Comgis Sources Of Pollution Of Urban Management And Early Warning Information System-based Research And Development

Geographic informantion system is a decision support system,it has various characters of informantion system .Traditional science and modern technology which will combine a variety of disciplines involved in spatial data analysis provides a new approach. With the computer software and hardware technology development and popularization of geographic information systems are gradually becoming more mature. It has been applied to the resources and the environment, social, military, economic and other fields. In the investigation and management, resource assessment, disaster forecasting, environmental assessment and monitoring, urban planning, engineering, site selection and other aspects of GIS has played a significant role.The syetem study Shapingba the first national census of pollution sources in the background to GIS as a development platform,the establishment of regional pollution sources based on COMGIS management and early warning information syetems research and development,the system can perform the following functions:(1) system is simple,providing interactive and visual environment in which complex patterns and data processing transparent to the user; (2) sources of information details displayed in the Shapingba District of electronic maps, electronic maps, we can see the types of pollution sources, pollution of the characteristics and sources of pollution basic information; (3) for environmental management in the implementation of the various data classification management, according to real-time data updating of data sources or monitoring points, and point pollution sources or monitoring data management, such as sources of data to establish a database to increase the field, records, data changes, derived data deletion; (4) system to the attribute database and spatial database, data for target interactive queries, which is two basic ways to search: location-based queries, that is, from the map to the attribute data query ; based on the attribute query, spatial databases from the property to the query; (5) in the Shapingba District of electronic electronic map to the database, based on position in space to achieve the concentration of control and total control. That Dangdang an excessive concentration of pollutants, the system will alarm automatically activated alarm procedures, while calling search programs to determine the pollution sources Location of sources of pollution.This paper first discusses the domestic and international environmental information system and the current state of development of the research focus, detailed environmental information system components, development methods, development platforms and component-based GIS features and principles, and system development tools for MapX Control were introduced, and depth of the system design, system establishment of the database, the system main functions and implementation of relevant technical and other content, and data sources in order to Shapingba the application of the system functions were tested and demonstrated that the system has reached a the intended purpose and requirements of environmental information management to meet the daily needs, with strong operational and significant practical value.