摘要
讨论几种常用的二维和三维空间数据模型，逐一介绍镶嵌模型、矢量模型、混合模型和分析模型的建模方式，并分析了它们的主要优缺点。
Serveral types of extensively used spatial data models both for 2D GIS and 3D GIS are discussed.Such models as tesselating model,vector model,hybrid model and analytical model are analysed.Both their advantage and disadvantages are given.
