Letter of Motivation GIS is a mapping based on measurements, a data base is used to store and use the data source, to computer programming as a platform for the global spatial analysis of instant technique. This is the essence of GIS, but also the core. The physical world in which everything is firmly on a time mark. People's production and life eighty per cent of the above information and geographic spatial position. Geographic Information System ( Geographic Information System, referred to as GIS ) as acquisition, storage, analysis and management of spatial data is important tools, techniques and disciplines, in recent years has received widespread attention and rapid development. With the development of information technology, the digital era, theoretically speaking, GIS can be applied to any industry at the present stage. From the technology and the application point of view, GIS is to solve the space problem of tools, methods and techniques; From a multidisciplinary perspective, GIS is in the geography, cartography, surveying and computer science developed on the basis of a discipline, has the independent discipline system; From the function, GIS has spatial data acquisition, storage, display, editing, processing, analysis, output and application functions; From the point of view of system, GIS has some structure and GIS geographic information system ( Geographic Information System ), after 40 years of development, today has become a relatively mature technology, and has been widely applied. Especially in recent years, the GIS with its powerful GIS spatial analysis function, in the GPS and path optimization plays an increasingly important role in. GIS geographic information system on the basis of geospatial database, in the computer hardware and software support, using the system engineering and information science theory, scientific management and comprehensive analysis of the content of geographic data space, so as to provide the management, decision making and other required information technology system. In simple terms, geographical information system is integrated processing and analysis of geographic spatial data of a technical system. Function, is a complete system. Geographic Information System in the recent 30 years made a surprising development, widely used in resource survey, environmental assessment, disaster forecast, land management, city planning, communications, transportation, military police, water conservancy and electric power, public facilities management, animal husbandry, statistics, the commercial finance in almost all fields. ( plus mapping, emergency, petrochemical and other various fields of the national economy. ) Because of the rapid development of the GIS system, wide application, as well as the importance of national production, I am also interested, but because I have learned professional reasons, I will concentrate on this. ButNot too much energy. To do other things, I just want to know something about it .
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