In this article, analyzing the difference between Leading Geological GIS and ArcGIS in data structure, realizing the data conversion between Leading Geological GIS and ArcGIS, achieving the order that data communition.%SY析了理正工程地质勘察系统与ArcGIS之间数据结构上的差异性，并在此基础上实现了理正工程地质勘察数据向ArcGIS数据的相互转换，达到了数据共享的目的。
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