Research And Development Of Common Electric Map For Changchun Based On VB And Mapx Control

In Twenty century 60's, people introduce the Information Technology into the management of Geographical Science and construct the Geographical Information System, only since for evaluating the efficiency of management for geographical information by computer's digital form. For example, measurement on the map, and computer aided mapping and cartergraphy or automatic cartography system design and development by many countries. With the development of technology and people's progress of recognition, the functions of the system being more progressively and sophisticated. For another hand, it's will progressively evaluate the efficiency of work and magnify the quality of science and physical if system expose all information interested by peoples in the form of electric map. 30 years after the management and analysis of digital geographical information system, GIS has been introduced many domain and have interested many peoples. Now, in our country, many large cities have developed city electric map system, for instance, Cities Windows, Common Information Query System, etc.In the environment above, major in scale of 1:16000 map of changchun city, minor in scale of 1:20000 digital form map, design and development by the second development.User can add geoset and delete geoset very easily by this software system, and Layer's ZoomOut, Layer's Zoomln, Layer's Pan etc, add Feature and Features into the layers interested by people through this system. User can query attribute and spatial data from click corresponding form and objects. The system have several functions as followed:The management of spatial data layer,The edit of spatial data,The query of attribute data and measurement of spatial dataThe query of spatial data,The management of common buses and trucks.