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中文摘要：
针对目前地理空间数据整合与持续高效更新存在的问题，将“数据同化”这一概念和思想引入地理空间数据的更新，目的是提高空间数据质量和空间数据库更新的效率。着重论述了“地理空间数据同化”的概念、内涵和关键技术。最后提出了“地理事件-条件-操作GECA（Geographical Event—Condition-Action）”规则驱动下的基于数据同化的地理空间数据更新机制。
英文摘要：
There exist many problems in integrating and efficiently updating geospatial data at the present time. In accordance with this, a concept of data assimilation for updating geospatial data was imtrodueed. The purpose was to improve the quality and updating efficiency of geospatial data. The concept, connotation and key technologies of multi-source geospatial data assimilation were described. Finally, the geospatial data updating mechanism driven GECA（Geographic Event-Condition-Action） rules was presented based on data assimilation.
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