What is satellite remote sensing data?

Satellite remote sensing data is an important part of the Geographic Information System database. Using it as the basic data source, Data Interpretation marks are created based on its attribute information to extract basic geographic information data. If we further analyze and study other information related to satellite remote sensing data and convert it into arithmetic operations and logical operations, we can establish a comprehensive remote sensing information interpretation model, this function enables computers to automatically process and interpret and extract basic geographic information data from remote sensing data, greatly improving the technology of extracting and interpreting remote sensing data and increasing the objectivity of data collection, this avoids the subjectivity of manual interpretation during human-computer interactive collection and inconsistency between different persons, shortens the Data Collection Cycle, reduces workload, and improves work efficiency.
Humans obtain and accumulate a large amount of remote sensing data through remote sensing satellite sensors, but the data cannot be effectively processed and fully utilized before GPS. The establishment of remote sensing information interpretation model can change this situation. In addition, as part of the geographic information model, the remote sensing information model is also conducive to the application and development of geographic information system technology.

Conditions for establishing remote sensing information interpretation marks and Models

Currently, satellite remote sensing sensors have the same band range and the color band range is basically the same. At present, satellite remote sensing data is mainly obtained by receiving Ground Reflection electromagnetic waves, it is helpful to establish suitable Remote Sensing Image Interpretation marks and models. After decades of application, a large amount of satellite remote sensing data and experience have been accumulated, and the data quality is stable and reliable, which is conducive to the establishment of public Remote Sensing Data Interpretation marks and models. Satellite remote sensing technology has developed rapidly. For example, the resolution of French SPOT5 satellite images can reach 2.5 meters, and stereoscopic images can be obtained for stereo observation, it provides reliable support for high-precision basic geographic information data collection, as well as favorable conditions for the establishment of remote sensing image interpretation marks and the Development and Research of Remote Sensing image information models. Satellite remote sensing sensors and remote sensing data processing technologies have developed rapidly. Some sensors perform three-dimensional observation, improve the resolution of various types of remote sensing data, and perform remote sensing.
The Development of Data enhancement processing technology provides favorable conditions for the development and research of remote sensing image interpretation marks and remote sensing image information models. The rapid development of computer hardware technology provides reliable support for rapid interpretation and processing of remote sensing image data. The development of remote sensing data processing and interpretation software provides better technical support for the research of remote sensing information models.

Establishment of Image Interpretation marks

Remote Sensing Image Interpretation marks are also called interpretation elements, which can directly reflect the image features of the identified object information. The Interpreter uses these marks to identify the nature, type, or condition of the object or phenomenon on the image, therefore, it is of great significance for man-machine interactive interpretation of remote sensing image data. The establishment of remote sensing image interpretation marks can improve the accuracy, accuracy and objectivity of the remote sensing image data used for basic geographic information data collection in China.
Because our country has a vast territory and there is a great difference between landform and climate, GIS can divide the country into different types of landform-like areas based on landform and climate conditions, the establishment of interpretation marks for each basic geographic information element in the simple landform sample area is helpful to determine the collection range using the correct method. Special interpretation marks can be set up for some special geographic information elements. When creating a remote sensing information model, you can add these attributes to the logical operation. For the season in which images are used to establish interpretation marks, summer with a high vegetation coverage should be avoided, and data with a large amount of snow, cloud cover, or smoke impact should be avoided. The combination sequence of the remote sensing image band and the full color band should be selected based on the requirements for extracting basic geographic information data. Avoid information loss when performing enhanced data processing.
The requirement for selecting a typical logo building area on an image is that the range is moderate to reflect the typical characteristics of this type of landform, including as many basic geographic information elements in this type of landform as possible, and the image quality is good. After the selection of the logo area, find all the basic geographic information elements included in the logo area, select various typical map spots for collection, and then perform field verification, modify unreasonable parts until they are in line with the field. At the same time, this photo is taken on the ground to facilitate the association between the image and the actual ground elements, express the authenticity and intuition of the remote sensing image interpretation marks, and deepen users' understanding of the interpretation marks.
The establishment of remote sensing image interpretation marks is conducive to the interpreter's correct judgment and collection of remote sensing information, which is necessary to collect basic geographic information data from remote sensing images through human-computer interaction, especially when the scope of the operation area is large, the Knowledge Background of the operator is very different, and the field survey is insufficient, this allows operators to quickly adapt to the natural geographical environment and interpretation collection requirements of the interpretation area. However, human-computer interactive interpretation cannot quickly process a large amount of satellite remote sensing data. Therefore, a complete remote sensing information interpretation model needs to be established to facilitate the interpretation and collection of remote sensing information by computers. The interpretation mark of remote sensing images is the premise and basis for the establishment of remote sensing information models. A more accurate interpretation mark of remote sensing information can be used to establish a more practical remote sensing information model.

Establishment of remote sensing information model

The remote sensing information model consists of the terrain model, physical model, and mathematical model. It is a model established by using the methods of remote sensing information and geographic information regionalization, it is a type of visual model that combines the image model and the abstract model.
Geographic phenomena and geographic processes are very complex, with both inevitable rules and accidental influences. Therefore, the establishment of remote sensing information interpretation models should consider various related information, the quantitative analysis and weighted analysis methods are used to construct a remote sensing information interpretation model and perform logical analysis and calculation. Because there are many factors that affect the interpretation and interpretation of remote sensing images, they are also very complicated. Therefore, we need to analyze the main cause and discard some secondary factors without affecting the correct judgment, simplify the remote sensing information model and reduce the difficulty of modeling.
The application of remote sensing information model in remote sensing image interpretation can greatly improve the data collection speed and reduce the workload of manual interpretation and collection. The remote sensing information model is the basis for automatic interpretation and extraction of remote sensing information, and also the basis for Geographic Information System geological analysis. Remote Sensing Image Interpretation marks and remote sensing information models are important aspects of remote sensing information research and the development direction of remote sensing information application.

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