This paper introduces the concepts and theory of sde ( spatial data engineer ) , and presents some key technologies , such as the model of sde , the efficiency of sde , data consist of multi - user edit , etc 摘要介紹了空間數據引擎的概念和原理,剖析了空間數據模型、引擎效率、多用戶編輯的數據一致性、多數據源支持等空間數據引擎的關鍵技術。