Information source is the target of remote sensing. Any target has the characteristics of reflecting, absorbing, emitting and radiating electromagnetic waves. When the target interacts with electromagnetic waves, the electromagnetic wave characteristics of the target will be formed, which provides the basis for obtaining information for remote sensing detection.
Information acquisition refers to the detection process of receiving and recording the electromagnetic wave characteristics of the target by remote sensing technology. Remote sensing technology and equipment for information acquisition mainly include remote sensing platforms and sensors. Among them, the remote sensing platform is a vehicle used to carry sensors, such as balloons, airplanes, satellites and so on. Sensors are instruments and equipment used to detect electromagnetic wave characteristics of targets, such as cameras, scanners and imaging radars.
Information processing refers to the technical process of correcting, analyzing and interpreting the obtained remote sensing information by using optical instruments and computer equipment. The function of information processing is to master or clear the errors of the original remote sensing information through the correction, analysis and interpretation of the remote sensing information, sort out and summarize the image characteristics of the detection target, and then identify and extract the necessary useful information from the remote sensing information according to the characteristics.
Information application refers to the process that professionals apply remote sensing information to various business fields for different purposes. The basic method of information application is to use remote sensing information as the data source of geographic information system for people to query, count, analyze and use. Remote sensing has a wide range of applications, including military, geological and mineral exploration, natural resources investigation, map mapping, environmental monitoring and urban construction and management.