be different. . Remote sensing is based on this principle to detect the reflection of electromagnetic waves from surface objects and the electromagnetic waves emitted by them, so as to extract the information of these objects and complete the long distance.