THE DESIGN OF GEOGRAPHICAL INFORMATION SEARCH SYSTEM FOR SUBTERRANEAN TUBE NET OF CITY

摘要

City is a human-geographic relationship system which is mainly composed of human and which is a complicate and big system. It embodies dependence and interaction between people and environment. It is composed of government, enterprises and citizens, among of which people are the main part. This kind of human-geographic relationship embodies concretely in government management, commercial affairs of enterprises and production and life of citizens. Information reflects movement and law of the whole or part real system. With the development of information technology and the people's further understanding of the reality, people can apply information technology to construct information system, which corresponds to a real system. GIS (Geographical Information System) is integration of people, geographical environment and information. Subterranean tube net system is a part of geographic information system. It is a compute intelligent system that can handle input, output, management, search and analysis of information data. Among of which, search of information data is a principal function. CAD and database technology was applied to finish the operation of addition, deletion and modification of graphic information and attribute data. Data and attribute of graphic information is comprehended by means of search. The article is a typical case about subterranean tube net search system of city concerned about the design for search system.