摘要：The components of map information are analyzed theoretically in this paper,and the map information includes mainly the spatial information,attributive information and temporal characteristics *** the digital map entity is defined according to construction characteristics of the map ***,on the basis of the analyses of the construction characteristics of digital map entity and present conceptual model of digital map database,an abstracted conceptual model of digital map database is *** the Normal Form theory of relational database is discussed particularly.