Abstract:

Because the seismic data is so various and is continuously increasing in number,sharing seismic data and providing data service is more difficult.This paper proposes a method to optimize the existing seismic data model based on the modeling tool of PowerDesigner.The method was initially applied to the exiting 1/4000000 active fault GIS database.Aimed at the actual problem of active fault GIS database,the method realizes the optimization of fault data model.And the optimized fault database was applied to specific example cases.Meanwhile,comparative analysis was done between the optimized PDM with the old one.The result shows that the optimized model is more flexible and convenient to use,the data description is more accurate,the relationship between data is clearer,and the data constraint is more standard and complete. It can meet the different needs of seismologists.The proposed optimization method for earthquake data model has a certain value of popularization and application,and it lays a good foundation for seismic data sharing and data service in the future.

Key words: PowerDesigner, seismic data model, data model optimization, database

摘要：

由于地震数据种类繁多且数量不断增大,使得地震数据共享和数据服务面临的困难越来越大。针对这个问题,提出了基于PowerDesigner建模工具对已有的地震数据模型进行优化的过程方法。并将此方法初步应用于现有的1/400 万活动断层GIS数据库中,针对该库目前存在的问题,实现了对断层数据模型的优化,结合具体的实例,应用了优化后的断层数据库。同时,将优化前后的断层数据物理模型进行了对比分析,表明优化后的模型使用起来更加灵活、方便,数据描述更加准确,数据之间的关系更加清晰,数据约束更加规范、完善,能够满足地震工作者不同的需求,为今后的地震数据共享和数据服务奠定了良好的基础。

关键词: PowerDesigner, 地震数据模型, 数据模型优化, 数据库