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(shù)據(jù)引擎的概念和原理,剖析了空間數(shù)據(jù)模型、引擎效率、多用戶編輯的數(shù)據(jù)一致性、多數(shù)據(jù)源支持等空間數(shù)據(jù)引擎的關(guān)鍵技術(shù)。