Study On Application Of Metadata Theory In Forestry Information Management

Metadata is of great significance for the promotion of forestry management, sharing and using, metadata theory used in mining forestry information has far-reaching significance for forestry research and development. Through the theory of meta-data to describe the forestry information, providing information which relate to forestry production data storage, data classification, data content, data quality, data formats, data exchange network and data sales, and providing a summary description of the original data set, it promotes the forestry information sharing, provides a possible for better use and transformation of our forest resources. Through Metadata theory, it can establish forestry information documents and index information which help the effective management of forestry production and maintenance of forestry information and enhance efficiency.based on national science and technology support plans "studies of forest resources monitor technical" issue (task book ID:2006BAD23B0204-3), this paper takes Guangzhou forestry information as an main example, exploring the theory of meta-data used in Guangzhou forestry information research.This paper is based on the theory of meta-data and based on the analysis for problems which exist in forestry information management operations and the current needs of data users, puts forward views for forestry information managing metadata standards through the metadata-based and the use of forestry information, initially realizes the management and use of the database and the meta-database, also makes some useful explorations for forestry information data mining which is based on the database management and makes the foundation for the future data mining work.The main conclusions of this paper are as follows:(1) Based on existing scientific meta-data standards and metadata standards of forestry, in accordance with the three-tier model of "meta-data-sharing standards, the area of metadata standards, the field of special meta-data standard" to determine the UML model of the data set meta-data, which includes the following modules: identification information module, the information distribution module and the information maintain module.(2)This paper takes a data set to collate historical data, in accordance with the development of metadata standards to describe data sets and build a metadata database, and makes a try for the metadata theory applications of forestry information of Guangzhou and improves the standardization of forestry information management in Guangzhou.(3) This paper realizes the access of a data set and the classification retrieval and browsing of metadata, providing users with a more detailed description on data sets, such as detailed records of the methods and conditions of data generated.(4) On the basis of initially query and sharing, this article makes a mining for the further use of forestry information data to improve the efficiency of the use of forestry information.The use of meta-data theory in forestry information research certainly is a process of step by step, and gradually deepen. The use of meta-data theory in our forestry information research is still at an initial stage, compared with developed countries, the concept is still existing some gap,. The following questions remain to be further study:(1)making out a spatial metadata standards of forestry information. (2) the ownership of the forestry information. (3)further exploration for forestry information data mining and distributed computing algorithm for massive forestry information data mining.