chapter iv, " the unite of gis and oa ", embarks from a concrete oa system and project, elaborated how to insert the gis system into the oa system, from the aspects of map function, parameter transmission, edition control and so on, and finally produced several feasible solutions by comparing each other 第四章“gis和oa的结合”从一个具体的oa系统和项目出发,从地图功能、参数传递和版本控制等方面,论述了如何把gis系统嵌入到oa系统中,并在最后有比较的给出了几种切实可行的解决方案。