Study On Crop Spectral Information Management System Based On XML Metadata

With the rapid development of agricultural informatization, "precision agriculture" has been widely applied to agricultural production, and as one of the core technologies of "precision agriculture"- low altitude remote sensing technology is very useful in the scientific research work. Different from the traditional crop information acquisition, hyperspectral technology is very popular in the field of crop information collection with its high resolution, high sensitivity, large amount of information, convenient measurement and so on. The systematic hyperspectral data also provide data support for the realization of remote sensing technology. However, the high spectral data structure is complex, rigorous and large, the field collected spectral data can not be used without the environmental information, physical information, chemical information and other ancillary information independently. For low altitude remote sensing research of crops, it is urgent to design a data management system which is based on the information of the spectral and combined with the auxiliary information.XML is an extensible markup language, which is used to describe metadata. Metadata is data about data, which is a standard kind of data application, and also a kind of coding system. Metadata can describe the structure and relationship of information in a distributed environment of data sharing. The fields of network resources, literature, social science and geospatial information have formed some international metadata standards to guide the content and structure of the data. But in terms of little spectral information metadata research, it is an opportunity to design a universal spectral information metadata standard model by study on the development of the spectral database and metadata model system. The metadata model is used as the basis to construct the spectral information management system, and the related key technologies are studied and discussed in this paper.The research work of this paper mainly completed the following aspects:(1) Designing the spectral information metadata model according to the spectral data, environmental data and other ancillary data for structuring and regularizing the spectral measurement information.(2) Using wxWidgets and wx Python to design the client interface for the spectral information management system, to visualize the spectral information.(3) Using the MVC framework to design the core of the spectral information management system, and the metadata model is integrated into the system to realize the information management based on XML data files.