Graphic system can realize data visualization, data query, assistant decision during earthquake by kinds of operation to the map.

图形系统可对地图进行各种操作，完成数据显示、数据查询分析、地震辅助决策等。

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The system was provided with function of workspace, data and map management, object operation, spatial query and analysis in the environment of GIS.

该系统具有GIS工作空间管理功能、数据管理功能、地图管理功能、对象操作功能、查询及空间分析功能；

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Basing on such GIS data model, we design a GIS electronic map system, which contains most basic GIS functions, such as object-create, map zoom, wandering, query and so on.

运用此模型，设计了一个基本的GIS电子地图实验系统，实现了GIS中地图对象的创建、地图的漫游、缩放、查询等功能。

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