The Study Of Structure And Component Interface Techniques Of 4G Information System

Since the 20th century, the development of computer technology is rapid, the computer graphics theory is ever-perfecting, the geo-information technology is advancing. As a multi-disciplinary technology, geographic information system (GIS) technology has achieved a wealth of technical achievement and innovation in geographic spatial pattern analysis, geological spatial data integration and spatial decision-making. However, the geological space are mostly under the crust, which is causing the "black box" feature of geographic problems, making the application of GIS laggard than the study of space remote sensing and geography. Many models of geographical space is not applicable to the geological space, and has theoretical shortcomings and actual deviation in a certain degree. The core problem is that it can not exactly express the combination, spatial structure and regional contrast of the geology variable. However, the adaptability between the three metrics are necessary conditions of geological integrated analysis and mineral resources evaluation. Therefore, geospatial field needs a targeted platform to analyse, process and integrate massive geographic data, make geological modeling, spatial data analysis, geological integrated decision-making. These problems can be grouped into three categories according to content:the digital feature expression of geological, the transition of digital geological model and the development of geographical information platform.This paper try to improve kernel technology of 4G information system to upgrade it. This paper make the study of structure and component interface technology of 4G information system, formulate the technology upgrade route, make effective secondary development according to the open design concept. The research contents are as follows: investigate the design principles of system structure, the design of 4G geological database and the function of every module to provide a digital information platform for the automatic search and evaluation of mineral resources, enhance the services of 4G information system, provide operational solutions for the whole process of mineral resources prediction, provide automatical, intelligent and visual services. The work and achievements of this paper are summarized as follows:Firstly, the function research of GIS: Based on a large number of literature materials, this paper investigates the definition, composition, functions, types, applications and secondary development model of GIS, and systematically summarizes the major functions which is provided by GIS for mineral resources evaluation.Secondly, the study of functions of general GIS software: GIS software is the core of GIS. It is related to the performance merits and the functional strength of GIS. This paper investigates three commonly software platform: MapGIS, MapInfo, and ArcGIS, analyze their structures, characteristics and functions to provide theoretical basis for the platform selection and the data structures study of 4G information system.Thirdly, the study of the theoretical core and key technologies of 4G information system: Because of the complexity, periodic and diversity of geological effects and mineralization, the theoretical and technical systems are very large of the acquisition, processing and analysis of geological spatial information. Therefore, it is necessary to establish a technology platform between original geological data and results. According to this need, 4G information system was proposed. It is a computer system whose analysis core is the integration analysis of geological data information, including geology date, geography date, geochemistry date and geophysics date, and provide services to the mineral resource prediction. Based on data integration, data mining and information fusion, this system is a digital geological information platform which service spatial information mechanism and analysis model system.4G information system combines with the above data model and method, gives a series of spatial autocorrelation methods: the study of simplified calculation method of generalized spatial variation function and requesting different models, establish a interface module of spatial analysis; the study of theoretical core of extraction and amplification mode of weak abnormal signal, The main contents are as follow: (a) finding a regional quantitative classification method of spatial data to reflect the intrinsic link between geological elements; (b) filtering noise preprocessing of the regional geological spatial data, putting forward a range model of geological spatial data; (c) investigating the structure and combination of the geological spatial data. There are four key technology of 4G information system: the integration of four different databases, the selection of open platform and the update problem of evaluation method packages.Fourthly, the study of structure and component interface technology of 4G information system. The structural design of the system include the following elements:A. Requirements analysis. The main task of this phase is to describe the business process and data requirement in detail. It is the basis for subsequent design phases.B. The design principles of system structure. This part include two aspects: the data structure design and overall structure design. The data structure design can ensure the efficiency of the system modules and the quality of space operations, provide the optimal data model for 4G information system, establish a database and meet various applications needs. System architecture design follows three principles: applicability, advance and openness; adopt modular design method, connect each module. 4G information system has four subsystem: 4G geological database subsystem, space operations subsystem, geosciences modeling subsystem and results expression subsystem.C. The design of 4G geological databases. 4G geological databases design include two parts: spatial database design and non-spatial database design. Spatial data include graphic date, image data and attribute data which is associated with graphic date and image data. Therefore, the design of spatial database should be according to the two different types of data. Non-spatial data includes two types of date: structured data and unstructured data. Structured data mainly refers to the date who has a certain structure and can be divided into fixed basic elements. It can be expressed by table. Unstructured data are some documents. D. The function module of 4G information system. This system includes seven main function module: maps management module, special subject retrieval module, layer control module, additional modules, format conversion module, requesting different module, resource evaluation modules and so on. Each module has specific function and provide specific service for 4G information system.