The geographical information system software-Arcgis is a set of integrated software packages with powerful ability to process spatial data developed by ESRI. In 2007, Ranky Software Development Ltd developed the Shenzhen atmospheric quality management & strategy-decision supporting system (SAMS), for urban air quality management and decision-makers. Developed on the platform of GIS Arcgis, SAMS developed a powerful ability to process the spatial data of Arcgis, and provides a set of medi-entry-data lists based on the formats of the Arcgis file. To enclose various formats data, the medi-entry-data module has three key functions:(1) directly form, edit, append, delete the space and attribute data, (2) convert entry-data into formats accepted by SAMS. Besides, (3) automatically form surface pollution sources. Through dynamic data exchange and a dynamically linked library, we makes the subsidary systems of pollution sources, meteorogical data, models and GIS link up seamlessly. This provides a viewable simulation environment for users promoting the efficiency and accuracy of the simulation.

SAMS is made up of six function modules: the contaminating meteorological module, the module of pollution source data, the environmental quality assessment module, the environmental impact assessment module (module of simulation models), the social and economic information module, the library of standards module. The contaminating meteorological module mainly supports pollution meteorological condition analysis, providing the necessary data (wind field structure, atmospheric stability, etc.) for calculation and forecasting models. The module of pollution source data includes the environmental survey data concerning the pollution sources of Shenzhen, the reported and registered pollutant emission data, and working statues of air pollution sources in each enterprise. It supports functions of querying and retrieving pollution sources, recognizing main pollution sources and outputting the main air pollution sources, etc. The environmental quality assessment module is used to display and assess the routine environmental monitoring data from the exiting air monitoring observatories in Shenzhen. The environmental impact assessment module forecasts the pollution impact on air environment quality using computer models.

Atmospheric quality control is one of the basic responsibilities for environmental protection departments. It involves pollution sources status, pollution meteorological status, current environmental quality status and predicting the distribution of each air composition with mathematical models. It is a complex, varied project including numerous and jumbled information (space data or other). SAMS is devised to deal with such problems. SAMS' users can query the current status of air pollution sources and air pollutant discharge, air environmental quality, social and economic conditions, the energy consuming statues of each industries, and use environmental models to predict environmental impact on planning projects, make urban developing programs according to trade standards and the national policies and statutes.

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